{"id":7942,"date":"2021-06-07T07:16:40","date_gmt":"2021-06-07T07:16:40","guid":{"rendered":"https:\/\/thuvienxaydung.com.vn\/?p=7942"},"modified":"2021-06-07T07:17:46","modified_gmt":"2021-06-07T07:17:46","slug":"tieu-chuan-viet-nam-tcvn-62851997-iso-6935-2-1980-ve-thep-cot-be-tong-thep-thanh-van","status":"publish","type":"post","link":"https:\/\/tailieuxaydung.net\/?p=7942","title":{"rendered":"Ti\u00eau chu\u1ea9n Vi\u1ec7t Nam TCVN 6285:1997 (ISO 6935-2 : 1980) v\u1ec1 th\u00e9p c\u1ed1t b\u00ea t\u00f4ng &#8211; Th\u00e9p thanh v\u1eb1n"},"content":{"rendered":"<h2 class=\"push-10 h5\">N\u1ed9i dung to\u00e0n v\u0103n Ti\u00eau chu\u1ea9n Vi\u1ec7t Nam TCVN 6285:1997 (ISO 6935-2 : 1980) v\u1ec1 th\u00e9p c\u1ed1t b\u00ea t\u00f4ng &#8211; Th\u00e9p thanh v\u1eb1n<\/h2>\n<hr \/>\n<div>\n<div>\n<p align=\"center\"><b>TI\u00caU CHU\u1ea8N VI\u1ec6T NAM<\/b><\/p>\n<p align=\"center\"><b>TCVN 6285 : 1997<\/b><\/p>\n<p align=\"center\"><b>ISO 6935-2 : 1980<\/b><\/p>\n<p align=\"center\">TH\u00c9P C\u1ed0T B\u00ca T\u00d4NG &#8211; TH\u00c9P THANH V\u1eb0N<\/p>\n<p align=\"center\"><i>Steel for the reinforcement of concrete &#8211; Ribbed bars<\/i><\/p>\n<p><b>L\u1eddi n\u00f3i \u0111\u1ea7u<\/b><\/p>\n<p>TCVN 6285 : 1997 thay th\u1ebf cho c\u00e1c \u0111i\u1ec1u quy \u0111\u1ecbnh cho th\u00e9p c\u1ed1t nh\u00f3m CII, CIII, CIV c\u1ee7a TCVN 1651-85.<\/p>\n<p>TCVN 6285 : 1997 ho\u00e0n to\u00e0n t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi ISO 6935-2 : 1991.<\/p>\n<div class=\"google-auto-placed ap_container\"><ins class=\"adsbygoogle adsbygoogle-noablate\" data-ad-format=\"auto\" data-ad-client=\"ca-pub-4318815816536903\" data-adsbygoogle-status=\"done\" data-ad-status=\"unfilled\"><ins id=\"aswift_5_expand\" tabindex=\"0\" title=\"Advertisement\" aria-label=\"Advertisement\"><ins id=\"aswift_5_anchor\"><iframe id=\"aswift_5\" src=\"https:\/\/googleads.g.doubleclick.net\/pagead\/ads?client=ca-pub-4318815816536903&amp;output=html&amp;h=280&amp;adk=2016488619&amp;adf=1799484994&amp;pi=t.aa~a.408038455~i.7~rp.4&amp;w=777&amp;fwrn=4&amp;fwrnh=100&amp;lmt=1623050172&amp;num_ads=1&amp;rafmt=1&amp;armr=3&amp;sem=mc&amp;pwprc=9666130140&amp;psa=1&amp;ad_type=text_image&amp;format=777x280&amp;url=https%3A%2F%2Fvanbanphapluat.co%2Ftcvn-6285-1997-thep-cot-be-tong-thep-thanh-van&amp;flash=0&amp;fwr=0&amp;pra=3&amp;rh=194&amp;rw=776&amp;rpe=1&amp;resp_fmts=3&amp;wgl=1&amp;fa=27&amp;adsid=ChAI8If3hQYQ9YeVx8Gdo69yEkwAUgPS1N_wW6RulbIDxJzE5cXvPmD5OXnAnXP3nzTBSMbQp2mtwX3dYnlGPJXXI9oGu_4j6IN4oHxi09b2Wn4VxUkWsVUY1gUUQLxj&amp;uach=WyJXaW5kb3dzIiwiMTAuMCIsIng4NiIsIiIsIjkxLjAuNDQ3Mi43NyIsW11d&amp;dt=1623050172563&amp;bpp=3&amp;bdt=1238&amp;idt=-M&amp;shv=r20210601&amp;cbv=%2Fr20190131&amp;ptt=9&amp;saldr=aa&amp;abxe=1&amp;cookie=ID%3D04a8e5bc6641345e-2208b71743c90059%3AT%3D1623041435%3ART%3D1623041435%3AS%3DALNI_MaSytZSsLDc0rd2gmtdT5yt-R3x9w&amp;prev_fmts=0x0%2C1140x280%2C374x280%2C374x280&amp;nras=2&amp;correlator=2209900803822&amp;frm=20&amp;pv=1&amp;ga_vid=2110209687.1623041435&amp;ga_sid=1623050172&amp;ga_hid=1994776284&amp;ga_fc=0&amp;u_tz=420&amp;u_his=1&amp;u_java=0&amp;u_h=1080&amp;u_w=1920&amp;u_ah=1040&amp;u_aw=1920&amp;u_cd=24&amp;u_nplug=3&amp;u_nmime=4&amp;adx=362&amp;ady=1268&amp;biw=1903&amp;bih=880&amp;scr_x=0&amp;scr_y=0&amp;eid=42530671%2C44744331%2C21065725&amp;oid=3&amp;psts=AGkb-H9EjS5IghpVIFcNO4q5pHRJB6ZCtbz7jJIvBvkfzhelsxn-DiGr7Q3a5iQuC3S7nhbRZYHpCz2Q_xk&amp;pvsid=987718246934922&amp;pem=841&amp;ref=https%3A%2F%2Fwww.google.com.vn%2F&amp;eae=0&amp;fc=1408&amp;brdim=0%2C0%2C0%2C0%2C1920%2C0%2C1920%2C1040%2C1920%2C880&amp;vis=1&amp;rsz=%7C%7Cs%7C&amp;abl=NS&amp;fu=128&amp;bc=31&amp;jar=2021-06-07-07&amp;ifi=6&amp;uci=a!6&amp;btvi=2&amp;fsb=1&amp;xpc=gulHjf5RIA&amp;p=https%3A\/\/vanbanphapluat.co&amp;dtd=21\" name=\"aswift_5\" width=\"777\" height=\"280\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" sandbox=\"allow-forms allow-popups allow-popups-to-escape-sandbox allow-same-origin allow-scripts allow-top-navigation-by-user-activation\" allowfullscreen=\"allowfullscreen\" data-google-container-id=\"a!6\" data-load-complete=\"true\" data-google-query-id=\"CKm_s4j9hPECFRQZvAodsuIBtA\" data-mce-fragment=\"1\"><\/iframe><\/ins><\/ins><\/ins><\/div>\n<p>TCVN 6285 : 1997 do Ban K\u1ef9 thu\u1eadt ti\u00eau chu\u1ea9n TCVN\/TC 17 Th\u00e9p bi\u00ean so\u1ea1n, T\u1ed5ng c\u1ee5c Ti\u00eau chu\u1ea9n &#8211; \u0110o l\u01b0\u1eddng &#8211; Ch\u1ea5t l\u01b0\u1ee3ng \u0111\u1ec1 ngh\u1ecb, B\u1ed9 Khoa h\u1ecdc, C\u00f4ng ngh\u1ec7 v\u00e0 M\u00f4i tr\u01b0\u1eddng ban h\u00e0nh.<\/p>\n<p>&nbsp;<\/p>\n<p align=\"center\"><b>TH\u00c9P C\u1ed0T B\u00ca T\u00d4NG &#8211; TH\u00c9P THANH V\u1eb0N<\/b><\/p>\n<p align=\"center\"><b><i>Steel for the reinforcement of concrete &#8211; Ribbed bars<\/i><\/b><\/p>\n<p><b>1. Ph\u1ea1m vi v\u00e0 l\u0129nh v\u1ef1c \u00e1p d\u1ee5ng<\/b><\/p>\n<p>Ti\u00eau chu\u1ea9n n\u00e0y quy \u0111\u1ecbnh c\u00e1c y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt cho th\u00e9p thanh v\u1eb1n \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 l\u00e0m c\u1ed1t trong c\u00e1c k\u1ebft c\u1ea5u b\u00ea t\u00f4ng th\u00f4ng th\u01b0\u1eddng v\u00e0 \u0111\u1ec3 l\u00e0m c\u1ed1t kh\u00f4ng d\u1ef1 \u1ee9ng l\u1ef1c trong c\u00e1c k\u1ebft c\u1ea5u b\u00ea t\u00f4ng d\u1ef1 \u1ee9ng l\u1ef1c.<\/p>\n<p>Quy \u0111\u1ecbnh 5 lo\u1ea1i th\u00e9p, trong \u0111\u00f3 lo\u1ea1i RB 300, RB 400 v\u00e0 RB 500 l\u00e0 nh\u1eefng lo\u1ea1i kh\u00f3 h\u00e0n. Hai lo\u1ea1i th\u00e9p RB 400W v\u00e0 RB 500W l\u00e0 d\u1ec5 h\u00e0n b\u1eb1ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p h\u00e0n th\u00f4ng th\u01b0\u1eddng.<\/p>\n<p>Ti\u00eau chu\u1ea9n n\u00e0y \u00e1p d\u1ee5ng cho th\u00e9p c\u00e1n n\u00f3ng kh\u00f4ng qua x\u1eed l\u00fd ti\u1ebfp theo, th\u00e9p c\u00e1n n\u00f3ng \u0111\u01b0\u1ee3c l\u00e0m ngu\u1ed9i c\u00f3 kh\u1ed1ng ch\u1ebf v\u00e0 ram, th\u00e9p gia c\u00f4ng ngu\u1ed9i.\u00a0 C\u00f4ng ngh\u1ec7 s\u1ea3n xu\u1ea5t do ng\u01b0\u1eddi s\u1ea3n xu\u1ea5t l\u1ef1a ch\u1ecdn.<\/p>\n<div class=\"google-auto-placed ap_container\"><ins class=\"adsbygoogle adsbygoogle-noablate\" data-ad-format=\"auto\" data-ad-client=\"ca-pub-4318815816536903\" data-adsbygoogle-status=\"done\" data-ad-status=\"unfilled\"><ins id=\"aswift_6_expand\" tabindex=\"0\" title=\"Advertisement\" aria-label=\"Advertisement\"><ins id=\"aswift_6_anchor\"><iframe id=\"aswift_6\" src=\"https:\/\/googleads.g.doubleclick.net\/pagead\/ads?client=ca-pub-4318815816536903&amp;output=html&amp;h=280&amp;adk=2016488619&amp;adf=96492416&amp;pi=t.aa~a.408038455~i.15~rp.4&amp;w=777&amp;fwrn=4&amp;fwrnh=100&amp;lmt=1623050172&amp;num_ads=1&amp;rafmt=1&amp;armr=3&amp;sem=mc&amp;pwprc=9666130140&amp;psa=1&amp;ad_type=text_image&amp;format=777x280&amp;url=https%3A%2F%2Fvanbanphapluat.co%2Ftcvn-6285-1997-thep-cot-be-tong-thep-thanh-van&amp;flash=0&amp;fwr=0&amp;pra=3&amp;rh=194&amp;rw=776&amp;rpe=1&amp;resp_fmts=3&amp;wgl=1&amp;fa=27&amp;adsid=ChAI8If3hQYQ9YeVx8Gdo69yEkwAUgPS1N_wW6RulbIDxJzE5cXvPmD5OXnAnXP3nzTBSMbQp2mtwX3dYnlGPJXXI9oGu_4j6IN4oHxi09b2Wn4VxUkWsVUY1gUUQLxj&amp;uach=WyJXaW5kb3dzIiwiMTAuMCIsIng4NiIsIiIsIjkxLjAuNDQ3Mi43NyIsW11d&amp;dt=1623050172563&amp;bpp=2&amp;bdt=1239&amp;idt=-M&amp;shv=r20210601&amp;cbv=%2Fr20190131&amp;ptt=9&amp;saldr=aa&amp;abxe=1&amp;cookie=ID%3D04a8e5bc6641345e-2208b71743c90059%3AT%3D1623041435%3ART%3D1623041435%3AS%3DALNI_MaSytZSsLDc0rd2gmtdT5yt-R3x9w&amp;prev_fmts=0x0%2C1140x280%2C374x280%2C374x280%2C777x280&amp;nras=3&amp;correlator=2209900803822&amp;frm=20&amp;pv=1&amp;ga_vid=2110209687.1623041435&amp;ga_sid=1623050172&amp;ga_hid=1994776284&amp;ga_fc=0&amp;u_tz=420&amp;u_his=1&amp;u_java=0&amp;u_h=1080&amp;u_w=1920&amp;u_ah=1040&amp;u_aw=1920&amp;u_cd=24&amp;u_nplug=3&amp;u_nmime=4&amp;adx=362&amp;ady=1980&amp;biw=1903&amp;bih=880&amp;scr_x=0&amp;scr_y=0&amp;eid=42530671%2C44744331%2C21065725&amp;oid=3&amp;psts=AGkb-H9EjS5IghpVIFcNO4q5pHRJB6ZCtbz7jJIvBvkfzhelsxn-DiGr7Q3a5iQuC3S7nhbRZYHpCz2Q_xk&amp;pvsid=987718246934922&amp;pem=841&amp;ref=https%3A%2F%2Fwww.google.com.vn%2F&amp;eae=0&amp;fc=1408&amp;brdim=0%2C0%2C0%2C0%2C1920%2C0%2C1920%2C1040%2C1920%2C880&amp;vis=1&amp;rsz=%7C%7Cs%7C&amp;abl=NS&amp;fu=128&amp;bc=31&amp;jar=2021-06-07-07&amp;ifi=7&amp;uci=a!7&amp;btvi=3&amp;fsb=1&amp;xpc=Yh6Md2ZSDF&amp;p=https%3A\/\/vanbanphapluat.co&amp;dtd=26\" name=\"aswift_6\" width=\"777\" height=\"280\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" sandbox=\"allow-forms allow-popups allow-popups-to-escape-sandbox allow-same-origin allow-scripts allow-top-navigation-by-user-activation\" allowfullscreen=\"allowfullscreen\" data-google-container-id=\"a!7\" data-google-query-id=\"CKuAtIj9hPECFZOGvAodtXIM4Q\" data-load-complete=\"true\" data-mce-fragment=\"1\"><\/iframe><\/ins><\/ins><\/ins><\/div>\n<p>Ti\u00eau chu\u1ea9n n\u00e0y c\u0169ng \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng cho th\u00e9p c\u1ed1t \u0111\u01b0\u1ee3c cung c\u1ea5p \u1edf d\u1ea1ng cu\u1ed9n. C\u00e1c y\u00eau c\u1ea7u c\u1ee7a ti\u00eau chu\u1ea9n n\u00e0y \u00e1p d\u1ee5ng cho s\u1ea3n ph\u1ea9m n\u1eafn th\u1eb3ng.<\/p>\n<p>Ti\u00eau chu\u1ea9n n\u00e0y kh\u00f4ng \u00e1p d\u1ee5ng cho th\u00e9p thanh v\u1eb1n \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o t\u1eeb c\u00e1c lo\u1ea1i s\u1ea3n ph\u1ea9m kh\u00e1c nh\u01b0 t\u1ea5m hay \u0111\u01b0\u1eddng ray xe l\u1eeda. Ti\u00eau chu\u1ea9n n\u00e0y c\u0169ng kh\u00f4ng \u00e1p d\u1ee5ng cho th\u00e9p thanh d\u00f9ng \u0111\u1ec3 l\u00e0m m\u00f3c n\u00e2ng.<\/p>\n<p><b>2. Ti\u00eau chu\u1ea9n tr\u00edch d\u1eabn<\/b><\/p>\n<p>ISO 377 &#8211; 2 : 1989 L\u1ea5y v\u00e0 chu\u1ea9n b\u1ecb m\u1eabu v\u00e0 m\u1eabu th\u1eed c\u1ee7a th\u00e9p gia c\u00f4ng \u00e1p l\u1ef1c &#8211; Ph\u1ea7n 2 : M\u1eabu \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc;<\/p>\n<p>ISO \/ IEC Guide 2 C\u00e1c thu\u1eadt ng\u1eef chung v\u00e0 c\u00e1c \u0111\u1ecbnh ngh\u0129a c\u1ee7a ch\u00fang li\u00ean quan \u0111\u1ebfn ti\u00eau chu\u1ea9n h\u00f3a v\u00e0 c\u00e1c ho\u1ea1t \u0111\u1ed9ng li\u00ean quan;<\/p>\n<p>ISO 404 : 1981 Th\u00e9p v\u00e0 c\u00e1c s\u1ea3n ph\u1ea9m th\u00e9p &#8211; Y\u00eau c\u1ea7u cung c\u1ea5p k\u1ef9 thu\u1eadt chung;<\/p>\n<p>ISO 6892 : 1984 V\u1eadt li\u1ec7u kim lo\u1ea1i &#8211; Th\u1eed k\u00e9o;<\/p>\n<p>ISO 8930 : 1987 Nguy\u00ean l\u00fd chung v\u1ec1 \u0111\u1ed9 tin c\u1eady c\u1ee7a c\u00e1c k\u1ebft c\u1ea5u &#8211; Danh s\u00e1ch c\u00e1c thu\u1eadt ng\u1eef t\u01b0\u01a1ng \u0111\u01b0\u01a1ng;<\/p>\n<p>TCVN 6287 : 1997 Th\u00e9p thanh c\u1ed1t b\u00ea t\u00f4ng &#8211; Th\u1eed u\u1ed1n v\u00e0 u\u1ed1n l\u1ea1i kh\u00f4ng ho\u00e0n to\u00e0n;<\/p>\n<p>ISO 10144 : 1991 H\u1ec7 th\u1ed1ng ch\u1ee9ng nh\u1eadn cho th\u00e9p thanh v\u00e0 d\u00e2y l\u00e0m c\u1ed1t cho c\u00e1c k\u1ebft c\u1ea5u b\u00ea t\u00f4ng.<\/p>\n<p><b>3. \u0110\u1ecbnh ngh\u0129a<\/b><\/p>\n<p>Trong ti\u00eau chu\u1ea9n n\u00e0y s\u1eed d\u1ee5ng c\u00e1c \u0111\u1ecbnh ngh\u0129a sau.<\/p>\n<p><b>3.1. Ph\u00e2n t\u00edch \u0111\u00fac:<\/b>\u00a0Ph\u00e2n t\u00edch th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a m\u1eabu th\u00e9p l\u1ecfng trong qu\u00e1 tr\u00ecnh \u0111\u00fac.<\/p>\n<p><b>3.2. H\u1ec7 th\u1ed1ng ch\u1ee9ng nh\u1eadn<\/b>\u00a0: H\u1ec7 th\u1ed1ng ch\u1ee9ng nh\u1eadn li\u00ean quan \u0111\u1ebfn c\u00e1c s\u1ea3n ph\u1ea9m, c\u00e1c qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t hay d\u1ecbch v\u1ee5 tu\u00e2n theo nh\u1eefng ti\u00eau chu\u1ea9n v\u00e0 quy \u0111\u1ecbnh ri\u00eang bi\u1ec7t v\u00e0 c\u00f3 c\u00f9ng c\u00e1ch ti\u1ebfn h\u00e0nh [ISO \/ IEC Guide 2].<\/p>\n<div class=\"google-auto-placed ap_container\"><ins class=\"adsbygoogle adsbygoogle-noablate\" data-ad-format=\"auto\" data-ad-client=\"ca-pub-4318815816536903\" data-adsbygoogle-status=\"done\" data-ad-status=\"filled\"><ins id=\"aswift_7_expand\" tabindex=\"0\" title=\"Advertisement\" aria-label=\"Advertisement\"><ins id=\"aswift_7_anchor\"><iframe id=\"aswift_7\" src=\"https:\/\/googleads.g.doubleclick.net\/pagead\/ads?client=ca-pub-4318815816536903&amp;output=html&amp;h=280&amp;adk=2016488619&amp;adf=1808864308&amp;pi=t.aa~a.408038455~i.29~rp.4&amp;w=777&amp;fwrn=4&amp;fwrnh=100&amp;lmt=1623050172&amp;num_ads=1&amp;rafmt=1&amp;armr=3&amp;sem=mc&amp;pwprc=9666130140&amp;psa=1&amp;ad_type=text_image&amp;format=777x280&amp;url=https%3A%2F%2Fvanbanphapluat.co%2Ftcvn-6285-1997-thep-cot-be-tong-thep-thanh-van&amp;flash=0&amp;fwr=0&amp;pra=3&amp;rh=194&amp;rw=776&amp;rpe=1&amp;resp_fmts=3&amp;wgl=1&amp;fa=27&amp;adsid=ChAI8If3hQYQ9YeVx8Gdo69yEkwAUgPS1N_wW6RulbIDxJzE5cXvPmD5OXnAnXP3nzTBSMbQp2mtwX3dYnlGPJXXI9oGu_4j6IN4oHxi09b2Wn4VxUkWsVUY1gUUQLxj&amp;uach=WyJXaW5kb3dzIiwiMTAuMCIsIng4NiIsIiIsIjkxLjAuNDQ3Mi43NyIsW11d&amp;dt=1623050172563&amp;bpp=1&amp;bdt=1239&amp;idt=1&amp;shv=r20210601&amp;cbv=%2Fr20190131&amp;ptt=9&amp;saldr=aa&amp;abxe=1&amp;cookie=ID%3D04a8e5bc6641345e-2208b71743c90059%3AT%3D1623041435%3ART%3D1623041435%3AS%3DALNI_MaSytZSsLDc0rd2gmtdT5yt-R3x9w&amp;prev_fmts=0x0%2C1140x280%2C374x280%2C374x280%2C777x280%2C777x280&amp;nras=4&amp;correlator=2209900803822&amp;frm=20&amp;pv=1&amp;ga_vid=2110209687.1623041435&amp;ga_sid=1623050172&amp;ga_hid=1994776284&amp;ga_fc=0&amp;u_tz=420&amp;u_his=1&amp;u_java=0&amp;u_h=1080&amp;u_w=1920&amp;u_ah=1040&amp;u_aw=1920&amp;u_cd=24&amp;u_nplug=3&amp;u_nmime=4&amp;adx=362&amp;ady=2966&amp;biw=1903&amp;bih=880&amp;scr_x=0&amp;scr_y=0&amp;eid=42530671%2C44744331%2C21065725&amp;oid=3&amp;psts=AGkb-H9EjS5IghpVIFcNO4q5pHRJB6ZCtbz7jJIvBvkfzhelsxn-DiGr7Q3a5iQuC3S7nhbRZYHpCz2Q_xk&amp;pvsid=987718246934922&amp;pem=841&amp;ref=https%3A%2F%2Fwww.google.com.vn%2F&amp;eae=0&amp;fc=1408&amp;brdim=0%2C0%2C0%2C0%2C1920%2C0%2C1920%2C1040%2C1920%2C880&amp;vis=1&amp;rsz=%7C%7Cs%7C&amp;abl=NS&amp;fu=128&amp;bc=31&amp;jar=2021-06-07-07&amp;ifi=8&amp;uci=a!8&amp;btvi=4&amp;fsb=1&amp;xpc=Kco0zxM6UL&amp;p=https%3A\/\/vanbanphapluat.co&amp;dtd=31\" name=\"aswift_7\" width=\"777\" height=\"280\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" sandbox=\"allow-forms allow-popups allow-popups-to-escape-sandbox allow-same-origin allow-scripts allow-top-navigation-by-user-activation\" allowfullscreen=\"allowfullscreen\" data-google-container-id=\"a!8\" data-google-query-id=\"CIivtIj9hPECFQIFvAodIuQDlQ\" data-load-complete=\"true\" data-mce-fragment=\"1\"><\/iframe><\/ins><\/ins><\/ins><\/div>\n<p><b>3.3. Gi\u00e1 tr\u1ecb \u0111\u1eb7c tr\u01b0ng<\/b>\u00a0: Gi\u00e1 tr\u1ecb c\u00f3 x\u00e1c xu\u1ea5t \u0111\u01b0\u1ee3c \u0111\u01b0a ra nh\u01b0ng ch\u01b0a \u0111\u1ea1t \u0111\u01b0\u1ee3c trong c\u00e1c lo\u1ea1t th\u1eed gi\u1ea3 thuy\u1ebft l\u00e0 kh\u00f4ng h\u1ea1n ch\u1ebf [ISO 8930].<\/p>\n<p>Ch\u00fa th\u00edch 1 &#8211; T\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi v\u00f9ng ph\u00e2n b\u1ed1 \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a trong ISO 3534.<\/p>\n<p><b>3.4. L\u00f5i<\/b>\u00a0: Ph\u1ea7n m\u1eb7t c\u1eaft ngang c\u1ee7a thanh kh\u00f4ng ch\u1ee9a c\u1ea3 c\u00e1c g\u00e2n d\u1ecdc c\u0169ng nh\u01b0 c\u00e1c g\u00e2n ngang.<\/p>\n<p><b>3.5. G\u00e2n d\u1ecdc<\/b>\u00a0: G\u00e2n li\u00ean t\u1ee5c \u0111\u1ec1u \u0111\u1eb7n song song v\u1edbi tr\u1ee5c c\u1ee7a thanh, tr\u01b0\u1edbc khi xo\u1eafn ngu\u1ed9i trong tr\u01b0\u1eddng h\u1ee3p c\u00e1c thanh \u0111\u01b0\u1ee3c xo\u1eafn ngu\u1ed9i.<\/p>\n<p><b>3.6. Di\u1ec7n t\u00edch m\u1eb7t c\u1eaft ngang danh ngh\u0129a<\/b>\u00a0: Di\u1ec7n t\u00edch m\u1eb7t c\u1eaft ngang t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi di\u1ec7n t\u00edch c\u1ee7a m\u1ed9t thanh tr\u00f2n tr\u01a1n c\u00f3 c\u00f9ng \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a.<\/p>\n<p><b>3.7. B\u01b0\u1edbc, P<\/b>\u00a0<b>(ch\u1ec9 \u0111\u1ed1i v\u1edbi c\u00e1c thanh xo\u1eafn) :<\/b>\u00a0Kho\u1ea3ng c\u00e1ch gi\u1eefa hai \u0111i\u1ec3m k\u1ec1 nhau t\u01b0\u01a1ng \u1ee9ng c\u1ee7a m\u1ed9t g\u00e2n d\u1ecdc.<\/p>\n<p><b>3.8. Ph\u00e2n t\u00edch s\u1ea3n ph\u1ea9m :<\/b>\u00a0Ph\u00e2n t\u00edch th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a m\u1eabu l\u1ea5y t\u1eeb thanh th\u00e9p v\u1eb1n.<\/p>\n<p><b>3.9. Chi\u1ec1u cao c\u1ee7a g\u00e2n,<\/b>\u00a0<b>a :<\/b>\u00a0Kho\u1ea3ng c\u00e1ch t\u1eeb \u0111i\u1ec3m cao nh\u1ea5t c\u1ee7a g\u00e2n (d\u1ecdc ho\u1eb7c ngang) \u0111\u1ebfn b\u1ec1 m\u1eb7t c\u1ee7a l\u00f5i, \u0111\u01b0\u1ee3c \u0111o tr\u00ean m\u1eb7t c\u1eaft vu\u00f4ng g\u00f3c v\u1edbi tr\u1ee5c c\u1ee7a thanh. (Xem h\u00ecnh 2).<\/p>\n<p><b>3.10. B\u01b0\u1edbc g\u00e2n,<\/b>\u00a0<b>c<\/b>\u00a0: Kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c t\u00e2m c\u1ee7a hai g\u00e2n ngang k\u1ec1 nhau \u0111\u01b0\u1ee3c \u0111o song song v\u1edbi tr\u1ee5c c\u1ee7a thanh. (Xem h\u00ecnh 1).<\/p>\n<p><b>3.11. G\u00e2n ngang<\/b>\u00a0: S\u1ef1 l\u1ed3i l\u00ean theo m\u1ed9t g\u00f3c ho\u1eb7c l\u00e0 vu\u00f4ng g\u00f3c ho\u1eb7c xi\u00ean so v\u1edbi tr\u1ee5c d\u1ecdc c\u1ee7a thanh.<\/p>\n<p><b>3.12. Chu vi ngang kh\u00f4ng c\u00f3 g\u00e2n,\u00a0<\/b><b>S<\/b><b>fi:<\/b>\u00a0T\u1ed5ng c\u00e1c kho\u1ea3ng c\u00e1ch theo b\u1ec1 m\u1eb7t c\u1ee7a l\u00f5i gi\u1eefa c\u00e1c g\u00e2n ngang c\u1ee7a c\u00e1c h\u00e0ng k\u1ec1 nhau \u0111\u01b0\u1ee3c \u0111o nh\u01b0 h\u00ecnh chi\u1ebfu l\u00ean m\u1eb7t ph\u1eb3ng vu\u00f4ng g\u00f3c v\u1edbi tr\u1ee5c thanh.<\/p>\n<div class=\"google-auto-placed ap_container\"><ins class=\"adsbygoogle adsbygoogle-noablate\" data-ad-format=\"auto\" data-ad-client=\"ca-pub-4318815816536903\" data-adsbygoogle-status=\"done\" data-ad-status=\"unfilled\"><ins id=\"aswift_8_expand\" tabindex=\"0\" title=\"Advertisement\" aria-label=\"Advertisement\"><ins id=\"aswift_8_anchor\"><iframe id=\"aswift_8\" src=\"https:\/\/googleads.g.doubleclick.net\/pagead\/ads?client=ca-pub-4318815816536903&amp;output=html&amp;h=280&amp;adk=2016488619&amp;adf=78968375&amp;pi=t.aa~a.408038455~i.40~rp.4&amp;w=777&amp;fwrn=4&amp;fwrnh=100&amp;lmt=1623050173&amp;num_ads=1&amp;rafmt=1&amp;armr=3&amp;sem=mc&amp;pwprc=9666130140&amp;psa=1&amp;ad_type=text_image&amp;format=777x280&amp;url=https%3A%2F%2Fvanbanphapluat.co%2Ftcvn-6285-1997-thep-cot-be-tong-thep-thanh-van&amp;flash=0&amp;fwr=0&amp;pra=3&amp;rh=194&amp;rw=776&amp;rpe=1&amp;resp_fmts=3&amp;wgl=1&amp;fa=27&amp;adsid=ChAI8If3hQYQ9YeVx8Gdo69yEkwAUgPS1N_wW6RulbIDxJzE5cXvPmD5OXnAnXP3nzTBSMbQp2mtwX3dYnlGPJXXI9oGu_4j6IN4oHxi09b2Wn4VxUkWsVUY1gUUQLxj&amp;uach=WyJXaW5kb3dzIiwiMTAuMCIsIng4NiIsIiIsIjkxLjAuNDQ3Mi43NyIsW11d&amp;dt=1623050172568&amp;bpp=1&amp;bdt=1244&amp;idt=1&amp;shv=r20210601&amp;cbv=%2Fr20190131&amp;ptt=9&amp;saldr=aa&amp;abxe=1&amp;cookie=ID%3D04a8e5bc6641345e-2208b71743c90059%3AT%3D1623041435%3ART%3D1623041435%3AS%3DALNI_MaSytZSsLDc0rd2gmtdT5yt-R3x9w&amp;prev_fmts=0x0%2C1140x280%2C374x280%2C374x280%2C777x280%2C777x280%2C777x280%2C1903x880&amp;nras=6&amp;correlator=2209900803822&amp;frm=20&amp;pv=1&amp;ga_vid=2110209687.1623041435&amp;ga_sid=1623050172&amp;ga_hid=1994776284&amp;ga_fc=0&amp;u_tz=420&amp;u_his=1&amp;u_java=0&amp;u_h=1080&amp;u_w=1920&amp;u_ah=1040&amp;u_aw=1920&amp;u_cd=24&amp;u_nplug=3&amp;u_nmime=4&amp;adx=362&amp;ady=3288&amp;biw=1903&amp;bih=880&amp;scr_x=0&amp;scr_y=0&amp;eid=42530671%2C44744331%2C21065725&amp;oid=3&amp;psts=AGkb-H9EjS5IghpVIFcNO4q5pHRJB6ZCtbz7jJIvBvkfzhelsxn-DiGr7Q3a5iQuC3S7nhbRZYHpCz2Q_xk&amp;pvsid=987718246934922&amp;pem=841&amp;ref=https%3A%2F%2Fwww.google.com.vn%2F&amp;eae=0&amp;fc=1408&amp;brdim=0%2C0%2C0%2C0%2C1920%2C0%2C1920%2C1040%2C1920%2C880&amp;vis=1&amp;rsz=%7C%7Cs%7C&amp;abl=NS&amp;fu=128&amp;bc=31&amp;jar=2021-06-07-07&amp;ifi=9&amp;uci=a!9&amp;btvi=5&amp;fsb=1&amp;xpc=gLAOSWzK3o&amp;p=https%3A\/\/vanbanphapluat.co&amp;dtd=459\" name=\"aswift_8\" width=\"777\" height=\"280\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" sandbox=\"allow-forms allow-popups allow-popups-to-escape-sandbox allow-same-origin allow-scripts allow-top-navigation-by-user-activation\" allowfullscreen=\"allowfullscreen\" data-google-container-id=\"a!9\" data-load-complete=\"true\" data-google-query-id=\"CLC50Ij9hPECFSpBwgUdXEoAHw\" data-mce-fragment=\"1\"><\/iframe><\/ins><\/ins><\/ins><\/div>\n<p><b>3.13. \u0110\u1ed9 ch\u00e9o c\u1ee7a g\u00e2n ngang,\u00a0<\/b><b>b<\/b>\u00a0: G\u00f3c gi\u1eefa g\u00e2n ngang v\u00e0 tr\u1ee5c d\u1ecdc c\u1ee7a thanh (xem h\u00ecnh 1, 3, 4 v\u00e0 5).<\/p>\n<p><b>4. K\u00edch th\u01b0\u1edbc, kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 dung sai<\/b><\/p>\n<p>K\u00edch th\u01b0\u1edbc, kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 dung sai \u0111\u01b0\u1ee3c n\u00eau trong b\u1ea3ng 1.<\/p>\n<p align=\"center\"><b>B\u1ea3ng 1 &#8211; K\u00edch th\u01b0\u1edbc, kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 dung sai<\/b><\/p>\n<table border=\"1\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td rowspan=\"2\" width=\"131\">\n<p align=\"center\"><b>\u0110\u01b0\u1eddng k\u00ednh danh ngh\u0129a\u00a0<sup>1)<\/sup><\/b><\/p>\n<p align=\"center\">mm<\/p>\n<\/td>\n<td rowspan=\"2\" width=\"162\">\n<p align=\"center\"><b>Di\u1ec7n t\u00edch m\u1eb7t c\u1eaft ngang danh ngh\u0129a<\/b><\/p>\n<p align=\"center\">mm<sup>2<\/sup><\/p>\n<\/td>\n<td colspan=\"2\" width=\"292\">\n<p align=\"center\"><b>Kh\u1ed1i l\u01b0\u1ee3ng theo chi\u1ec1u d\u00e0i<\/b><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td width=\"146\">\n<p align=\"center\"><b>Y\u00eau c\u1ea7u<\/b><\/p>\n<p align=\"center\">kg\/m<\/p>\n<\/td>\n<td width=\"146\">\n<p align=\"center\"><b>Dung sai\u00a0<sup>2)<\/sup><\/b><\/p>\n<p align=\"center\">%<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"131\">\n<p align=\"center\">6<\/p>\n<\/td>\n<td valign=\"top\" width=\"162\">\n<p align=\"center\">28,3<\/p>\n<\/td>\n<td valign=\"top\" width=\"146\">\n<p align=\"center\">0,222<\/p>\n<\/td>\n<td valign=\"top\" width=\"146\">\n<p align=\"center\">\u00b1\u00a08<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"131\">\n<p align=\"center\">8<\/p>\n<\/td>\n<td valign=\"top\" width=\"162\">\n<p align=\"center\">50,3<\/p>\n<\/td>\n<td valign=\"top\" width=\"146\">\n<p align=\"center\">0,395<\/p>\n<\/td>\n<td valign=\"top\" width=\"146\">\n<p align=\"center\">\u00b1\u00a08<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"131\">\n<p align=\"center\">10<\/p>\n<\/td>\n<td valign=\"top\" width=\"162\">\n<p align=\"center\">78,3<\/p>\n<\/td>\n<td valign=\"top\" width=\"146\">\n<p align=\"center\">0,617<\/p>\n<\/td>\n<td valign=\"top\" width=\"146\">\n<p align=\"center\">\u00b1\u00a05<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"131\">\n<p align=\"center\">12<\/p>\n<\/td>\n<td valign=\"top\" width=\"162\">\n<p align=\"center\">113<\/p>\n<\/td>\n<td valign=\"top\" width=\"146\">\n<p align=\"center\">0,888<\/p>\n<\/td>\n<td valign=\"top\" width=\"146\">\n<p align=\"center\">\u00b1\u00a05<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"131\">\n<p align=\"center\">16<\/p>\n<\/td>\n<td valign=\"top\" width=\"162\">\n<p align=\"center\">201<\/p>\n<\/td>\n<td valign=\"top\" width=\"146\">\n<p align=\"center\">1,58<\/p>\n<\/td>\n<td valign=\"top\" width=\"146\">\n<p align=\"center\">\u00b1\u00a05<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"131\">\n<p align=\"center\">20<\/p>\n<\/td>\n<td valign=\"top\" width=\"162\">\n<p align=\"center\">314<\/p>\n<\/td>\n<td valign=\"top\" width=\"146\">\n<p align=\"center\">2,47<\/p>\n<\/td>\n<td valign=\"top\" width=\"146\">\n<p align=\"center\">\u00b1\u00a05<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"131\">\n<p align=\"center\">25<\/p>\n<\/td>\n<td valign=\"top\" width=\"162\">\n<p align=\"center\">491<\/p>\n<\/td>\n<td valign=\"top\" width=\"146\">\n<p align=\"center\">3,85<\/p>\n<\/td>\n<td valign=\"top\" width=\"146\">\n<p align=\"center\">\u00b1\u00a04<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"131\">\n<p align=\"center\">32<\/p>\n<\/td>\n<td valign=\"top\" width=\"162\">\n<p align=\"center\">804<\/p>\n<\/td>\n<td valign=\"top\" width=\"146\">\n<p align=\"center\">6,31<\/p>\n<\/td>\n<td valign=\"top\" width=\"146\">\n<p align=\"center\">\u00b1\u00a04<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"131\">\n<p align=\"center\">40<\/p>\n<\/td>\n<td valign=\"top\" width=\"162\">\n<p align=\"center\">1256<\/p>\n<\/td>\n<td valign=\"top\" width=\"146\">\n<p align=\"center\">9,86<\/p>\n<\/td>\n<td valign=\"top\" width=\"146\">\n<p align=\"center\">\u00b1\u00a04<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"4\" valign=\"top\" width=\"584\">1) N\u1ebfu \u0111\u01b0\u1eddng k\u00ednh y\u00eau c\u1ea7u l\u1edbn h\u01a1n 40 mm th\u00ec k\u00edch th\u01b0\u1edbc s\u1ebd t\u0103ng theo t\u1eebng 5 mm. Dung sai \u0111\u1ed1i v\u1edbi c\u00e1c thanh n\u00e0y l\u00e0\u00a0\u00b1\u00a04 %.<\/p>\n<p>2) Dung sai \u0111\u1ed1i v\u1edbi m\u1ed9t thanh \u0111\u01a1n.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u0110\u1ed9 d\u00e0i cung c\u1ea5p ph\u1ea3i \u0111\u01b0\u1ee3c th\u1ecfa thu\u1eadn gi\u1eefa ng\u01b0\u1eddi s\u1ea3n xu\u1ea5t v\u00e0 kh\u00e1ch h\u00e0ng. Chi\u1ec1u d\u00e0i ti\u00eau chu\u1ea9n \u01b0u ti\u00ean c\u1ee7a thanh th\u1eb3ng l\u00e0 12 m ho\u1eb7c 18 m. Sai l\u1ec7ch cho ph\u00e9p c\u1ee7a chi\u1ec1u d\u00e0i trong x\u01b0\u1edfng c\u00e1n l\u00e0\u00a0<img decoding=\"async\" src=\"https:\/\/thuvienxaydung.com.vn\/wp-content\/uploads\/2021\/06\/1_image001.gif\" width=\"24\" height=\"25\" \/>mm.<\/p>\n<p><b>5. K\u00edch th\u01b0\u1edbc h\u00ecnh h\u1ecdc c\u1ee7a g\u00e2n<\/b><\/p>\n<p>C\u00e1c thanh th\u00e9p v\u1eabn ph\u1ea3i c\u00f3 c\u00e1c g\u00e2n ngang. C\u00e1c g\u00e2n d\u1ecdc l\u00e0 kh\u00f4ng b\u1eaft bu\u1ed9c.<\/p>\n<p>K\u00edch th\u01b0\u1edbc h\u00ecnh h\u1ecdc c\u1ee7a c\u00e1c g\u00e2n ph\u1ea3i \u0111\u1ea3m b\u1ea3o c\u00e1c thanh th\u00e9p c\u00f3 c\u00e1c t\u00ednh ch\u1ea5t b\u00e1m d\u00ednh t\u1ed1t \u0111\u1ec3 th\u1ecfa m\u00e3n ch\u1ee9c n\u0103ng c\u1ee7a ch\u00fang trong c\u00e1c k\u1ebft c\u1ea5u b\u00ea t\u00f4ng.<\/p>\n<p>C\u00e1c t\u00ednh ch\u1ea5t b\u00e1m d\u00ednh \u0111\u01b0\u1ee3c th\u1ecfa m\u00e3n n\u1ebfu c\u00f3 \u00edt nh\u1ea5t hai h\u00e0ng g\u00e2n ngang ph\u00e2n b\u1ed1 \u0111\u1ec1u \u0111\u1eb7n chung quanh chu vi. C\u00e1c g\u00e2n ngang trong h\u00e0ng ph\u1ea3i \u0111\u01b0\u1ee3c ph\u00e2n b\u1ed1 \u0111\u1ec1u \u0111\u1eb7n tr\u00ean to\u00e0n b\u1ed9 chi\u1ec1u d\u00e0i thanh tr\u1eeb v\u00f9ng ghi m\u00e1c.<\/p>\n<p>C\u00e1c y\u00eau c\u1ea7u v\u1ec1 k\u00edch th\u01b0\u1edbc h\u00ecnh h\u1ecdc c\u1ee7a g\u00e2n \u0111\u01b0\u1ee3c n\u00eau trong b\u1ea3ng 2.<\/p>\n<p align=\"center\"><b>B\u1ea3ng 2 &#8211; C\u00e1c y\u00eau c\u1ea7u v\u1ec1 k\u00edch th\u01b0\u1edbc h\u00ecnh h\u1ecdc c\u1ee7a g\u00e2n<\/b><\/p>\n<table border=\"1\" width=\"592\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td rowspan=\"2\" valign=\"top\" width=\"139\"><\/td>\n<td rowspan=\"2\" width=\"60\">\n<p align=\"center\"><b>\u0110\u01b0\u1eddng k\u00ednh D<\/b><\/p>\n<p align=\"center\">mm<\/p>\n<\/td>\n<td colspan=\"2\" valign=\"top\" width=\"216\">\n<p align=\"center\"><b>Thanh c\u00e1n n\u00f3ng<\/b><\/p>\n<\/td>\n<td colspan=\"2\" valign=\"top\" width=\"177\">\n<p align=\"center\"><b>Thanh xo\u1eafn<\/b><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td width=\"108\">\n<p align=\"center\"><b>G\u00e2n c\u00f3 chi\u1ec1u cao kh\u00f4ng \u0111\u1ed5i<\/b><\/p>\n<\/td>\n<td width=\"108\">\n<p align=\"center\"><b>G\u00e2n h\u00ecnh l\u01b0\u1ee1i li\u1ec1m<\/b><\/p>\n<\/td>\n<td colspan=\"2\" width=\"177\">\n<p align=\"center\"><b>G\u00e2n h\u00ecnh l\u01b0\u1ee1i li\u1ec1m<\/b><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"139\">Chi\u1ec1u cao c\u1ee7a g\u00e2n ngang, a. Nh\u1ecf nh\u1ea5t<\/td>\n<td width=\"60\">\n<p align=\"center\">T\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i<\/p>\n<\/td>\n<td width=\"108\">\n<p align=\"center\">0,05 D<\/p>\n<\/td>\n<td width=\"108\">\n<p align=\"center\">0,065 D<\/p>\n<\/td>\n<td width=\"84\">\n<p align=\"center\">0,052 D<\/p>\n<\/td>\n<td width=\"93\">\n<p align=\"center\">0,065 D<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"139\">Chi\u1ec1u cao c\u1ee7a g\u00e2n d\u1ecdc, a&#8217;. Nh\u1ecf nh\u1ea5t<\/td>\n<td width=\"60\">\n<p align=\"center\">T\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i<\/p>\n<\/td>\n<td width=\"108\">\n<p align=\"center\">&#8211;<\/p>\n<\/td>\n<td width=\"108\">\n<p align=\"center\">&#8211;<\/p>\n<\/td>\n<td colspan=\"2\" width=\"177\">\n<p align=\"center\">0,07 D<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"139\">B\u01b0\u1edbc g\u00e2n, c<\/td>\n<td width=\"60\">\n<p align=\"center\">6 \u0111\u1ebfn 8<\/p>\n<\/td>\n<td width=\"108\">\n<p align=\"center\">0,5 D \u0111\u1ebfn 0,7 D<\/p>\n<\/td>\n<td width=\"108\">\n<p align=\"center\">0,5 D \u0111\u1ebfn 1,0 D<\/p>\n<\/td>\n<td width=\"84\">\n<p align=\"center\">0,5 D \u0111\u1ebfn 1,0 D<\/p>\n<\/td>\n<td width=\"93\">\n<p align=\"center\">0,5 D \u0111\u1ebfn 1,2 D<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"139\">T\u1eeb nh\u1ecf nh\u1ea5t \u0111\u1ebfn l\u1edbn nh\u1ea5t<\/td>\n<td width=\"60\">\n<p align=\"center\">\u2265 10<\/p>\n<\/td>\n<td width=\"108\">\n<p align=\"center\">0,5 D \u0111\u1ebfn 0,7 D<\/p>\n<\/td>\n<td width=\"108\">\n<p align=\"center\">0,5 D \u0111\u1ebfn 0,8 D<\/p>\n<\/td>\n<td width=\"84\">\n<p align=\"center\">0,5 D \u0111\u1ebfn 0,8 D<\/p>\n<\/td>\n<td width=\"93\">\n<p align=\"center\">0,5 D \u0111\u1ebfn 1,0 D<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"139\">\u0110\u1ed9 xi\u00ean (nghi\u00eang) c\u1ee7a g\u00e2n ngang,\u00a0b, nh\u1ecf nh\u1ea5t<\/td>\n<td width=\"60\">\n<p align=\"center\">T\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i<\/p>\n<\/td>\n<td width=\"108\">\n<p align=\"center\">35\u00b0<\/p>\n<\/td>\n<td width=\"108\">\n<p align=\"center\">35\u00b0<\/p>\n<\/td>\n<td colspan=\"2\" width=\"177\">\n<p align=\"center\">35\u00b0<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"139\">Chu vi kh\u00f4ng c\u00f3 g\u00e2n ngang,\u00a0Sfi, nh\u1ecf nh\u1ea5t<\/td>\n<td width=\"60\">\n<p align=\"center\">T\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i<\/p>\n<\/td>\n<td width=\"108\">\n<p align=\"center\">&#8211;<\/p>\n<\/td>\n<td width=\"108\">\n<p align=\"center\">0,25 D<\/p>\n<\/td>\n<td colspan=\"2\" width=\"177\">\n<p align=\"center\">0,35 D<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"139\">B\u01b0\u1edbc danh ngh\u0129a, P<\/td>\n<td width=\"60\">\n<p align=\"center\">T\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i<\/p>\n<\/td>\n<td width=\"108\">\n<p align=\"center\">&#8211;<\/p>\n<\/td>\n<td width=\"108\">\n<p align=\"center\">&#8211;<\/p>\n<\/td>\n<td colspan=\"2\" width=\"177\">\n<p align=\"center\">10 D\u00a0\u00b1\u00a02 D<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>C\u00e1c k\u00edch th\u01b0\u1edbc x\u00e1c \u0111\u1ecbnh h\u00ecnh d\u1ea1ng c\u1ee7a g\u00e2n trong b\u1ea3ng 2 \u0111\u01b0\u1ee3c mi\u00eau t\u1ea3 tr\u00ean h\u00ecnh 1 \u0111\u1ebfn h\u00ecnh 5.<\/p>\n<p align=\"center\"><img decoding=\"async\" src=\"https:\/\/thuvienxaydung.com.vn\/wp-content\/uploads\/2021\/06\/1_image002.jpg\" width=\"254\" height=\"89\" \/><\/p>\n<p align=\"center\"><b>H\u00ecnh 1 &#8211; Thanh th\u00e9p v\u1eb1n &#8211; \u0110\u1ecbnh ngh\u0129a c\u00e1c h\u00ecnh d\u1ea1ng<\/b><\/p>\n<p align=\"center\"><img decoding=\"async\" src=\"https:\/\/thuvienxaydung.com.vn\/wp-content\/uploads\/2021\/06\/1_image003.jpg\" width=\"185\" height=\"104\" \/><\/p>\n<p align=\"center\"><b>H\u00ecnh 2 &#8211; \u0110\u1ed9 nghi\u00eang c\u1ea1nh c\u1ee7a g\u00e2n,\u00a0<\/b><b>a<\/b><b>\u00a0v\u00e0 chi\u1ec1u cao c\u1ee7a g\u00e2n a, m\u1eb7t c\u1eaft A &#8211; A c\u1ee7a h\u00ecnh 1<\/b><\/p>\n<p align=\"center\"><img decoding=\"async\" src=\"https:\/\/thuvienxaydung.com.vn\/wp-content\/uploads\/2021\/06\/1_image004.jpg\" width=\"239\" height=\"199\" \/><\/p>\n<p align=\"center\"><b>H\u00ecnh 3 &#8211; V\u00ed d\u1ee5 v\u1ec1 thanh kh\u00f4ng xo\u1eafn v\u1edbi c\u00e1c g\u00e2n thay \u0111\u1ed5i \u0111\u1ed9 xi\u00ean (nghi\u00eang) theo tr\u1ee5c d\u1ecdc<\/b><\/p>\n<p align=\"center\"><img decoding=\"async\" src=\"https:\/\/thuvienxaydung.com.vn\/wp-content\/uploads\/2021\/06\/1_image005.jpg\" width=\"224\" height=\"102\" \/><\/p>\n<p align=\"center\"><b>H\u00ecnh 4 &#8211; V\u00ed d\u1ee5 v\u1ec1 thanh kh\u00f4ng xo\u1eafn v\u1edbi c\u00e1c g\u00e2n ngang c\u00f3 chi\u1ec1u cao kh\u00f4ng \u0111\u1ed5i (<\/b><b>b<\/b><b>\u00a0= 90<sup>o<\/sup>)<\/b><\/p>\n<p align=\"center\"><img decoding=\"async\" src=\"https:\/\/thuvienxaydung.com.vn\/wp-content\/uploads\/2021\/06\/image006.jpg\" width=\"248\" height=\"70\" \/><\/p>\n<p align=\"center\"><b>H\u00ecnh 5 &#8211; Thanh xo\u1eafn v\u1edbi c\u00e1c g\u00e2n ch\u00e9o<\/b><\/p>\n<p>B\u01b0\u1edbc g\u00e2n ph\u1ea3i l\u1ea5y gi\u00e1 tr\u1ecb trung b\u00ecnh \u0111o theo t\u1eebng b\u01b0\u1edbc<\/p>\n<p><b>6. Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc<\/b><\/p>\n<p>H\u00e0m l\u01b0\u1ee3ng c\u00e1c nguy\u00ean t\u1ed1 kh\u00f4ng \u0111\u01b0\u1ee3c l\u1edbn h\u01a1n gi\u00e1 tr\u1ecb n\u00eau trong b\u1ea3ng 3.<\/p>\n<p align=\"center\"><b>B\u1ea3ng 3 &#8211; Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc &#8211; Gi\u00e1 tr\u1ecb l\u1edbn nh\u1ea5t t\u00ednh b\u1eb1ng ph\u1ea7n tr\u0103m kh\u1ed1i l\u01b0\u1ee3ng<\/b><\/p>\n<table border=\"1\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td width=\"81\">\n<p align=\"center\"><b>M\u00e1c th\u00e9p<\/b><\/p>\n<\/td>\n<td width=\"65\">\n<p align=\"center\">C<sup>1)<\/sup><\/p>\n<\/td>\n<td width=\"73\">\n<p align=\"center\">Si<\/p>\n<\/td>\n<td width=\"73\">\n<p align=\"center\">Mn<\/p>\n<\/td>\n<td width=\"74\">\n<p align=\"center\">P<\/p>\n<\/td>\n<td width=\"74\">\n<p align=\"center\">S<\/p>\n<\/td>\n<td width=\"74\">\n<p align=\"center\">N<sup>2)<\/sup><\/p>\n<\/td>\n<td width=\"73\">\n<p align=\"center\">C<sub>dl<\/sub><sup>1)<\/sup><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"81\">\n<p align=\"center\">RB 300<\/p>\n<\/td>\n<td valign=\"top\" width=\"65\">\n<p align=\"center\">\n<\/td>\n<td valign=\"top\" width=\"73\">\n<p align=\"center\">\n<\/td>\n<td valign=\"top\" width=\"73\">\n<p align=\"center\">\n<\/td>\n<td valign=\"top\" width=\"74\">\n<p align=\"center\">\n<\/td>\n<td valign=\"top\" width=\"74\">\n<p align=\"center\">\n<\/td>\n<td valign=\"top\" width=\"74\">\n<p align=\"center\">\n<\/td>\n<td valign=\"top\" width=\"73\">\n<p align=\"center\">\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"81\">\n<p align=\"center\">RB 400<\/p>\n<\/td>\n<td valign=\"top\" width=\"65\">\n<p align=\"center\">&#8211;<\/p>\n<\/td>\n<td valign=\"top\" width=\"73\">\n<p align=\"center\">&#8211;<\/p>\n<\/td>\n<td valign=\"top\" width=\"73\">\n<p align=\"center\">&#8211;<\/p>\n<\/td>\n<td valign=\"top\" width=\"74\">\n<p align=\"center\">0,060<\/p>\n<\/td>\n<td valign=\"top\" width=\"74\">\n<p align=\"center\">0,060<\/p>\n<\/td>\n<td valign=\"top\" width=\"74\">\n<p align=\"center\">&#8211;<\/p>\n<\/td>\n<td valign=\"top\" width=\"73\">\n<p align=\"center\">&#8211;<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"81\">\n<p align=\"center\">RB 500<\/p>\n<\/td>\n<td valign=\"top\" width=\"65\">\n<p align=\"center\">\n<\/td>\n<td valign=\"top\" width=\"73\">\n<p align=\"center\">\n<\/td>\n<td valign=\"top\" width=\"73\">\n<p align=\"center\">\n<\/td>\n<td valign=\"top\" width=\"74\">\n<p align=\"center\">(0,070)<\/p>\n<\/td>\n<td valign=\"top\" width=\"74\">\n<p align=\"center\">(0,070)<\/p>\n<\/td>\n<td valign=\"top\" width=\"74\">\n<p align=\"center\">\n<\/td>\n<td valign=\"top\" width=\"73\">\n<p align=\"center\">\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"81\">\n<p align=\"center\">RB 400W<\/p>\n<\/td>\n<td valign=\"top\" width=\"65\">\n<p align=\"center\">0,22<\/p>\n<\/td>\n<td valign=\"top\" width=\"73\">\n<p align=\"center\">0,60<\/p>\n<\/td>\n<td valign=\"top\" width=\"73\">\n<p align=\"center\">1,60<\/p>\n<\/td>\n<td valign=\"top\" width=\"74\">\n<p align=\"center\">0,050<\/p>\n<\/td>\n<td valign=\"top\" width=\"74\">\n<p align=\"center\">0,050<\/p>\n<\/td>\n<td valign=\"top\" width=\"74\">\n<p align=\"center\">0,012<\/p>\n<\/td>\n<td valign=\"top\" width=\"73\">\n<p align=\"center\">0,50<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"81\">\n<p align=\"center\">RB 500W<\/p>\n<\/td>\n<td valign=\"top\" width=\"65\">\n<p align=\"center\">(0,24)<sup>3)<\/sup><\/p>\n<\/td>\n<td valign=\"top\" width=\"73\">\n<p align=\"center\">(0,65)<\/p>\n<\/td>\n<td valign=\"top\" width=\"73\">\n<p align=\"center\">(1,70)<\/p>\n<\/td>\n<td valign=\"top\" width=\"74\">\n<p align=\"center\">(0,055)<\/p>\n<\/td>\n<td valign=\"top\" width=\"74\">\n<p align=\"center\">(0,055)<\/p>\n<\/td>\n<td valign=\"top\" width=\"74\">\n<p align=\"center\">(0,013)<\/p>\n<\/td>\n<td valign=\"top\" width=\"73\">\n<p align=\"center\">(0,52)<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"8\" valign=\"top\" width=\"584\">1) \u0110\u1ed1i v\u1edbi c\u00e1c m\u00e1c th\u00e9p RB 400W v\u00e0 RB 500W v\u1edbi \u0111\u01b0\u1eddng k\u00ednh l\u1edbn h\u01a1n 32 mm th\u00ec h\u00e0m l\u01b0\u1ee3ng c\u00e1c bon l\u1edbn nh\u1ea5t (C) l\u00e0 0,25% (0,27%) v\u00e0 \u0111\u01b0\u01a1ng l\u01b0\u1ee3ng c\u00e1c bon l\u1edbn nh\u1ea5t (Cdi) l\u00e0 0,55% (0,57%).<\/p>\n<p>2) H\u00e0m l\u01b0\u1ee3ng nit\u01a1 c\u00f3 th\u1ec3 cao h\u01a1n n\u1ebfu trong th\u00e9p c\u00f3 \u0111\u1ee7 c\u00e1c nguy\u00ean t\u1ed1 li\u00ean k\u1ebft v\u1edbi nit\u01a1.<\/p>\n<p>3) C\u00e1c gi\u00e1 tr\u1ecb trong d\u1ea5u ngo\u1eb7c \u0111\u01a1n d\u00f9ng cho ph\u00e2n t\u00edch s\u1ea3n ph\u1ea9m.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u0110\u01b0\u01a1ng l\u01b0\u1ee3ng c\u00e1c bon C<sub>di<\/sub>\u00a0\u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00f4ng th\u1ee9c<\/p>\n<p>Cdll = C + + \u00a0+<\/p>\n<p>trong \u0111\u00f3\u00a0\u00a0\u00a0<i>C, Mn, Cr, V, Mo,<\/i>\u00a0<i>Cu<\/i>\u00a0v\u00e0\u00a0<i>Ni<\/i>\u00a0l\u00e0 ph\u1ea7n tr\u0103m kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a c\u00e1c nguy\u00ean t\u1ed1 trong th\u00e9p.<\/p>\n<p><b>7. T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc<\/b><\/p>\n<p><b>7.1. T\u00ednh ch\u1ea5t th\u1eed k\u00e9o<\/b><\/p>\n<p>C\u00e1c t\u00ednh ch\u1ea5t th\u1eed k\u00e9o y\u00eau c\u1ea7u cho c\u00e1c lo\u1ea1i th\u00e9p \u0111\u01b0\u1ee3c n\u00eau trong b\u1ea3ng 4.<\/p>\n<p align=\"center\"><b>B\u1ea3ng 4 &#8211; C\u00e1c gi\u00e1 tr\u1ecb \u0111\u1eb7c tr\u01b0ng c\u1ee7a gi\u1edbi h\u1ea1n ch\u1ea3y tr\u00ean, gi\u1edbi h\u1ea1n b\u1ec1n k\u00e9o v\u00e0 \u0111\u1ed9 d\u00e3n d\u00e0i sau \u0111\u1ee9t<\/b><\/p>\n<table border=\"1\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td width=\"148\">\n<p align=\"center\"><b>M\u00e1c th\u00e9p<\/b><\/p>\n<\/td>\n<td width=\"148\">\n<p align=\"center\"><b>Gi\u1edbi h\u1ea1n ch\u1ea3y tr\u00ean<\/b><\/p>\n<p align=\"center\"><b>R<sub>eH<\/sub><\/b><\/p>\n<p align=\"center\">N\/mm<sup>2<\/sup><\/p>\n<\/td>\n<td width=\"148\">\n<p align=\"center\"><b>Gi\u1edbi h\u1ea1n b\u1ec1n k\u00e9o<\/b><\/p>\n<p align=\"center\"><b>R<sub>m<\/sub><\/b><\/p>\n<p align=\"center\">N\/mm<sup>2<\/sup><\/p>\n<\/td>\n<td width=\"148\">\n<p align=\"center\"><b>\u0110\u1ed9 d\u00e3n d\u00e0i<\/b><\/p>\n<p align=\"center\"><b>A<sub>5,65<\/sub><\/b><\/p>\n<p align=\"center\">%<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"148\">\n<p align=\"center\">RB 300<\/p>\n<\/td>\n<td valign=\"top\" width=\"148\">\n<p align=\"center\">300<\/p>\n<\/td>\n<td valign=\"top\" width=\"148\">\n<p align=\"center\">330<\/p>\n<\/td>\n<td valign=\"top\" width=\"148\">\n<p align=\"center\">16<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"148\">\n<p align=\"center\"><b><img decoding=\"async\" src=\"https:\/\/thuvienxaydung.com.vn\/wp-content\/uploads\/2021\/06\/1_image007.gif\" width=\"72\" height=\"48\" \/><\/b><\/p>\n<\/td>\n<td width=\"148\">\n<p align=\"center\">400<\/p>\n<\/td>\n<td width=\"148\">\n<p align=\"center\">440<\/p>\n<\/td>\n<td width=\"148\">\n<p align=\"center\">14<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"148\">\n<p align=\"center\"><b><img decoding=\"async\" src=\"https:\/\/thuvienxaydung.com.vn\/wp-content\/uploads\/2021\/06\/2_image008.gif\" width=\"72\" height=\"48\" \/><\/b><\/p>\n<\/td>\n<td width=\"148\">\n<p align=\"center\">500<\/p>\n<\/td>\n<td width=\"148\">\n<p align=\"center\">550<\/p>\n<\/td>\n<td width=\"148\">\n<p align=\"center\">14<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u00cdt nh\u1ea5t 95% s\u1ed1 l\u1ea7n th\u1eed ph\u1ea3i c\u00f3 c\u00e1c t\u00ednh ch\u1ea5t th\u1eed k\u00e9o b\u1eb1ng ho\u1eb7c l\u1edbn h\u01a1n gi\u00e1 tr\u1ecb \u0111\u1eb7c tr\u01b0ng ghi trong b\u1ea3ng 4.<\/p>\n<p>N\u1ebfu ng\u01b0\u1eddi s\u1ea3n xu\u1ea5t v\u00e0 kh\u00e1ch h\u00e0ng th\u1ecfa thu\u1eadn th\u00ec c\u00e1c gi\u00e1 tr\u1ecb trong b\u1ea3ng 4 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c coi nh\u01b0 nh\u1eefng gi\u00e1 tr\u1ecb nh\u1ecf nh\u1ea5t \u0111\u01b0\u1ee3c \u0111\u1ea3m b\u1ea3o.<\/p>\n<p>T\u1ef7 s\u1ed1 gi\u1eefa gi\u1edbi h\u1ea1n b\u1ec1n k\u00e9o v\u00e0 gi\u1edbi h\u1ea1n ch\u1ea3y \u0111\u1ed1i v\u1edbi m\u1ecdi m\u1eabu \u00edt nh\u1ea5t ph\u1ea3i b\u1eb1ng 1,05.<\/p>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c s\u1ea3n ph\u1ea9m th\u1eed th\u00ec \u0111\u1ed9 d\u00e3n d\u00e0i t\u01b0\u01a1ng \u0111\u1ed1i \u1ee9ng v\u1edbi l\u1ef1c l\u1edbn nh\u1ea5t, Agt, ph\u1ea3i b\u1eb1ng ho\u1eb7c l\u1edbn h\u01a1n 2,5%.<\/p>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c th\u00e9p kh\u00f4ng c\u00f3 gi\u1edbi h\u1ea1n ch\u1ea3y r\u00f5 r\u1ec7t th\u00ec gi\u1edbi h\u1ea1n ch\u1ea3y quy \u01b0\u1edbc, R<sub>p0,2<\/sub>, ph\u1ea3i \u0111\u01b0\u1ee3c d\u00f9ng thay cho gi\u1edbi h\u1ea1n ch\u1ea3y.<\/p>\n<p><b>7.2. T\u00ednh ch\u1ea5t u\u1ed1n<\/b><\/p>\n<p>Sau khi th\u1eed c\u00e1c m\u1eabu kh\u00f4ng \u0111\u01b0\u1ee3c g\u1eaby hay r\u1ea1n n\u1ee9t c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y b\u1eb1ng m\u1eaft th\u01b0\u1eddng.<\/p>\n<p><b>7.3. T\u00ednh ch\u1ea5t u\u1ed1n l\u1ea1i<\/b><\/p>\n<p>N\u1ebfu ng\u01b0\u1eddi s\u1ea3n xu\u1ea5t v\u00e0 kh\u00e1ch h\u00e0ng th\u1ecfa thu\u1eadn th\u00ec ph\u00e9p th\u1eed u\u1ed1n l\u1ea1i c\u00f3 th\u1ec3 thay th\u1ebf cho ph\u00e9p th\u1eed u\u1ed1n \u0111\u1ed1i v\u1edbi c\u00e1c th\u00e9p RB 400, RB 400W, RB 500 v\u00e0 RB 500W.<\/p>\n<p>Ph\u00e9p th\u1eed u\u1ed1n l\u1ea1i d\u00f9ng \u0111\u1ec3 ki\u1ec3m tra c\u00e1c t\u00ednh ch\u1ea5t h\u00f3a gi\u00e0 c\u1ee7a thanh \u0111\u01b0\u1ee3c u\u1ed1n.<\/p>\n<p>Sau khi th\u1eed, c\u00e1c m\u1eabu kh\u00f4ng \u0111\u01b0\u1ee3c g\u1eaby ho\u1eb7c r\u1ea1n n\u1ee9t c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y b\u1eb1ng m\u1eaft th\u01b0\u1eddng.<\/p>\n<p><b>7.4. T\u00ednh ch\u1ea5t m\u1ecfi<\/b><\/p>\n<p>N\u1ebfu kh\u00e1ch h\u00e0ng y\u00eau c\u1ea7u th\u00ec ng\u01b0\u1eddi s\u1ea3n xu\u1ea5t ph\u1ea3i ki\u1ec3m tra c\u00e1c t\u00ednh ch\u1ea5t m\u1ecfi c\u1ee7a s\u1ea3n ph\u1ea9m.<\/p>\n<p><b>8. Th\u1eed c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc<\/b><\/p>\n<p><b>8.1. Th\u1eed k\u00e9o<\/b><\/p>\n<p>Th\u1eed k\u00e9o ph\u1ea3i th\u1ef1c hi\u1ec7n theo ISO 6892.<\/p>\n<p>\u0110\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 d\u00e3n d\u00e0i sau \u0111\u1ee9t, chi\u1ec1u d\u00e0i ban \u0111\u1ea7u c\u1ee7a m\u1eabu ph\u1ea3i b\u1eb1ng 5 l\u1ea7n \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a.<\/p>\n<p>Ph\u1ea3i d\u00f9ng di\u1ec7n t\u00edch m\u1eb7t c\u1eaft ngang danh ngh\u0129a \u0111\u1ec3 t\u00ednh c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc.<\/p>\n<p><b>8.2. Th\u1eed u\u1ed1n<\/b><\/p>\n<p>Th\u1eed u\u1ed1n ph\u1ea3i th\u1ef1c hi\u1ec7n theo TCVN 6287 : 1997.<\/p>\n<p>M\u1eabu th\u1eed ph\u1ea3i \u0111\u01b0\u1ee3c u\u1ed1n m\u1ed9t g\u00f3c t\u1eeb 160\u00b0\u00a0\u0111\u1ebfn 180\u00b0<sup>\u00a0<\/sup>tr\u00ean m\u1ed9t g\u1ed1i u\u1ed1n c\u00f3 \u0111\u01b0\u1eddng k\u00ednh \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh trong b\u1ea3ng 5.<\/p>\n<p align=\"center\"><b>B\u1ea3ng 5 &#8211; \u0110\u01b0\u1eddng k\u00ednh g\u1ed1i u\u1ed1n d\u00f9ng cho th\u1eed u\u1ed1n<\/b><\/p>\n<p align=\"right\">K\u00edch th\u01b0\u1edbc t\u00ednh b\u1eb1ng milim\u00e9t<\/p>\n<table border=\"1\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td width=\"143\"><b>\u0110\u01b0\u1eddng k\u00ednh danh ngh\u0129a c\u1ee7a thanh\u00a0<sup>1)<\/sup><\/b><\/td>\n<td width=\"49\">\n<p align=\"center\">6<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">8<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">10<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">12<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">16<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">20<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">25<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">32<\/p>\n<\/td>\n<td width=\"46\">\n<p align=\"center\">40<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td width=\"143\"><b>Lo\u1ea1i th\u00e9p<\/b><\/td>\n<td width=\"49\">\n<p align=\"center\">\n<\/td>\n<td width=\"49\">\n<p align=\"center\">\n<\/td>\n<td width=\"49\">\n<p align=\"center\">\n<\/td>\n<td width=\"49\">\n<p align=\"center\">\n<\/td>\n<td width=\"49\">\n<p align=\"center\">\n<\/td>\n<td width=\"49\">\n<p align=\"center\">\n<\/td>\n<td width=\"49\">\n<p align=\"center\">\n<\/td>\n<td width=\"49\">\n<p align=\"center\">\n<\/td>\n<td width=\"46\">\n<p align=\"center\">\n<\/td>\n<\/tr>\n<tr>\n<td width=\"143\">RB 300<\/td>\n<td width=\"49\">\n<p align=\"center\">12,5<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">16<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">20<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">32<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">50<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">63<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">100<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">125<\/p>\n<\/td>\n<td width=\"46\">\n<p align=\"center\">160<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td width=\"143\">RB 400<\/p>\n<p>RB 400W<\/td>\n<td width=\"49\">\n<p align=\"center\">16<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">20<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">25<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">40<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">63<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">80<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">125<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">160<\/p>\n<\/td>\n<td width=\"46\">\n<p align=\"center\">200<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td width=\"143\">RB 500<\/p>\n<p>RB 500W<\/td>\n<td width=\"49\">\n<p align=\"center\">20<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">25<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">32<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">50<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">80<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">100<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">160<\/p>\n<\/td>\n<td width=\"49\">\n<p align=\"center\">200<\/p>\n<\/td>\n<td width=\"46\">\n<p align=\"center\">250<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"10\" width=\"584\">1) \u0110\u1ed1i v\u1edbi c\u00e1c thanh c\u00f3 \u0111\u01b0\u1eddng k\u00ednh l\u1edbn h\u01a1n 40 mm th\u00ec \u0111\u01b0\u1eddng k\u00ednh g\u1ed1i u\u1ed1n ph\u1ea3i \u0111\u01b0\u1ee3c th\u1ecfa thu\u1eadn gi\u1eefa ng\u01b0\u1eddi s\u1ea3n xu\u1ea5t v\u00e0 kh\u00e1ch h\u00e0ng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><b>8.3. Th\u1eed u\u1ed1n l\u1ea1i kh\u00f4ng ho\u00e0n to\u00e0n<\/b><\/p>\n<p>Th\u1eed u\u1ed1n l\u1ea1i kh\u00f4ng ho\u00e0n to\u00e0n ph\u1ea3i \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n theo TCVN 6287 : 1997.<\/p>\n<p>M\u1eabu th\u1eed ph\u1ea3i \u0111\u01b0\u1ee3c u\u1ed1n tr\u00ean m\u1ed9t g\u1ed1i u\u1ed1n c\u00f3 \u0111\u01b0\u1eddng k\u00ednh \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh trong b\u1ea3ng 6.<\/p>\n<p align=\"center\"><b>B\u1ea3ng 6 &#8211; \u0110\u01b0\u1eddng k\u00ednh g\u1ed1i u\u1ed1n d\u00f9ng \u0111\u1ec3 th\u1eed u\u1ed1n l\u1ea1i kh\u00f4ng ho\u00e0n to\u00e0n<\/b><\/p>\n<table border=\"1\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td width=\"163\"><b>\u0110\u01b0\u1eddng k\u00ednh danh ngh\u0129a c\u1ee7a thanh<\/b><\/td>\n<td width=\"48\">\n<p align=\"center\">6<\/p>\n<\/td>\n<td width=\"48\">\n<p align=\"center\">8<\/p>\n<\/td>\n<td width=\"48\">\n<p align=\"center\">10<\/p>\n<\/td>\n<td width=\"48\">\n<p align=\"center\">12<\/p>\n<\/td>\n<td width=\"48\">\n<p align=\"center\">16<\/p>\n<\/td>\n<td width=\"48\">\n<p align=\"center\">20<\/p>\n<\/td>\n<td width=\"48\">\n<p align=\"center\">25<\/p>\n<\/td>\n<td width=\"48\">\n<p align=\"center\">32<\/p>\n<\/td>\n<td width=\"43\">\n<p align=\"center\">40<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td width=\"163\"><b>Lo\u1ea1i th\u00e9p<\/b><\/p>\n<p>RB 400<\/p>\n<p>RB 400W<\/p>\n<p>RB 500<\/p>\n<p>RB 400W<\/td>\n<td width=\"48\">\n<p align=\"center\">32<\/p>\n<\/td>\n<td width=\"48\">\n<p align=\"center\">40<\/p>\n<\/td>\n<td width=\"48\">\n<p align=\"center\">50<\/p>\n<\/td>\n<td width=\"48\">\n<p align=\"center\">63<\/p>\n<\/td>\n<td width=\"48\">\n<p align=\"center\">100<\/p>\n<\/td>\n<td width=\"48\">\n<p align=\"center\">160<\/p>\n<\/td>\n<td width=\"48\">\n<p align=\"center\">200<\/p>\n<\/td>\n<td width=\"48\">\n<p align=\"center\">320<\/p>\n<\/td>\n<td width=\"43\">\n<p align=\"center\">400<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><b>9. K\u00fd hi\u1ec7u<\/b><\/p>\n<p>Theo ti\u00eau chu\u1ea9n n\u00e0y, c\u00e1c thanh th\u00e9p v\u1eabn ph\u1ea3i \u0111\u01b0\u1ee3c k\u00fd hi\u1ec7u theo th\u1ee9 t\u1ef1 sau \u0111\u00e2y:<\/p>\n<p>&#8211; th\u00e9p l\u00e0m c\u1ed1t b\u00ea t\u00f4ng;<\/p>\n<p>&#8211; s\u1ed1 hi\u1ec7u c\u1ee7a ti\u00eau chu\u1ea9n n\u00e0y;<\/p>\n<p>&#8211; \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a t\u00ednh b\u1eb1ng milim\u00e9t theo b\u1ea3ng 1;<\/p>\n<p>&#8211; lo\u1ea1i th\u00e9p.<\/p>\n<p>V\u00ed d\u1ee5: Th\u00e9p c\u1ed1t b\u00ea t\u00f4ng TCVN 6285 : 1997 (ISO 6935 &#8211; 2 : 1991) &#8211; 16 RB 500W.<\/p>\n<p><b>10. Ghi m\u00e1c<\/b><\/p>\n<p><b>10.1. Ghi m\u00e1c l\u00ean thanh th\u00e9p<\/b><\/p>\n<p>T\u1ea5t c\u1ea3 c\u00e1c thanh th\u00e9p \u0111\u1ec1u ph\u1ea3i \u0111\u01b0\u1ee3c ghi m\u00e1c trong qu\u00e1 tr\u00ecnh c\u00e1n \u0111\u1ec3 ch\u1ec9 ra:<\/p>\n<p>&#8211; lo\u1ea1i th\u00e9p<\/p>\n<p>&#8211; t\u00ean c\u1ee7a ng\u01b0\u1eddi s\u1ea3n xu\u1ea5t.<\/p>\n<p>M\u1ed9t s\u1ed1 v\u00ed d\u1ee5 v\u1ec1 c\u00e1c h\u1ec7 th\u1ed1ng ghi m\u00e1c \u0111a qu\u1ed1c gia \u0111\u01b0\u1ee3c n\u00eau ra \u1edf ph\u1ee5 l\u1ee5c A.<\/p>\n<p><b>10.2. Ghi m\u00e1c c\u00e1c b\u00f3 th\u00e9p<\/b><\/p>\n<p>M\u1ed7i m\u1ed9t b\u00f3 th\u00e9p kh\u1ed1i l\u01b0\u1ee3ng kh\u00f4ng nh\u1ecf h\u01a1n 500 kg ph\u1ea3i c\u00f3 m\u1ed9t nh\u00e3n ghi t\u00ean ng\u01b0\u1eddi s\u1ea3n xu\u1ea5t, s\u1ed1 hi\u1ec7u c\u1ee7a ti\u00eau chu\u1ea9n n\u00e0y, lo\u1ea1i th\u00e9p, \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a, s\u1ed1 c\u1ee7a m\u1ebb n\u1ea5u ho\u1eb7c c\u00e1c s\u1ed1 li\u1ec7u c\u00f3 li\u00ean quan \u0111\u1ebfn c\u00e1c ph\u00e9p th\u1eed v\u00e0 t\u00ean c\u1ee7a n\u01b0\u1edbc s\u1ea3n xu\u1ea5t.<\/p>\n<p><b>11. Ch\u1ee9ng nh\u1eadn v\u00e0 ki\u1ec3m tra<\/b><\/p>\n<p>Ch\u1ee9ng nh\u1eadn v\u00e0 ki\u1ec3m tra th\u00e9p c\u1ed1t b\u00ea t\u00f4ng ph\u1ea3i \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n<\/p>\n<p>&#8211; theo m\u1ed9t h\u1ec7 th\u1ed1ng ch\u1ee9ng nh\u1eadn do m\u1ed9t c\u01a1 quan ngo\u00e0i gi\u00e1m s\u00e1t.<\/p>\n<p>ho\u1eb7c<\/p>\n<p>&#8211; theo m\u1ed9t ph\u00e9p th\u1eed c\u1ee7a vi\u1ec7c cung c\u1ea5p \u0111\u1eb7c bi\u1ec7t.<\/p>\n<p><b>11.1. H\u1ec7 th\u1ed1ng ch\u1ee9ng nh\u1eadn<\/b><\/p>\n<p>Trong tr\u01b0\u1eddng h\u1ee3p ch\u1ec9 c\u00f3 m\u1ed9t h\u1ec7 th\u1ed1ng ch\u1ee9ng nh\u1eadn th\u00ec vi\u1ec7c ch\u1ee9ng nh\u1eadn v\u00e0 ki\u1ec3m tra ph\u1ea3i \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n theo ISO 10144.<\/p>\n<p><b>11.2. Th\u1eed c\u1ee7a vi\u1ec7c cung c\u1ea5p \u0111\u1eb7c bi\u1ec7t<\/b><\/p>\n<p>C\u00e1c \u0111i\u1ec1u kho\u1ea3n li\u00ean quan \u0111\u1ebfn b\u1ea3n ch\u1ea5t, ph\u1ea1m vi v\u00e0 \u0111\u00e1nh gi\u00e1 c\u1ee7a c\u00e1c ph\u00e9p th\u1eed ch\u1ea5p nh\u1eadn v\u1ec1 vi\u1ec7c cung c\u1ea5p th\u00e9p l\u00e0m c\u1ed1t b\u00ea t\u00f4ng kh\u00f4ng ph\u1ea3i l\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee7a m\u1ed9t h\u1ec7 th\u1ed1ng ch\u1ee9ng nh\u1eadn \u0111\u01b0\u1ee3c n\u00eau trong 11.3 v\u00e0 11.4.<\/p>\n<p>Ph\u00e9p th\u1eed c\u1ee7a vi\u1ec7c cung c\u1ea5p \u0111\u1eb7c bi\u1ec7t ph\u1ea3i \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n theo 11.3.<\/p>\n<p>N\u1ebfu ng\u01b0\u1eddi s\u1ea3n xu\u1ea5t v\u00e0 kh\u00e1ch h\u00e0ng th\u1ecfa thu\u1eadn th\u00ec c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng 11.4.<\/p>\n<p><b>11.3. Ki\u1ec3m tra c\u00e1c gi\u00e1 tr\u1ecb \u0111\u1eb7c tr\u01b0ng<\/b><\/p>\n<p><b>11.3.1. T\u1ed5 ch\u1ee9c<\/b><\/p>\n<p>C\u00e1c ph\u00e9p th\u1eed ph\u1ea3i \u0111\u01b0\u1ee3c t\u1ed5 ch\u1ee9c v\u00e0 th\u1ef1c hi\u1ec7n theo th\u1ecfa thu\u1eadn gi\u1eefa kh\u00e1ch h\u00e0ng v\u00e0 ng\u01b0\u1eddi s\u1ea3n xu\u1ea5t, c\u00f3 xem x\u00e9t \u0111\u1ebfn c\u00e1c lu\u1eadt l\u1ec7 qu\u1ed1c gia c\u1ee7a n\u01b0\u1edbc mua h\u00e0ng.<\/p>\n<p><b>11.3.2. Ph\u1ea1m vi l\u1ea5y m\u1eabu v\u00e0 th\u1eed<\/b><\/p>\n<p>\u0110\u1ec3 th\u1eed ph\u1ea3i ph\u00e2n chia l\u00f4 h\u00e0ng chu\u1ea9n b\u1ecb cung c\u1ea5p th\u00e0nh c\u00e1c l\u00f4 th\u1eed v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng l\u1edbn nh\u1ea5t l\u00e0 50 t\u1ea5n ho\u1eb7c m\u1ed9t ph\u1ea7n c\u1ee7a n\u00f3. M\u1ed7i m\u1ed9t l\u00f4 th\u1eed ph\u1ea3i bao g\u1ed3m c\u00e1c s\u1ea3n ph\u1ea9m c\u00f9ng m\u1ed9t lo\u1ea1i th\u00e9p v\u00e0 c\u00f9ng \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t t\u1eeb m\u1ed9t m\u1ebb n\u1ea5u. Ng\u01b0\u1eddi s\u1ea3n xu\u1ea5t ph\u1ea3i kh\u1eb3ng \u0111\u1ecbnh trong b\u00e1o c\u00e1o th\u1eed r\u1eb1ng t\u1ea5t c\u1ea3 c\u00e1c m\u1eabu trong l\u00f4 th\u1eed \u0111\u01b0\u1ee3c l\u1ea5y t\u1eeb m\u1ed9t m\u1ebb n\u1ea5u. Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc (ph\u00e2n t\u00edch \u0111\u00fac) \u0111\u01b0\u1ee3c n\u00eau ra trong b\u00e1o c\u00e1o th\u1eed n\u00e0y.<\/p>\n<p>C\u00e1c m\u1eabu th\u1eed \u0111\u01b0\u1ee3c l\u1ea5y t\u1eeb c\u00e1c l\u00f4 th\u1eed nh\u01b0 sau:<\/p>\n<p>a) hai m\u1eabu th\u1eed t\u1eeb c\u00e1c thanh kh\u00e1c nhau \u0111\u1ec3 th\u1eed th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc (ph\u00e2n t\u00edch s\u1ea3n ph\u1ea9m).<\/p>\n<p>b) m\u01b0\u1eddi l\u0103m m\u1eabu th\u1eed (n\u1ebfu th\u00edch h\u1ee3p th\u00ec l\u1ea5y 60 m\u1eabu, xem 11.3.3.1) t\u1eeb c\u00e1c thanh kh\u00e1c nhau \u0111\u1ec3 th\u1eed t\u1ea5t c\u1ea3 c\u00e1c t\u00ednh ch\u1ea5t kh\u00e1c \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh trong ti\u00eau chu\u1ea9n n\u00e0y.<\/p>\n<p><b>11.3.3. \u0110\u00e1nh gi\u00e1 k\u1ebft qu\u1ea3<\/b><\/p>\n<p><b>11.3.3.1. Ki\u1ec3m tra theo d\u1ea5u hi\u1ec7u \u0111\u1ecbnh l\u01b0\u1ee3ng<\/b><\/p>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c t\u00ednh ch\u1ea5t \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh l\u00e0 c\u00e1c gi\u00e1 tr\u1ecb \u0111\u1eb7c tr\u01b0ng th\u00ec ph\u1ea3i x\u00e1c \u0111\u1ecbnh nh\u1eefng gi\u00e1 tr\u1ecb sau:<\/p>\n<p>a) t\u1ea5t c\u1ea3 c\u00e1c gi\u00e1 tr\u1ecb ri\u00eang bi\u1ec7t, x<sub>i<\/sub>, c\u1ee7a 15 m\u1eabu th\u1eed (n = 15)<\/p>\n<p>b) gi\u00e1 tr\u1ecb trung b\u00ecnh m<sub>15<\/sub>\u00a0(v\u1edbi n = 15)<\/p>\n<p>c) sai l\u1ec7ch chu\u1ea9n, s<sub>15<\/sub>\u00a0(v\u1edbi n = 15)<\/p>\n<p>L\u00f4 th\u1eed l\u00e0 th\u1ecfa m\u00e3n \u0111\u01b0\u1ee3c c\u00e1c y\u00eau c\u1ea7u n\u1ebfu \u0111i\u1ec1u ki\u1ec7n n\u00eau d\u01b0\u1edbi \u0111\u00e2y \u0111\u01b0\u1ee3c th\u1ecfa m\u00e3n \u0111\u1ed1i v\u1edbi t\u1ea5t c\u1ea3 c\u00e1c t\u00ednh ch\u1ea5t<\/p>\n<p align=\"center\">m<sub>15<\/sub>\u00a0&#8211; 2,33 x s<sub>15<\/sub>\u00a0\u2265\u00a0\u00a6<sub>k<\/sub><\/p>\n<p>trong \u0111\u00f3<\/p>\n<p>\u00a6<sub>k\u00a0<\/sub>l\u00e0 gi\u00e1 tr\u1ecb \u0111\u1eb7c tr\u01b0ng y\u00eau c\u1ea7u;<\/p>\n<p>2,33 l\u00e0 gi\u00e1 tr\u1ecb c\u1ee7a ch\u1ec9 s\u1ed1 ch\u1ea5p nh\u1eadn k, v\u1edbi n = 15 v\u00e0 t\u1ef7 l\u1ec7 h\u1ecfng 5% (p = 0,95) v\u1edbi x\u00e1c su\u1ea5t 90% (1-\u00a0a\u00a0= 0,90).<\/p>\n<p>N\u1ebfu \u0111i\u1ec1u ki\u1ec7n n\u00eau tr\u00ean kh\u00f4ng \u0111\u01b0\u1ee3c th\u1ecfa m\u00e3n th\u00ec ch\u1ec9 s\u1ed1<\/p>\n<p align=\"center\"><i>k&#8217; =<\/i><\/p>\n<p>\u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh t\u1eeb c\u00e1c k\u1ebft qu\u1ea3 th\u1eed s\u1eb5n c\u00f3. N\u1ebfu k&#8217; \u2265 2 th\u00ec ph\u00e9p th\u1eed c\u00f3 th\u1ec3 ti\u1ebfp t\u1ee5c. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y ph\u1ea3i th\u1eed 45 m\u1eabu ti\u1ebfp theo l\u1ea5y t\u1eeb c\u00e1c thanh kh\u00e1c nhau trong l\u00f4 th\u1eed, nh\u01b0 v\u1eady s\u1ebd c\u00f3 t\u1ed5ng s\u1ed1 60 k\u1ebft qu\u1ea3 th\u1eed (n = 60).<\/p>\n<p>L\u00f4 th\u1eed \u0111\u01b0\u1ee3c coi l\u00e0 th\u1ecfa m\u00e3n c\u00e1c y\u00eau c\u1ea7u n\u1ebfu \u0111i\u1ec1u ki\u1ec7n n\u00eau d\u01b0\u1edbi \u0111\u00e2y \u0111\u01b0\u1ee3c th\u1ecfa m\u00e3n \u0111\u1ed1i v\u1edbi t\u1ea5t c\u1ea3 c\u00e1c t\u00ednh ch\u1ea5t:<\/p>\n<p align=\"center\">m<sub>60<\/sub>\u00a0&#8211; 1,93 x s<sub>60<\/sub>\u00a0&gt;\u00a0\u00a6<sub>k<\/sub><\/p>\n<p>trong \u0111\u00f3 1,93 l\u00e0 gi\u00e1 tr\u1ecb c\u1ee7a ch\u1ec9 s\u1ed1 ch\u1ea5p nh\u1eadn, k, \u0111\u1ed1i v\u1edbi n = 60 v\u00e0 t\u1ef7 l\u1ec7 h\u1ecfng b\u1eb1ng 5% (p = 0,95) v\u1edbi x\u00e1c su\u1ea5t b\u1eb1ng 90% (1-\u00a0a\u00a0= 0,90)<\/p>\n<p><b>11.3.3.2. Ki\u1ec3m tra theo d\u1ea5u hi\u1ec7u lo\u1ea1i tr\u1eeb<\/b><\/p>\n<p>Khi c\u00e1c t\u00ednh ch\u1ea5t th\u1eed \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh nh\u01b0 gi\u00e1 tr\u1ecb l\u1edbn nh\u1ea5t hay nh\u1ecf th\u00ec t\u1ea5t c\u1ea3 c\u00e1c k\u1ebft qu\u1ea3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh tr\u00ean 15 m\u1eabu th\u1eed ph\u1ea3i th\u1ecfa m\u00e3n c\u00e1c y\u00eau c\u1ea7u c\u1ee7a ti\u00eau chu\u1ea9n n\u00e0y. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y l\u00f4 th\u1eed \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 l\u00e0 th\u1ecfa m\u00e3n c\u00e1c y\u00eau c\u1ea7u.<\/p>\n<p>C\u00e1c ph\u00e9p th\u1eed c\u00f3 th\u1ec3 ti\u1ebfp t\u1ee5c khi nhi\u1ec1u nh\u1ea5t c\u00f3 2 k\u1ebft qu\u1ea3 kh\u00f4ng ph\u00f9 h\u1ee3p \u0111i\u1ec1u ki\u1ec7n x\u1ea3y ra. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y ph\u1ea3i th\u1eed 45 m\u1eabu th\u1eed ti\u1ebfp theo t\u1eeb c\u00e1c thanh kh\u00e1c nhau trong l\u00f4 th\u1eed nh\u01b0 v\u1eady s\u1ebd c\u00f3 t\u1ed5ng s\u1ed1 60 k\u1ebft qu\u1ea3 th\u1eed. L\u00f4 th\u1eed th\u1ecfa m\u00e3n c\u00e1c y\u00eau c\u1ea7u n\u1ebfu nhi\u1ec1u nh\u1ea5t l\u00e0 2 trong s\u1ed1 60 k\u1ebft qu\u1ea3 kh\u00f4ng th\u1ecfa m\u00e3n c\u00e1c y\u00eau c\u1ea7u.<\/p>\n<p><b>11.3.3.3. Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc<\/b><\/p>\n<p>C\u1ea3 hai m\u1eabu th\u1eed ph\u1ea3i ph\u00f9 h\u1ee3p c\u00e1c y\u00eau c\u1ea7u c\u1ee7a ti\u00eau chu\u1ea9n n\u00e0y.<\/p>\n<p><b>11.4. Th\u1ea9m tra c\u00e1c gi\u00e1 tr\u1ecb nh\u1ecf nh\u1ea5t \u0111\u01b0\u1ee3c \u0111\u1ea3m b\u1ea3o<\/b><\/p>\n<p>C\u00e1c ph\u00e9p th\u1eed ph\u1ea3i \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh nh\u01b0 sau:<\/p>\n<p>&#8211; c\u00e1c thanh c\u1ee7a c\u00f9ng m\u1ed9t m\u1ebb \u0111\u00fac ph\u1ea3i thu\u1ed9c m\u1ed9t nh\u00f3m, c\u1ee9 50 t\u1ea5n hay m\u1ed9t ph\u1ea7n c\u1ee7a n\u00f3 ph\u1ea3i ti\u1ebfn h\u00e0nh m\u1ed9t l\u1ea7n th\u1eed k\u00e9o v\u00e0 m\u1ed9t l\u1ea7n th\u1eed u\u1ed1n \/ th\u1eed u\u1ed1n l\u1ea1i cho m\u1ed9t lo\u1ea1i \u0111\u01b0\u1eddng k\u00ednh.<\/p>\n<p>&#8211; m\u1ed7i k\u1ebft qu\u1ea3 th\u1eed ri\u00eang bi\u1ec7t ph\u1ea3i th\u1ecfa m\u00e3n c\u00e1c gi\u00e1 tr\u1ecb y\u00eau c\u1ea7u theo b\u1ea3ng 4 v\u00e0 c\u00e1c t\u00ednh ch\u1ea5t th\u1eed u\u1ed1n \/ th\u1eed u\u1ed1n l\u1ea1i theo 7.2 v\u00e0 7.3.<\/p>\n<p>M\u1ed7i m\u1ebb n\u1ea5u ph\u1ea3i ti\u1ebfn h\u00e0nh ph\u00e2n t\u00edch \u0111\u00fac m\u1ed9t l\u1ea7n \u0111\u1ec3 ki\u1ec3m tra th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc (\u0111i\u1ec1u 6). C\u00e1c m\u1eabu ph\u1ea3i \u0111\u01b0\u1ee3c l\u1ea5y theo ISO 377 &#8211; 2.<\/p>\n<p>&#8211; n\u1ebfu b\u1ea5t k\u1ef3 m\u1ed9t k\u1ebft qu\u1ea3 th\u1eed n\u00e0o kh\u00f4ng th\u1ecfa m\u00e3n c\u00e1c y\u00eau c\u1ea7u th\u00ec c\u00f3 th\u1ec3 ti\u1ebfn h\u00e0nh th\u1eed l\u1ea1i theo ISO 404.<\/p>\n<p>&#8211; ng\u01b0\u1eddi s\u1ea3n xu\u1ea5t ph\u1ea3i n\u1ed9p m\u1ed9t b\u1ea3n b\u00e1o c\u00e1o k\u1ebft qu\u1ea3 th\u1eed n\u00eau l\u00ean r\u1eb1ng c\u00e1c s\u1ea3n ph\u1ea9m cung c\u1ea5p th\u1ecfa m\u00e3n c\u00e1c t\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc v\u00e0 c\u01a1 h\u1ecdc \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh trong c\u00e1c \u0111i\u1ec1u 6 v\u00e0 7 v\u00e0 m\u1ed9t b\u1ea3n kh\u1eb3ng \u0111\u1ecbnh r\u1eb1ng c\u00e1c y\u00eau c\u1ea7u kh\u00e1c c\u1ee7a ti\u00eau chu\u1ea9n n\u00e0y c\u0169ng \u0111\u01b0\u1ee3c th\u1ecfa m\u00e3n.<\/p>\n<p><b>12. B\u00e1o c\u00e1o k\u1ebft qu\u1ea3 th\u1eed<\/b><\/p>\n<p>B\u00e1o c\u00e1o k\u1ebft qu\u1ea3 th\u1eed ph\u1ea3i bao g\u1ed3m c\u00e1c th\u00f4ng tin sau:<\/p>\n<p>a) k\u00fd hi\u1ec7u th\u00e9p l\u00e0m c\u1ed1t b\u00ea t\u00f4ng c\u00e1c th\u00f4ng tin sau:<\/p>\n<p>a) k\u00fd hi\u1ec7u th\u00e9p l\u00e0m c\u1ed1t b\u00ea t\u00f4ng theo ti\u00eau chu\u1ea9n n\u00e0y;<\/p>\n<p>c) ng\u00e0y, th\u00e1ng th\u1eed;<\/p>\n<p>d) kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a l\u00f4 th\u1eed;<\/p>\n<p>e) c\u00e1c k\u1ebft qu\u1ea3 th\u1eed.<\/p>\n<p align=\"center\"><b>\u00a0<\/b><\/p>\n<p align=\"center\"><b>Ph\u1ee5 l\u1ee5c A<\/b><\/p>\n<p align=\"center\">(tham kh\u1ea3o)<\/p>\n<p align=\"center\"><b>Hai h\u1ec7 th\u1ed1ng \u0111a qu\u1ed1c gia \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh th\u00e9p thanh v\u1eb1n<\/b><\/p>\n<p><b>A.1. Ti\u00eau chu\u1ea9n tr\u00edch d\u1eabn<\/b><\/p>\n<p>Euronorm 80 &#8211; 85 Th\u00e9p c\u1ed1t b\u00ea t\u00f4ng (kh\u00f4ng cho lo\u1ea1i d\u1ef1 \u1ee9ng l\u1ef1c) &#8211; C\u00e1c \u0111i\u1ec1u ki\u1ec7n cung c\u1ea5p k\u1ef9 thu\u1eadt ASTM A615 M &#8211; 88 Th\u00e9p thanh tr\u00f2n tr\u01a1n v\u00e0 bi\u1ebfn d\u1ea1ng l\u00e0m c\u1ed1t b\u00ea t\u00f4ng (h\u1ec7 m\u00e9t).<\/p>\n<p>CSA G3012 &#8211; M 1977 Th\u00e9p thanh l\u00e0m c\u1ed1t b\u00ea t\u00f4ng.<\/p>\n<p><b>A.2. V\u00ed d\u1ee5 1<\/b><\/p>\n<p>H\u1ec7 th\u1ed1ng theo Euronorm 80 &#8211; 85<\/p>\n<p><b>A.2.1. Ghi m\u00e1c lo\u1ea1i th\u00e9p<\/b><\/p>\n<p>Lo\u1ea1i th\u00e9p ph\u1ea3i \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m b\u1ec1 m\u1eb7t c\u1ee7a s\u1ea3n ph\u1ea9m nh\u01b0 sau (b\u1ed1 tr\u00ed c\u00e1c g\u00e2n xi\u00ean):<\/p>\n<p>A.2.1.1. Lo\u1ea1i th\u00e9p RB 400W \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng 2 h\u00e0ng g\u00e2n xi\u00ean \u1edf nh\u1eefng kho\u1ea3ng kh\u00e1c nhau tr\u00ean m\u1ed7i n\u1eeda c\u1ee7a chu vi (xem h\u00ecnh A.1). Th\u00e9p c\u1ed1t b\u00ea t\u00f4ng xo\u1eafn ngu\u1ed9i RB 400 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng c\u00e1c g\u00e2n d\u1ecdc xo\u1eafn v\u1edbi c\u00f9ng m\u1ed9t kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c g\u00e2n xi\u00ean tr\u00ean m\u1ed7i n\u1eeda c\u1ee7a chu vi.<\/p>\n<p>A.2.1.2. Lo\u1ea1i th\u00e9p RB 500W \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng 2 h\u00e0ng g\u00e2n xi\u00ean, m\u1ed9t h\u00e0ng bao g\u1ed3m c\u00e1c g\u00e2n xi\u00ean song song v\u00e0 h\u00e0ng kia ch\u1ee9a c\u00e1c g\u00e2n c\u00f3 \u0111\u1ed9 nghi\u00eang so v\u1edbi tr\u1ee5c thanh l\u00e0 thay \u0111\u1ed5i (xem h\u00ecnh A.2). Th\u00e9p c\u1ed1t b\u00ea t\u00f4ng xo\u1eafn k\u00e9p ngu\u1ed9i RB 500W \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng c\u00f3 th\u00eam c\u00e1c g\u00e2n d\u1ecdc xo\u1eafn k\u00e9p.<\/p>\n<p><b>A.2.2. K\u00fd hi\u1ec7u n\u01b0\u1edbc v\u00e0 nh\u00e0 m\u00e1y s\u1ea3n xu\u1ea5t<\/b><\/p>\n<p>A.2.2.1. N\u01b0\u1edbc s\u1ea3n xu\u1ea5t th\u00e9p v\u00e0 c\u1ea3 ng\u01b0\u1eddi s\u1ea3n xu\u1ea5t \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng c\u00e1ch b\u1ed1 tr\u00ed c\u1ee7a c\u00e1c g\u00e2n xi\u00ean th\u00f4ng th\u01b0\u1eddng xen gi\u1eefa c\u00e1c g\u00e2n xi\u00ean to h\u01a1n (xem h\u00ecnh A.1 v\u00e0 A.2).<\/p>\n<p>A.2.2.2. K\u00fd hi\u1ec7u ch\u00fa gi\u1ea3i ch\u1ed7 b\u1eaft \u0111\u1ea7u \u0111\u1ecdc \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh v\u00e0 h\u01b0\u1edbng c\u1ee7a n\u00f3 bao g\u1ed3m m\u1ed9t g\u00e2n xi\u00ean th\u00f4ng th\u01b0\u1eddng \u1edf gi\u1eefa hai g\u00e2n to h\u01a1n (xem h\u00ecnh A.1 v\u00e0 A.2).<\/p>\n<p>A.2.2.3. N\u01b0\u1edbc s\u1ea3n xu\u1ea5t \u0111\u01b0\u1ee3c k\u00fd hi\u1ec7u nh\u01b0 trong b\u1ea3ng A.1.<\/p>\n<p align=\"center\"><b>B\u1ea3ng A.1 &#8211; K\u00fd hi\u1ec7u n\u01b0\u1edbc s\u1ea3n xu\u1ea5t<\/b><\/p>\n<table border=\"1\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td width=\"316\">\n<p align=\"center\"><b>N\u01b0\u1edbc<\/b><\/p>\n<\/td>\n<td width=\"269\">\n<p align=\"center\"><b>S\u1ed1 g\u00e2n xi\u00ean th\u00f4ng th\u01b0\u1eddng gi\u1eefa hai g\u00e2n xi\u00ean to h\u01a1n<\/b><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"316\">\u0110\u1ee9c<\/td>\n<td valign=\"top\" width=\"269\">\n<p align=\"center\">1<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"316\">B\u1ec9, H\u00e0 Lan<\/td>\n<td valign=\"top\" width=\"269\">\n<p align=\"center\">2<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"316\">Ph\u00e1p<\/td>\n<td valign=\"top\" width=\"269\">\n<p align=\"center\">3<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"316\">\u00dd<\/td>\n<td valign=\"top\" width=\"269\">\n<p align=\"center\">4<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"316\">Anh, Ailen<\/td>\n<td valign=\"top\" width=\"269\">\n<p align=\"center\">5<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"316\">\u0110an M\u1ea1ch, Th\u1ee5y \u0110i\u1ec3n, Nauy<\/td>\n<td valign=\"top\" width=\"269\">\n<p align=\"center\">6<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"316\">T\u00e2y Ban Nha, B\u1ed3 \u0110\u00e0o Nha<\/td>\n<td valign=\"top\" width=\"269\">\n<p align=\"center\">7<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"316\">Hy L\u1ea1p, Th\u1ed5 Nh\u0129 K\u1ef3, Ti\u1ec7p Kh\u1eafc<\/td>\n<td valign=\"top\" width=\"269\">\n<p align=\"center\">8<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p align=\"center\"><img decoding=\"async\" src=\"https:\/\/thuvienxaydung.com.vn\/wp-content\/uploads\/2021\/06\/1_image009.jpg\" width=\"300\" height=\"139\" \/><\/p>\n<p align=\"center\"><b>H\u00ecnh A.1 &#8211; K\u00fd hi\u1ec7u th\u00e9p c\u1ed1t b\u00ea t\u00f4ng RB 400W (kh\u00f4ng xo\u1eafn ngu\u1ed9i)<\/b><\/p>\n<p align=\"center\"><img decoding=\"async\" src=\"https:\/\/thuvienxaydung.com.vn\/wp-content\/uploads\/2021\/06\/image010.jpg\" width=\"248\" height=\"123\" \/><\/p>\n<p align=\"center\"><b>H\u00ecnh A.2 &#8211; K\u00fd hi\u1ec7u th\u00e9p c\u1ed1t b\u00ea t\u00f4ng RB 500W (kh\u00f4ng xo\u1eafn ngu\u1ed9i)<\/b><\/p>\n<p>A.2.2.4. Theo m\u1ed9t ch\u1ec9 s\u1ed1 ph\u1ea3i \u0111\u01b0\u1ee3c chu\u1ea9n b\u1ecb cho t\u1eebng n\u01b0\u1edbc, m\u00e1c cho ng\u01b0\u1eddi s\u1ea3n xu\u1ea5t bao g\u1ed3m:<\/p>\n<p>a) m\u1ed9t nh\u00f3m c\u00e1c g\u00e2n xuy\u00ean th\u00f4ng th\u01b0\u1eddng (\u00edt nh\u1ea5t l\u00e0 hai);<\/p>\n<p>b) m\u1ed9t s\u1ed1 nh\u00f3m c\u00e1c g\u00e2n xuy\u00ean th\u00f4ng th\u01b0\u1eddng (m\u1ed9t l\u1ea7n n\u1eefa \u0111\u01b0\u1ee3c t\u00e1ch ra b\u1edfi m\u1ed9t g\u00e2n xi\u00ean to h\u01a1n), s\u1ed1 c\u00e1c g\u00e2n th\u00f4ng th\u01b0\u1eddng trong nh\u00f3m cu\u1ed1i c\u00f9ng \u00edt nh\u1ea5t ph\u1ea3i l\u00e0 hai.<\/p>\n<p><b>A.3. V\u00ed d\u1ee5 2<\/b><\/p>\n<p>H\u1ec7 th\u1ed1ng theo ASTMA 615 M &#8211; 88<\/p>\n<p>A.3.1. Khi x\u1ebfp h\u00e0ng \u0111\u1ec3 chuy\u00ean ch\u1edf th\u00ec c\u00e1c thanh ph\u1ea3i \u0111\u01b0\u1ee3c t\u00e1ch ra v\u00e0 g\u1eafn th\u1ebb c\u1ee7a ng\u01b0\u1eddi s\u1ea3n xu\u1ea5t m\u1ed9t c\u00e1ch h\u1ee3p l\u00fd c\u00f3 ghi s\u1ed1 c\u1ee7a m\u1ebb n\u1ea5u v\u00e0 s\u1ed1 k\u00fd hi\u1ec7u ki\u1ec3m tra.<\/p>\n<p>A.3.2. M\u1ed7i ng\u01b0\u1eddi s\u1ea3n xu\u1ea5t ph\u1ea3i x\u00e1c \u0111\u1ecbnh h\u1ec7 th\u1ed1ng ghi m\u00e1c c\u1ee7a m\u00ecnh.<\/p>\n<p>A.3.3. T\u1ea5t c\u1ea3 c\u00e1c thanh ph\u1ea3i \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi m\u1ed9t b\u1ed9 c\u00e1c m\u00e1c ph\u00e2n bi\u1ec7t nhau \u0111\u01b0\u1ee3c c\u00e1n m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng l\u00ean b\u1ec1 m\u1eb7t c\u1ee7a m\u1ed9t ph\u00eda c\u1ee7a thanh \u0111\u1ec3 ch\u00fa gi\u1ea3i theo tr\u1eadt t\u1ef1 sau \u0111\u00e2y:<\/p>\n<p>A.3.3.1. \u0110i\u1ec3m xu\u1ea5t ph\u00e1t<\/p>\n<p>Ch\u1eef c\u00e1i hay k\u00fd hi\u1ec7u do ng\u01b0\u1eddi s\u1ea3n xu\u1ea5t \u0111\u1eb7t ra.<\/p>\n<p>A.3.3.2. K\u00edch th\u01b0\u1edbc nh\u00e3n<\/p>\n<p>Ch\u1eef s\u1ed1 \u1ea2 r\u1eadp t\u01b0\u01a1ng \u1ee9ng v\u1edbi s\u1ed1 nh\u00e3n c\u1ee7a thanh (\u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a).<\/p>\n<p>A.3.3.3. Lo\u1ea1i th\u00e9p<\/p>\n<p>Ghi ch\u1eef S n\u1ebfu thanh th\u00e9p \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t theo quy \u0111\u1ecbnh trong ASTM A 615M. Kh\u00f4ng ghi m\u00e1c n\u1ebfu thanh th\u00e9p \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t theo CSA G30. 12 &#8211; M1977.<\/p>\n<p>A.3.3.4. C\u00e1ch k\u00fd hi\u1ec7u b\u1eb1ng gi\u1edbi h\u1ea1n ch\u1ea3y nh\u1ecf nh\u1ea5t<\/p>\n<p>\u0110\u1ed1i v\u1edbi lo\u1ea1i th\u00e9p RB 400 ho\u1eb7c c\u1ea3 s\u1ed1 4 (ASTM) hay 400 (CSA) hay m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng d\u1ecdc li\u00ean t\u1ee5c qua \u00edt nh\u1ea5t 5 kho\u1ea3ng t\u1eeb t\u00e2m c\u1ee7a ph\u00eda thanh (kh\u00f4ng ghi m\u00e1c cho th\u00e9p thanh lo\u1ea1i 300).<\/p>\n<p align=\"center\"><img decoding=\"async\" src=\"https:\/\/thuvienxaydung.com.vn\/wp-content\/uploads\/2021\/06\/1_image011.jpg\" width=\"267\" height=\"176\" \/><\/p>\n<p align=\"center\"><b>H\u00ecnh A.3 &#8211; Ghi m\u00e1c theo ASTM A615 M \u2013 88<\/b><\/p>\n<p align=\"center\"><b>\u00a0<\/b><\/p>\n<p align=\"center\"><b>Ph\u1ee5 l\u1ee5c B<\/b><\/p>\n<p align=\"center\">(tham kh\u1ea3o)<\/p>\n<p align=\"center\"><b>C\u00e1c kh\u1ea3 n\u0103ng \u0111\u1ec3 th\u1ecfa thu\u1eadn gi\u1eefa kh\u00e1ch h\u00e0ng v\u00e0 ng\u01b0\u1eddi cung c\u1ea5p<\/b><\/p>\n<p>\u0110\u1ec3 cho thu\u1eadn ti\u1ec7n, trong ti\u00eau chu\u1ea9n n\u00e0y c\u00f3 \u0111\u01b0a ra c\u00e1c \u0111i\u1ec1u kho\u1ea3n v\u1ec1 c\u00e1c y\u00eau c\u1ea7u b\u1ed5 sung hay b\u1ea5t \u0111\u1ed3ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ecfa thu\u1eadn gi\u1eefa kh\u00e1c h\u00e0ng v\u00e0 ng\u01b0\u1eddi cung c\u1ea5p \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea d\u01b0\u1edbi \u0111\u00e2y. B\u1ea3n li\u1ec7t k\u00ea n\u00e0y kh\u00f4ng bao h\u00e0m m\u1ed9t h\u1ea1n ch\u1ebf n\u00e0o v\u1ec1 c\u00e1c th\u1ecfa thu\u1eadn li\u00ean quan \u0111\u1ebfn c\u00e1c \u0111i\u1ec1u kho\u1ea3n kh\u00e1c.<\/p>\n<p>&#8211; \u0110\u01b0\u1eddng k\u00ednh l\u1edbn h\u01a1n 40 mm (b\u1ea3ng 1 v\u00e0 5).<\/p>\n<p>&#8211; Chi\u1ec1u d\u00e0i dung c\u1ea5p (\u0111i\u1ec1u 4).<\/p>\n<p>&#8211; G\u00e2n d\u1ecdc (\u0111i\u1ec1u 5).<\/p>\n<p>&#8211; C\u00e1c gi\u00e1 tr\u1ecb nh\u1ecf nh\u1ea5t \u0111\u01b0\u1ee3c \u0111\u1ea3m b\u1ea3o (7.1 v\u00e0 11.4).<\/p>\n<p>&#8211; C\u00e1c t\u00ednh ch\u1ea5t th\u1eed u\u1ed1n l\u1ea1i (7.3).<\/p>\n<p>&#8211; C\u00e1c t\u00ednh ch\u1ea5t m\u1ecfi (7.4).<\/p>\n<p>&#8211; T\u1ed5 ch\u1ee9c th\u1eed cung c\u1ea5p (11.3.1).<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>N\u1ed9i dung to\u00e0n v\u0103n Ti\u00eau chu\u1ea9n Vi\u1ec7t Nam TCVN 6285:1997 (ISO 6935-2 : 1980) v\u1ec1 th\u00e9p c\u1ed1t b\u00ea t\u00f4ng &#8211; Th\u00e9p thanh v\u1eb1n TI\u00caU CHU\u1ea8N VI\u1ec6T NAM TCVN 6285 : 1997 ISO 6935-2 : 1980 TH\u00c9P C\u1ed0T B\u00ca T\u00d4NG &#8211; TH\u00c9P THANH V\u1eb0N Steel for the reinforcement of concrete &#8211; Ribbed bars L\u1eddi n\u00f3i \u0111\u1ea7u&#8230;<\/p>\n","protected":false},"author":1,"featured_media":7943,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-7942","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"_links":{"self":[{"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/posts\/7942","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7942"}],"version-history":[{"count":3,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/posts\/7942\/revisions"}],"predecessor-version":[{"id":7957,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/posts\/7942\/revisions\/7957"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/media\/7943"}],"wp:attachment":[{"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7942"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7942"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7942"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}