{"id":2616,"date":"2026-09-26T00:33:57","date_gmt":"2026-09-25T17:33:57","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/"},"modified":"2026-09-26T00:33:57","modified_gmt":"2026-09-25T17:33:57","slug":"inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/","title":{"rendered":"Inox h\u1ed9p vu\u00f4ng &#038; ch\u1eef nh\u1eadt: ch\u1ecdn quy c\u00e1ch cho khung, k\u1ebft c\u1ea5u"},"content":{"rendered":"\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-left kksr-valign-top\"\n    data-payload='{&quot;align&quot;:&quot;left&quot;,&quot;id&quot;:&quot;2616&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;top&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;0&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;0&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;\u0110\u00e1nh gi\u00e1&quot;,&quot;legend&quot;:&quot;0\\\/5 - (0 b\u00ecnh ch\u1ecdn)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;title&quot;:&quot;Inox h\u1ed9p vu\u00f4ng \\u0026amp; ch\u1eef nh\u1eadt: ch\u1ecdn quy c\u00e1ch cho khung, k\u1ebft c\u1ea5u&quot;,&quot;width&quot;:&quot;0&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 0px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            <span class=\"kksr-muted\">\u0110\u00e1nh gi\u00e1<\/span>\n    <\/div>\n    <\/div>\n<div class=\"custom-toc\">\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/#Noi_dung_chinh\" >N\u1ed9i dung ch\u00ednh<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/#Hop_vuong_hay_hop_chu_nhat_chon_loai_nao_cho_khungket_cau\" >H\u1ed9p vu\u00f4ng hay h\u1ed9p ch\u1eef nh\u1eadt: ch\u1ecdn lo\u1ea1i n\u00e0o cho khung\/k\u1ebft c\u1ea5u?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/#Cac_tieu_chi_ky_thuat_quyet_dinh_quy_cach\" >C\u00e1c ti\u00eau ch\u00ed k\u1ef9 thu\u1eadt quy\u1ebft \u0111\u1ecbnh quy c\u00e1ch<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/#Tai_trong_khau_do_gioi_han_vong_va_ung_xu_khi_uon\" >T\u1ea3i tr\u1ecdng, kh\u1ea9u \u0111\u1ed9, gi\u1edbi h\u1ea1n v\u00f5ng v\u00e0 \u1ee9ng x\u1eed khi u\u1ed1n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/#On_dinh_cot_nen_va_do_manh\" >\u1ed4n \u0111\u1ecbnh c\u1ed9t (n\u00e9n) v\u00e0 \u0111\u1ed9 m\u1ea3nh<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/#Moi_truong_an_mon_va_chon_mac_inox\" >M\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n v\u00e0 ch\u1ecdn m\u00e1c inox<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/#Cong_nghe_gia_cong_va_lien_ket\" >C\u00f4ng ngh\u1ec7 gia c\u00f4ng v\u00e0 li\u00ean k\u1ebft<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/#Tieu_chuan_dung_sai_va_nhan_dien_vat_lieu\" >Ti\u00eau chu\u1ea9n, dung sai v\u00e0 nh\u1eadn di\u1ec7n v\u1eadt li\u1ec7u<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/#Quy_trinh_6_buoc_chon_nhanh_quy_cach_hop_inox\" >Quy tr\u00ecnh 6 b\u01b0\u1edbc ch\u1ecdn nhanh quy c\u00e1ch h\u1ed9p inox<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/#Du_lieu_vat_lieu_va_cong_thuc_can_biet\" >D\u1eef li\u1ec7u v\u1eadt li\u1ec7u v\u00e0 c\u00f4ng th\u1ee9c c\u1ea7n bi\u1ebft<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/#Goi_y_quy_cach_theo_ung_dung_pho_bien_tham_khao_thuc_te_thi_truong_VN\" >G\u1ee3i \u00fd quy c\u00e1ch theo \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn (tham kh\u1ea3o th\u1ef1c t\u1ebf th\u1ecb tr\u01b0\u1eddng VN)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/#Vi_du_tinh_chon_thuc_te\" >V\u00ed d\u1ee5 t\u00ednh ch\u1ecdn th\u1ef1c t\u1ebf<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/#Vi_du_1_%E2%80%93_Dam_mai_che_nhip_25_m_tai_deu_030_kNm\" >V\u00ed d\u1ee5 1 \u2013 D\u1ea7m m\u00e1i che nh\u1ecbp 2.5 m, t\u1ea3i \u0111\u1ec1u 0.30 kN\/m<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/#Vi_du_2_%E2%80%93_Cot_cao_30_m_chiu_nen_20_kN_lien_ket_khop%E2%80%93khop\" >V\u00ed d\u1ee5 2 \u2013 C\u1ed9t cao 3.0 m ch\u1ecbu n\u00e9n 20 kN (li\u00ean k\u1ebft kh\u1edbp\u2013kh\u1edbp)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/#Vi_du_3_%E2%80%93_Khung_ke_nhip_10_m_tai_deu_08_kNm\" >V\u00ed d\u1ee5 3 \u2013 Khung k\u1ec7 nh\u1ecbp 1.0 m, t\u1ea3i \u0111\u1ec1u 0.8 kN\/m<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/#Do_day_thanh_anh_huong_den_chiu_luc_han_va_tuoi_tho\" >\u0110\u1ed9 d\u00e0y th\u00e0nh: \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ecbu l\u1ef1c, h\u00e0n v\u00e0 tu\u1ed5i th\u1ecd<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/#Lua_chon_be_mat_va_xu_ly_sau_gia_cong\" >L\u1ef1a ch\u1ecdn b\u1ec1 m\u1eb7t v\u00e0 x\u1eed l\u00fd sau gia c\u00f4ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/#Tieu_chuan_%E2%80%93_kiem_soat_chat_luong_khi_mua\" >Ti\u00eau chu\u1ea9n \u2013 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng khi mua<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/#Toi_uu_chi_phi_va_tinh_san_co_tai_Viet_Nam\" >T\u1ed1i \u01b0u chi ph\u00ed v\u00e0 t\u00ednh s\u1eb5n c\u00f3 t\u1ea1i Vi\u1ec7t Nam<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/#Lap_dung_va_chi_tiet_lien_ket_ben_%E2%80%93_dep\" >L\u1eafp d\u1ef1ng v\u00e0 chi ti\u1ebft li\u00ean k\u1ebft b\u1ec1n \u2013 \u0111\u1eb9p<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/#An_toan_va_bao_tri\" >An to\u00e0n v\u00e0 b\u1ea3o tr\u00ec<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/#Cac_cau_hoi_thuong_gap_FAQ\" >C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQ)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/#Tai_lieu_tham_khao\" >T\u00e0i li\u1ec7u tham kh\u1ea3o<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/inoxcuongthinh.com\/inox-hop-vuong-chu-nhat-chon-quy-cach-cho-khung-ket-cau-3\/#Ket_luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<h3><span class=\"ez-toc-section\" id=\"Noi_dung_chinh\"><\/span>N\u1ed9i dung ch\u00ednh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><a href=\"#toc-0-hop-vuong-hay-hop-chu-nhat-chon-loai-nao-cho-khung\">H\u1ed9p vu\u00f4ng hay h\u1ed9p ch\u1eef nh\u1eadt: ch\u1ecdn lo\u1ea1i n\u00e0o cho khung\/k\u1ebft c\u1ea5u?<\/a><\/li>\n<li><a href=\"#toc-1-cac-tieu-chi-ky-thuat-quyet-dinh-quy-cach\">C\u00e1c ti\u00eau ch\u00ed k\u1ef9 thu\u1eadt quy\u1ebft \u0111\u1ecbnh quy c\u00e1ch<\/a><\/li>\n<li><a href=\"#toc-2-quy-trinh-6-buoc-chon-nhanh-quy-cach-hop-inox\">Quy tr\u00ecnh 6 b\u01b0\u1edbc ch\u1ecdn nhanh quy c\u00e1ch h\u1ed9p inox<\/a><\/li>\n<li><a href=\"#toc-3-du-lieu-vat-lieu-va-cong-thuc-can-biet\">D\u1eef li\u1ec7u v\u1eadt li\u1ec7u v\u00e0 c\u00f4ng th\u1ee9c c\u1ea7n bi\u1ebft<\/a><\/li>\n<li><a href=\"#toc-4-goi-y-quy-cach-theo-ung-dung-pho-bien-tham-khao-th\">G\u1ee3i \u00fd quy c\u00e1ch theo \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn (tham kh\u1ea3o th\u1ef1c t\u1ebf th\u1ecb tr\u01b0\u1eddng VN)<\/a><\/li>\n<li><a href=\"#toc-5-vi-du-tinh-chon-thuc-te\">V\u00ed d\u1ee5 t\u00ednh ch\u1ecdn th\u1ef1c t\u1ebf<\/a><\/li>\n<li><a href=\"#toc-6-do-day-thanh-anh-huong-den-chiu-luc-han-va-tuoi-th\">\u0110\u1ed9 d\u00e0y th\u00e0nh: \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ecbu l\u1ef1c, h\u00e0n v\u00e0 tu\u1ed5i th\u1ecd<\/a><\/li>\n<li><a href=\"#toc-7-lua-chon-be-mat-va-xu-ly-sau-gia-cong\">L\u1ef1a ch\u1ecdn b\u1ec1 m\u1eb7t v\u00e0 x\u1eed l\u00fd sau gia c\u00f4ng<\/a><\/li>\n<li><a href=\"#toc-8-tieu-chuan-kiem-soat-chat-luong-khi-mua\">Ti\u00eau chu\u1ea9n \u2013 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng khi mua<\/a><\/li>\n<li><a href=\"#toc-9-toi-uu-chi-phi-va-tinh-san-co-tai-viet-nam\">T\u1ed1i \u01b0u chi ph\u00ed v\u00e0 t\u00ednh s\u1eb5n c\u00f3 t\u1ea1i Vi\u1ec7t Nam<\/a><\/li>\n<li><a href=\"#toc-10-lap-dung-va-chi-tiet-lien-ket-ben-dep\">L\u1eafp d\u1ef1ng v\u00e0 chi ti\u1ebft li\u00ean k\u1ebft b\u1ec1n \u2013 \u0111\u1eb9p<\/a><\/li>\n<li><a href=\"#toc-11-an-toan-va-bao-tri\">An to\u00e0n v\u00e0 b\u1ea3o tr\u00ec<\/a><\/li>\n<li><a href=\"#toc-12-cac-cau-hoi-thuong-gap-faq\">C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQ)<\/a><\/li>\n<li><a href=\"#toc-13-tai-lieu-tham-khao\">T\u00e0i li\u1ec7u tham kh\u1ea3o<\/a><\/li>\n<li><a href=\"#toc-14-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>Inox h\u1ed9p vu\u00f4ng (SHS) v\u00e0 ch\u1eef nh\u1eadt (RHS) l\u00e0 v\u1eadt t\u01b0 ch\u1ee7 l\u1ef1c \u0111\u1ec3 l\u00e0m khung s\u01b0\u1eddn, c\u1ed9t, k\u00e8o, gi\u00e0n, m\u00e1i che, khung m\u00e1y, k\u1ec7, v\u00e1ch v\u00e0 bi\u1ec3n b\u1ea3ng. B\u00e0i vi\u1ebft n\u00e0y l\u00e0 h\u01b0\u1edbng d\u1eabn th\u1ef1c h\u00e0nh, gi\u00fap b\u1ea1n ch\u1ecdn nhanh \u0111\u00fang quy c\u00e1ch (k\u00edch th\u01b0\u1edbc, \u0111\u1ed9 d\u00e0y, m\u00e1c inox) \u0111\u00e1p \u1ee9ng ch\u1ecbu l\u1ef1c, b\u1ec1n \u0103n m\u00f2n, d\u1ec5 gia c\u00f4ng v\u00e0 t\u1ed1i \u01b0u chi ph\u00ed. Ch\u1ee7 \u0111\u1ec1 n\u00e0y n\u1eb1m trong b\u1ee9c tranh t\u1ed5ng th\u1ec3 v\u1ec1 \u1ed1ng\/h\u1ed9p inox, nh\u01b0ng t\u1eadp trung s\u00e2u v\u00e0o \u1ee9ng d\u1ee5ng khung \u2013 k\u1ebft c\u1ea5u.<\/p>\n<h2 id=\"toc-0-hop-vuong-hay-hop-chu-nhat-chon-loai-nao-cho-khung\"><span class=\"ez-toc-section\" id=\"Hop_vuong_hay_hop_chu_nhat_chon_loai_nao_cho_khungket_cau\"><\/span>H\u1ed9p vu\u00f4ng hay h\u1ed9p ch\u1eef nh\u1eadt: ch\u1ecdn lo\u1ea1i n\u00e0o cho khung\/k\u1ebft c\u1ea5u?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; H\u1ed9p ch\u1eef nh\u1eadt (RHS) cho d\u1ea7m\/gi\u1eb1ng: u\u1ed1n theo tr\u1ee5c m\u1ea1nh (chi\u1ec1u cao l\u1edbn) s\u1ebd hi\u1ec7u qu\u1ea3 h\u01a1n v\u1ec1 \u0111\u1ed9 c\u1ee9ng v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng. V\u00ed d\u1ee5 40x80x1.5 \u0111\u1eb7t chi\u1ec1u 80 theo ph\u01b0\u01a1ng u\u1ed1n cho v\u00f5ng nh\u1ecf h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi h\u1ed9p vu\u00f4ng c\u00f9ng di\u1ec7n t\u00edch.<br \/>\n&#8211; H\u1ed9p vu\u00f4ng (SHS) cho c\u1ed9t\/khung kh\u00f4ng \u0111\u1ecbnh h\u01b0\u1edbng u\u1ed1n r\u00f5 r\u1ec7t: \u0111\u1ed1i x\u1ee9ng, \u0111\u1eb9p, d\u1ec5 n\u1ed1i g\u00f3c, ch\u1ecbu n\u00e9n \u2013 u\u1ed1n hai ph\u01b0\u01a1ng c\u00e2n b\u1eb1ng.<br \/>\n&#8211; Ch\u1ecbu xo\u1eafn\/va \u0111\u1eadp: SHS c\u00f3 t\u00ednh \u0111\u1eb3ng h\u01b0\u1edbng cao h\u01a1n; RHS n\u1ebfu xoay \u0111\u00fang ph\u01b0\u01a1ng v\u1eabn r\u1ea5t t\u1ed1t.<br \/>\n&#8211; Th\u1ea9m m\u1ef9 \u2013 \u1ed1p m\u1eb7t d\u1ef1ng\/lan can: x\u00e9t b\u1ec1 m\u1eb7t, b\u00e1n k\u00ednh bo g\u00f3c v\u00e0 th\u00f3i quen thi c\u00f4ng; SHS 40&#215;40, 50&#215;50 ph\u1ed5 bi\u1ebfn; RHS 25&#215;50, 40&#215;80 cho khung c\u1eeda, m\u00e1i che.<\/p>\n<h2 id=\"toc-1-cac-tieu-chi-ky-thuat-quyet-dinh-quy-cach\"><span class=\"ez-toc-section\" id=\"Cac_tieu_chi_ky_thuat_quyet_dinh_quy_cach\"><\/span>C\u00e1c ti\u00eau ch\u00ed k\u1ef9 thu\u1eadt quy\u1ebft \u0111\u1ecbnh quy c\u00e1ch<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Tai_trong_khau_do_gioi_han_vong_va_ung_xu_khi_uon\"><\/span>T\u1ea3i tr\u1ecdng, kh\u1ea9u \u0111\u1ed9, gi\u1edbi h\u1ea1n v\u00f5ng v\u00e0 \u1ee9ng x\u1eed khi u\u1ed1n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; Momen u\u1ed1n c\u1ef1c \u0111\u1ea1i (d\u1ea7m gi\u1ea3n \u0111\u01a1n, t\u1ea3i \u0111\u1ec1u): M = wL\u00b2\/8<br \/>\n&#8211; \u0110\u1ed9 v\u00f5ng (d\u1ea7m gi\u1ea3n \u0111\u01a1n, t\u1ea3i \u0111\u1ec1u): \u03b4 = 5wL\u2074\/(384EI)<br \/>\n&#8211; Gi\u1edbi h\u1ea1n v\u00f5ng khuy\u1ebfn ngh\u1ecb: L\/200 (k\u1ebft c\u1ea5u ph\u1ee5), L\/240\u2013L\/300 (m\u00e1i che\/k\u1ec7), L\/360 (y\u00eau c\u1ea7u th\u1ea9m m\u1ef9 cao).<br \/>\n&#8211; \u1ee8ng su\u1ea5t u\u1ed1n: \u03c3 = M\/Z \u2264 \u03c3 cho ph\u00e9p (d\u1ef1a tr\u00ean m\u00e1c inox v\u00e0 ph\u01b0\u01a1ng ph\u00e1p thi\u1ebft k\u1ebf).<\/p>\n<h3><span class=\"ez-toc-section\" id=\"On_dinh_cot_nen_va_do_manh\"><\/span>\u1ed4n \u0111\u1ecbnh c\u1ed9t (n\u00e9n) v\u00e0 \u0111\u1ed9 m\u1ea3nh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; \u0110\u1ed9 m\u1ea3nh: \u03bb = KL\/r (K: h\u1ec7 s\u1ed1 chi\u1ec1u d\u00e0i h\u1eefu hi\u1ec7u, r: b\u00e1n k\u00ednh qu\u00e1n t\u00ednh). Tr\u00e1nh \u03bb qu\u00e1 l\u1edbn \u0111\u1ec3 h\u1ea1n ch\u1ebf o\u1eb1n.<br \/>\n&#8211; T\u1ea3i t\u1edbi h\u1ea1n Euler (x\u1ea5p x\u1ec9): Pcr = \u03c0\u00b2EI\/(KL)\u00b2. \u00c1p d\u1ee5ng h\u1ec7 s\u1ed1 an to\u00e0n ph\u00f9 h\u1ee3p ti\u00eau chu\u1ea9n thi\u1ebft k\u1ebf.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Moi_truong_an_mon_va_chon_mac_inox\"><\/span>M\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n v\u00e0 ch\u1ecdn m\u00e1c inox<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; Trong nh\u00e0 kh\u00f4\/\u00edt ho\u00e1 ch\u1ea5t: 201 (kinh t\u1ebf), c\u00e2n nh\u1eafc 304 n\u1ebfu c\u00f3 h\u00e0n nhi\u1ec1u ho\u1eb7c y\u00eau c\u1ea7u b\u1ec1n m\u00e0u.<br \/>\n&#8211; Ngo\u00e0i tr\u1eddi \u0111\u00f4 th\u1ecb\/\u1ea9m: 304\/304L l\u00e0 l\u1ef1a ch\u1ecdn \u201cchu\u1ea9n\u201d.<br \/>\n&#8211; Ven bi\u1ec3n, clo, c\u00f4ng nghi\u1ec7p ho\u00e1 ch\u1ea5t\/thu\u1ef7 s\u1ea3n: 316\/316L ho\u1eb7c gi\u1ea3i ph\u00e1p b\u1ec1 m\u1eb7t v\u01b0\u1ee3t tr\u1ed9i.<br \/>\n&#8211; H\u00e0n nhi\u1ec1u, ti\u1ebft di\u1ec7n d\u00e0y: d\u00f9ng m\u00e1c \u201cL\u201d (304L\/316L) h\u1ea1n ch\u1ebf nh\u1ea1y c\u1ea3m ho\u00e1 h\u1ecdc t\u1ea1i v\u00f9ng \u1ea3nh h\u01b0\u1edfng nhi\u1ec7t.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cong_nghe_gia_cong_va_lien_ket\"><\/span>C\u00f4ng ngh\u1ec7 gia c\u00f4ng v\u00e0 li\u00ean k\u1ebft<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; H\u00e0n TIG\/MIG v\u1edbi v\u1eadt li\u1ec7u h\u00e0n t\u01b0\u01a1ng th\u00edch (ER308L cho 304, ER316L cho 316); l\u00e0m s\u1ea1ch, t\u1ea9y m\u1ed1i h\u00e0n \u2013 th\u1ee5 \u0111\u1ed9ng ho\u00e1 sau h\u00e0n \u0111\u1ec3 \u1ed5n \u0111\u1ecbnh th\u1ea9m m\u1ef9 v\u00e0 ch\u1ed1ng \u0103n m\u00f2n khe.<br \/>\n&#8211; Khoan, c\u1eaft: d\u00f9ng l\u01b0\u1ee1i\/\u0111\u00e1 chuy\u00ean d\u1ee5ng inox; tr\u00e1nh nhi\u1ec5m b\u1ea9n s\u1eaft th\u01b0\u1eddng (g\u00e2y \u201c\u1ed1 tr\u00e0\u201d).<br \/>\n&#8211; Li\u00ean k\u1ebft bul\u00f4ng: d\u00f9ng A2-70 (cho 304) ho\u1eb7c A4-70 (cho 316); c\u00e1ch ly \u0111i\u1ec7n ho\u00e1 khi ti\u1ebfp x\u00fac v\u1eadt li\u1ec7u kh\u00e1c.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tieu_chuan_dung_sai_va_nhan_dien_vat_lieu\"><\/span>Ti\u00eau chu\u1ea9n, dung sai v\u00e0 nh\u1eadn di\u1ec7n v\u1eadt li\u1ec7u<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; \u1ed0ng\/h\u1ed9p inox c\u01a1 kh\u00ed \u2013 trang tr\u00ed: ASTM A554\/A554M (k\u00edch th\u01b0\u1edbc, dung sai, b\u1ec1 m\u1eb7t).<br \/>\n&#8211; Thi\u1ebft k\u1ebf k\u1ebft c\u1ea5u inox: Eurocode 3 \u2013 Ph\u1ea7n 1-4 (EN 1993-1-4), Design Manual for Structural Stainless Steel (Euro Inox\/SCI).<br \/>\n&#8211; Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc tham chi\u1ebfu: ISO 15510, EN 10088.<br \/>\n&#8211; Dung sai \u0111i\u1ec3n h\u00ecnh theo ASTM A554: k\u00edch th\u01b0\u1edbc ngo\u00e0i \u00b10.5% (min \u00b10.20 mm), \u0111\u1ed9 d\u00e0y \u00b110% (ph\u1ed5 bi\u1ebfn), \u0111\u1ed9 vu\u00f4ng g\u00f3c, b\u00e1n k\u00ednh g\u00f3c ~2t (nh\u00e0 m\u00e1y c\u00f3 th\u1ec3 kh\u00e1c).<br \/>\n&#8211; Nh\u1eadn di\u1ec7n nhanh: test nam ch\u00e2m (201 th\u01b0\u1eddng nhi\u1ec5m t\u1eeb m\u1ea1nh h\u01a1n 304), y\u00eau c\u1ea7u MTC\/CO-CQ x\u00e1c nh\u1eadn m\u00e1c.<\/p>\n<h2 id=\"toc-2-quy-trinh-6-buoc-chon-nhanh-quy-cach-hop-inox\"><span class=\"ez-toc-section\" id=\"Quy_trinh_6_buoc_chon_nhanh_quy_cach_hop_inox\"><\/span>Quy tr\u00ecnh 6 b\u01b0\u1edbc ch\u1ecdn nhanh quy c\u00e1ch h\u1ed9p inox<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>1) X\u00e1c \u0111\u1ecbnh t\u1ea3i tr\u1ecdng v\u00e0 kh\u1ea9u \u0111\u1ed9 l\u00e0m vi\u1ec7c (t\u0129nh, \u0111\u1ed9ng, gi\u00f3; ph\u00e2n b\u1ed1 \u0111\u1ec1u hay t\u1eadp trung).<br \/>\n2) Ch\u1ecdn m\u00e1c inox theo m\u00f4i tr\u01b0\u1eddng (201\/304\/316, \u01b0u ti\u00ean 304L\/316L khi h\u00e0n nhi\u1ec1u).<br \/>\n3) Ch\u1ecdn ti\u1ebft di\u1ec7n s\u01a1 b\u1ed9:<br \/>\n   &#8211; D\u1ea7m\/gi\u1eb1ng: \u01b0u ti\u00ean RHS, t\u0103ng chi\u1ec1u cao theo ph\u01b0\u01a1ng u\u1ed1n \u0111\u1ec3 t\u0103ng Z m\u1ea1nh.<br \/>\n   &#8211; C\u1ed9t: SHS\/RHS c\u00e2n \u0111\u1ed1i, h\u1ea1n ch\u1ebf \u0111\u1ed9 m\u1ea3nh \u03bb = KL\/r, ch\u1ecdn \u0111\u1ed9 d\u00e0y ph\u00f9 h\u1ee3p li\u00ean k\u1ebft.<br \/>\n4) Ki\u1ec3m tra b\u1ec1n u\u1ed1n\/n\u00e9n (\u03c3 \u2264 \u03c3 cho ph\u00e9p) v\u00e0 v\u00f5ng (\u03b4 \u2264 L\/gi\u1edbi h\u1ea1n).<br \/>\n5) Ki\u1ec3m tra \u1ed5n \u0111\u1ecbnh c\u1ed9t\/d\u1ea7m m\u1ea3nh (Euler, hi\u1ec7u \u1ee9ng u\u1ed1n-n\u00e9n k\u1ebft h\u1ee3p n\u1ebfu c\u00f3).<br \/>\n6) X\u00e1c nh\u1eadn kh\u1ea3 n\u0103ng thi c\u00f4ng \u2013 t\u1ed3n kho: ch\u1ecdn quy c\u00e1ch \u201cth\u1ecb tr\u01b0\u1eddng\u201d \u0111\u1ec3 t\u1ed1i \u01b0u gi\u00e1 v\u00e0 ti\u1ebfn \u0111\u1ed9.<\/p>\n<h2 id=\"toc-3-du-lieu-vat-lieu-va-cong-thuc-can-biet\"><span class=\"ez-toc-section\" id=\"Du_lieu_vat_lieu_va_cong_thuc_can_biet\"><\/span>D\u1eef li\u1ec7u v\u1eadt li\u1ec7u v\u00e0 c\u00f4ng th\u1ee9c c\u1ea7n bi\u1ebft<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; M\u00f4 \u0111un \u0111\u00e0n h\u1ed3i E \u2248 193 GPa (193,000 MPa) \u0111\u1ed1i v\u1edbi th\u00e9p kh\u00f4ng g\u1ec9 austenit.<br \/>\n&#8211; C\u01b0\u1eddng \u0111\u1ed9 ch\u1ea3y Rp0.2 \u0111i\u1ec3n h\u00ecnh: 201 \u2248 275 MPa; 304\/304L \u2248 205\u2013215 MPa; 316\/316L \u2248 205 MPa.<br \/>\n&#8211; C\u00e1ch l\u1ea5y \u1ee9ng su\u1ea5t cho ph\u00e9p (thi\u1ebft k\u1ebf s\u01a1 b\u1ed9 theo \u1ee9ng x\u1eed \u0111\u00e0n h\u1ed3i): \u03c3allow \u2248 0.6\u00d7Rp0.2 (tham kh\u1ea3o, c\u1ea7n hi\u1ec7u ch\u1ec9nh theo ti\u00eau chu\u1ea9n thi\u1ebft k\u1ebf b\u1ea1n \u00e1p d\u1ee5ng).<br \/>\n&#8211; Di\u1ec7n t\u00edch ti\u1ebft di\u1ec7n r\u1ed7ng ch\u1eef nh\u1eadt: A = b\u00b7h \u2212 (b\u22122t)(h\u22122t) \u2248 2t(b + h \u2212 2t)<br \/>\n&#8211; M\u00f4 men qu\u00e1n t\u00ednh:<br \/>\n   &#8211; Ix = [b\u00b7h\u00b3 \u2212 (b\u22122t)(h\u22122t)\u00b3]\/12 (tr\u1ee5c m\u1ea1nh theo h)<br \/>\n   &#8211; Iy = [h\u00b7b\u00b3 \u2212 (h\u22122t)(b\u22122t)\u00b3]\/12<br \/>\n&#8211; M\u00f4 \u0111un kh\u00e1ng u\u1ed1n: Zx = Ix\/(h\/2); Zy = Iy\/(b\/2)<br \/>\n&#8211; Kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang: 7.93 g\/cm\u00b3; tr\u1ecdng l\u01b0\u1ee3ng m\u1ed7i m\u00e9t: G (kg\/m) \u2248 0.00793 \u00d7 A(mm\u00b2)<\/p>\n<h2 id=\"toc-4-goi-y-quy-cach-theo-ung-dung-pho-bien-tham-khao-th\"><span class=\"ez-toc-section\" id=\"Goi_y_quy_cach_theo_ung_dung_pho_bien_tham_khao_thuc_te_thi_truong_VN\"><\/span>G\u1ee3i \u00fd quy c\u00e1ch theo \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn (tham kh\u1ea3o th\u1ef1c t\u1ebf th\u1ecb tr\u01b0\u1eddng VN)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; Khung c\u1eeda, v\u00e1ch ng\u0103n trong nh\u00e0: RHS 25x50x1.0\u20131.2 (201\/304), d\u1ea7m ngang c\u00f3 th\u1ec3 30x60x1.2<br \/>\n&#8211; Lan can, tay v\u1ecbn kh\u00f4: SHS 40x40x1.2\u20131.5 (304), tr\u1ee5 50x50x1.5<br \/>\n&#8211; M\u00e1i che t\u1ea5m poly\/ton nh\u1eb9, nh\u1ecbp 2.0\u20133.0 m:<br \/>\n  &#8211; D\u1ea7m ch\u00ednh: RHS 40x80x1.5 ho\u1eb7c 50x100x1.5 (304); x\u00e0 g\u1ed3: RHS 25x50x1.2<br \/>\n&#8211; K\u1ec7\/khung m\u00e1y nh\u1eb9 (t\u1ea3i 200\u2013400 kg\/b\u1ec7, nh\u1ecbp <1.2 m): SHS 30x30x1.5 ho\u1eb7c 40x40x1.5 (304)\n- Bi\u1ec3n b\u1ea3ng kh\u1ed5 v\u1eeba (gi\u00f3 \u0111\u00f4 th\u1ecb, chi\u1ec1u cao <3 m): c\u1ed9t SHS 60x60x2.0; gi\u1eb1ng RHS 30x60x1.5 (304)\n- S\u00e0n g\u00e1c nh\u1eb9 (v\u00e1n g\u1ed7\/t\u00f4n, t\u1ea3i 1.5\u20132.0 kN\/m\u00b2, nh\u1ecbp 1.5\u20132.0 m): d\u1ea7m RHS 50x100x2.0; c\u1ed9t SHS 80x80x2.5 (304). V\u1edbi m\u00f4i tr\u01b0\u1eddng \u1ea9m\/bi\u1ec3n, ch\u1ecdn 316 ho\u1eb7c t\u0103ng b\u1ea3o v\u1ec7 b\u1ec1 m\u1eb7t.\n\nL\u01b0u \u00fd: \u0111\u1ed9 d\u00e0y nh\u1ecf (\u22641.0 mm) ch\u1ec9 th\u00edch h\u1ee3p n\u1ed9i th\u1ea5t\/trang tr\u00ed; k\u1ebft c\u1ea5u ch\u1ecbu l\u1ef1c n\u00ean t\u1eeb 1.2\u20132.5 mm ho\u1eb7c l\u1edbn h\u01a1n, t\u00f9y t\u1ea3i v\u00e0 li\u00ean k\u1ebft.\n\n\n\n<h2 id=\"toc-5-vi-du-tinh-chon-thuc-te\"><span class=\"ez-toc-section\" id=\"Vi_du_tinh_chon_thuc_te\"><\/span>V\u00ed d\u1ee5 t\u00ednh ch\u1ecdn th\u1ef1c t\u1ebf<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Vi_du_1_%E2%80%93_Dam_mai_che_nhip_25_m_tai_deu_030_kNm\"><\/span>V\u00ed d\u1ee5 1 \u2013 D\u1ea7m m\u00e1i che nh\u1ecbp 2.5 m, t\u1ea3i \u0111\u1ec1u 0.30 kN\/m<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; Ch\u1ecdn s\u01a1 b\u1ed9: RHS 40x80x1.5 (\u0111\u1eb7t chi\u1ec1u 80 theo ph\u01b0\u01a1ng u\u1ed1n).<br \/>\n&#8211; T\u00ednh nhanh h\u00ecnh h\u1ecdc: b=40 mm, h=80 mm, t=1.5 mm.<br \/>\n  &#8211; A \u2248 2t(b+h\u22122t) = 3\u00d7117 = 351 mm\u00b2 \u2192 G \u2248 2.78 kg\/m.<br \/>\n  &#8211; Ix = [40\u00b780\u00b3 \u2212 37\u00b777\u00b3]\/12 \u2248 299,000 mm\u2074 \u2192 Zx \u2248 7,475 mm\u00b3.<br \/>\n&#8211; Momen u\u1ed1n max: M = wL\u00b2\/8 = 0.30\u00d72.5\u00b2\/8 = 0.234 kN\u00b7m = 234,000 N\u00b7mm.<br \/>\n&#8211; \u1ee8ng su\u1ea5t u\u1ed1n: \u03c3 = M\/Zx \u2248 234,000\/7,475 \u2248 31 MPa (<< 0.6\u00d7Rp0.2 c\u1ee7a 304 \u2248 120\u2013130 MPa).\n- \u0110\u1ed9 v\u00f5ng: \u03b4 = 5wL\u2074\/(384EI) = 5\u00d70.30\u00d7(2,500\u2074)\/(384\u00d7193,000\u00d7299,000) \u2248 2.6 mm.\n- Gi\u1edbi h\u1ea1n v\u00f5ng L\/360 = 6.9 mm \u2192 \u0111\u1ea1t y\u00eau c\u1ea7u. K\u1ebft lu\u1eadn: RHS 40x80x1.5 (304) ph\u00f9 h\u1ee3p.\n\n\n\n<h3><span class=\"ez-toc-section\" id=\"Vi_du_2_%E2%80%93_Cot_cao_30_m_chiu_nen_20_kN_lien_ket_khop%E2%80%93khop\"><\/span>V\u00ed d\u1ee5 2 \u2013 C\u1ed9t cao 3.0 m ch\u1ecbu n\u00e9n 20 kN (li\u00ean k\u1ebft kh\u1edbp\u2013kh\u1edbp)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; Ch\u1ecdn s\u01a1 b\u1ed9: SHS 60x60x2.0 (304).<br \/>\n&#8211; H\u00ecnh h\u1ecdc: A \u2248 2\u00d72\u00d7(60+60\u22124) = 464 mm\u00b2; Ix \u2248 260,000 mm\u2074; r = \u221a(I\/A) \u2248 23.7 mm.<br \/>\n&#8211; \u0110\u1ed9 m\u1ea3nh: \u03bb = KL\/r = 3,000\/23.7 \u2248 127.<br \/>\n&#8211; T\u1ea3i Euler: Pcr = \u03c0\u00b2EI\/(KL)\u00b2 \u2248 55 kN. L\u1ea5y h\u1ec7 s\u1ed1 an to\u00e0n ~1.7 \u2192 \u2248 32 kN > 20 kN.<br \/>\n&#8211; \u1ee8ng su\u1ea5t n\u00e9n: \u03c3 = P\/A \u2248 20,000\/464 \u2248 43 MPa (an to\u00e0n). K\u1ebft lu\u1eadn: \u0111\u1ea1t.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Vi_du_3_%E2%80%93_Khung_ke_nhip_10_m_tai_deu_08_kNm\"><\/span>V\u00ed d\u1ee5 3 \u2013 Khung k\u1ec7 nh\u1ecbp 1.0 m, t\u1ea3i \u0111\u1ec1u 0.8 kN\/m<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; \u0110\u1ec1 xu\u1ea5t: SHS 40x40x1.5 (304). T\u00ednh nhanh cho th\u1ea5y \u03c3 v\u00e0 \u03b4 \u0111\u1ec1u d\u01b0\u1edbi gi\u1edbi h\u1ea1n L\/300 trong \u0111a s\u1ed1 c\u1ea5u h\u00ecnh 2 g\u1ed1i \u0111\u1ee1. N\u1ebfu t\u1ea3i t\u1eadp trung ho\u1eb7c va \u0111\u1eadp, t\u0103ng l\u00ean 40x40x2.0.<\/p>\n<h2 id=\"toc-6-do-day-thanh-anh-huong-den-chiu-luc-han-va-tuoi-th\"><span class=\"ez-toc-section\" id=\"Do_day_thanh_anh_huong_den_chiu_luc_han_va_tuoi_tho\"><\/span>\u0110\u1ed9 d\u00e0y th\u00e0nh: \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ecbu l\u1ef1c, h\u00e0n v\u00e0 tu\u1ed5i th\u1ecd<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; T\u0103ng t t\u1eeb 1.2 l\u00ean 1.5 mm c\u00f3 th\u1ec3 t\u0103ng Z 10\u201320% t\u00f9y ti\u1ebft di\u1ec7n; t\u1eeb 1.5 l\u00ean 2.0 mm t\u0103ng \u0111\u00e1ng k\u1ec3 ch\u1ed1ng m\u00f3p c\u1ee5c b\u1ed9 v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng m\u1ed1i h\u00e0n.<br \/>\n&#8211; D\u1ef1 \u00e1n ngo\u00e0i tr\u1eddi\/va \u0111\u1eadp: \u01b0u ti\u00ean t \u22651.5 mm cho d\u1ea7m, \u22652.0 mm cho c\u1ed9t\/\u0111\u1ebf li\u00ean k\u1ebft.<\/p>\n<h2 id=\"toc-7-lua-chon-be-mat-va-xu-ly-sau-gia-cong\"><span class=\"ez-toc-section\" id=\"Lua_chon_be_mat_va_xu_ly_sau_gia_cong\"><\/span>L\u1ef1a ch\u1ecdn b\u1ec1 m\u1eb7t v\u00e0 x\u1eed l\u00fd sau gia c\u00f4ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; B\u1ec1 m\u1eb7t: 2B (ph\u1eb3ng m\u1edd, kinh t\u1ebf), BA (b\u00f3ng g\u01b0\u01a1ng), No.4\/HL (x\u01b0\u1edbc), bead-blast (m\u1edd m\u1ecbn). Ngo\u00e0i tr\u1eddi 304\/316 v\u1edbi No.4\/HL d\u1ec5 che v\u1ebft x\u01b0\u1edbc, \u00edt l\u1ed9 \u1ed1 b\u1ea9n.<br \/>\n&#8211; Sau h\u00e0n: t\u1ea9y m\u1ed1i h\u00e0n (pickling) + th\u1ee5 \u0111\u1ed9ng ho\u00e1 (passivation) b\u1eb1ng gel\/paste chuy\u00ean d\u1ee5ng \u0111\u1ec3 ph\u1ee5c h\u1ed3i l\u1edbp oxit cr\u00f4m b\u1ec1n v\u1eefng, gi\u1ea3m nguy c\u01a1 \u1ed1 tr\u00e0.<\/p>\n<h2 id=\"toc-8-tieu-chuan-kiem-soat-chat-luong-khi-mua\"><span class=\"ez-toc-section\" id=\"Tieu_chuan_%E2%80%93_kiem_soat_chat_luong_khi_mua\"><\/span>Ti\u00eau chu\u1ea9n \u2013 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng khi mua<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; Y\u00eau c\u1ea7u theo ASTM A554 cho h\u1ed9p c\u01a1 kh\u00ed\/trang tr\u00ed: k\u00edch th\u01b0\u1edbc, dung sai, c\u1ea5p b\u1ec1 m\u1eb7t; k\u00e8m ch\u1ee9ng ch\u1ec9 MTC n\u00eau m\u00e1c, th\u00e0nh ph\u1ea7n.<br \/>\n&#8211; Ki\u1ec3m tra th\u1ef1c \u0111\u1ecba:<br \/>\n  &#8211; \u0110o k\u00edch th\u01b0\u1edbc, \u0111\u1ed9 d\u00e0y b\u1eb1ng th\u01b0\u1edbc c\u1eb7p\/si\u00eau \u00e2m \u0111i\u1ec3m ng\u1eabu nhi\u00ean.<br \/>\n  &#8211; Soi m\u1ed1i h\u00e0n d\u1ecdc (ERW\/TIG) \u0111\u1ec1u, kh\u00f4ng b\u1ecdt kh\u00ed, kh\u00f4ng r\u1ed7.<br \/>\n  &#8211; C\u00e2n th\u1eed l\u00f4 h\u00e0ng so v\u1edbi tr\u1ecdng l\u01b0\u1ee3ng l\u00fd thuy\u1ebft: G (kg\/m) \u2248 0.00793\u00d7A(mm\u00b2).<br \/>\n  &#8211; Th\u1eed nam ch\u00e2m nh\u1eb9; test dung d\u1ecbch Mo cho 316 n\u1ebfu c\u1ea7n ph\u00e2n bi\u1ec7t 304\/316.<\/p>\n<h2 id=\"toc-9-toi-uu-chi-phi-va-tinh-san-co-tai-viet-nam\"><span class=\"ez-toc-section\" id=\"Toi_uu_chi_phi_va_tinh_san_co_tai_Viet_Nam\"><\/span>T\u1ed1i \u01b0u chi ph\u00ed v\u00e0 t\u00ednh s\u1eb5n c\u00f3 t\u1ea1i Vi\u1ec7t Nam<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; Quy c\u00e1ch ph\u1ed5 bi\u1ebfn:<br \/>\n  &#8211; SHS: 10&#215;10\u201320&#215;20 (t=0.7\u20131.0), 25&#215;25\u201360&#215;60 (t=1.0\u20132.0), 80&#215;80\u2013100&#215;100 (t=1.5\u20133.0, \u0111\u1eb7t h\u00e0ng).<br \/>\n  &#8211; RHS: 20&#215;40, 25&#215;50, 30&#215;60, 40&#215;80, 50&#215;100 (t=1.0\u20132.0); k\u00edch l\u1edbn h\u01a1n \u0111\u1eb7t h\u00e0ng.<br \/>\n&#8211; Chi\u1ec1u d\u00e0i ti\u00eau chu\u1ea9n: 6 m\/c\u00e2y (ph\u1ed5 bi\u1ebfn). L\u1eadp s\u01a1 \u0111\u1ed3 c\u1eaft \u0111\u1ec3 gi\u1ea3m hao h\u1ee5t.<br \/>\n&#8211; L\u1ef1a ch\u1ecdn m\u00e1c: 201 ti\u1ebft ki\u1ec7m trong nh\u00e0 kh\u00f4; 304 l\u00e0 c\u00e2n b\u1eb1ng cho \u0111a s\u1ed1 ngo\u00e0i tr\u1eddi; 316 cho m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n cao. Thay \u0111\u1ed5i \u0111\u1ed9 d\u00e0y th\u01b0\u1eddng \u1ea3nh h\u01b0\u1edfng chi ph\u00ed nhi\u1ec1u h\u01a1n \u0111\u1ed5i m\u00e1c trong c\u00f9ng nh\u00f3m; c\u1ea7n so s\u00e1nh t\u1ed5ng chi ph\u00ed v\u00f2ng \u0111\u1eddi (b\u1ea3o tr\u00ec, thay th\u1ebf).<\/p>\n<h2 id=\"toc-10-lap-dung-va-chi-tiet-lien-ket-ben-dep\"><span class=\"ez-toc-section\" id=\"Lap_dung_va_chi_tiet_lien_ket_ben_%E2%80%93_dep\"><\/span>L\u1eafp d\u1ef1ng v\u00e0 chi ti\u1ebft li\u00ean k\u1ebft b\u1ec1n \u2013 \u0111\u1eb9p<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; B\u1ea3n m\u00e3 \u0111\u1ebf c\u1ed9t: d\u00f9ng t\u1ea5m inox 6\u201310 mm, h\u00e0n k\u00edn, khoan l\u1ed7 bul\u00f4ng neo; c\u00f3 t\u1ea5m \u0111\u1ec7m \u0111\u1ec3 ph\u00e2n b\u1ed1 t\u1ea3i.<br \/>\n&#8211; Li\u00ean k\u1ebft d\u1ea7m\u2013c\u1ed9t: d\u00f9ng tai\/b\u1ea3n m\u00e3 g\u00f3c 3\u20135 mm, h\u00e0n m\u00e9p \u0111\u1ee7 chi\u1ec1u d\u00e0i; tr\u00e1nh t\u1eadp trung \u1ee9ng su\u1ea5t t\u1ea1i g\u00f3c bo.<br \/>\n&#8211; Ch\u1ed1ng \u0103n m\u00f2n khe: b\u1ecbt \u0111\u1ea7u \u1ed1ng b\u1eb1ng n\u1eafp\/inox h\u00e0n, t\u1ea1o l\u1ed7 tho\u00e1t n\u01b0\u1edbc \u1edf v\u1ecb tr\u00ed k\u00edn.<br \/>\n&#8211; C\u00e1ch ly b\u1ec1 m\u1eb7t khi ti\u1ebfp x\u00fac b\u00ea t\u00f4ng\/g\u1ea1ch ho\u1eb7c kim lo\u1ea1i kh\u00e1c \u0111\u1ec3 h\u1ea1n ch\u1ebf nhi\u1ec5m b\u1ea9n.<\/p>\n<h2 id=\"toc-11-an-toan-va-bao-tri\"><span class=\"ez-toc-section\" id=\"An_toan_va_bao_tri\"><\/span>An to\u00e0n v\u00e0 b\u1ea3o tr\u00ec<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; V\u1ec7 sinh \u0111\u1ecbnh k\u1ef3 b\u1eb1ng n\u01b0\u1edbc s\u1ea1ch\/x\u00e0 ph\u00f2ng trung t\u00ednh; tr\u00e1nh d\u00f9ng b\u00e0n ch\u1ea3i s\u1eaft.<br \/>\n&#8211; Ki\u1ec3m tra chu k\u1ef3 6\u201312 th\u00e1ng: m\u1ed1i h\u00e0n, bul\u00f4ng, bi\u1ebfn d\u1ea1ng v\u00f5ng\/c\u1ed9t; x\u1eed l\u00fd s\u1edbm \u1ed1 b\u1ea9n \u0111\u1ec3 tr\u00e1nh \u0103n m\u00f2n khe.<br \/>\n&#8211; Trong m\u00f4i tr\u01b0\u1eddng bi\u1ec3n: r\u1eeda n\u01b0\u1edbc ng\u1ecdt \u0111\u1ecbnh k\u1ef3 gi\u1ea3m mu\u1ed1i b\u00e1m, t\u0103ng tu\u1ed5i th\u1ecd.<\/p>\n<h2 id=\"toc-12-cac-cau-hoi-thuong-gap-faq\"><span class=\"ez-toc-section\" id=\"Cac_cau_hoi_thuong_gap_FAQ\"><\/span>C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQ)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; Khi n\u00e0o b\u1eaft bu\u1ed9c d\u00f9ng 316? Khi c\u00f3 clorua cao (bi\u1ec3n, h\u1ed3 b\u01a1i, ho\u00e1 ch\u1ea5t), ho\u1eb7c y\u00eau c\u1ea7u b\u1ec1n \u0103n m\u00f2n tuy\u1ec7t \u0111\u1ed1i cho m\u1ed1i h\u00e0n.<br \/>\n&#8211; H\u1ed9p trang tr\u00ed (ASTM A554) c\u00f3 d\u00f9ng cho k\u1ebft c\u1ea5u \u0111\u01b0\u1ee3c kh\u00f4ng? C\u00f3, n\u1ebfu b\u1ea1n ki\u1ec3m tra ch\u1ecbu l\u1ef1c, v\u00f5ng, \u1ed5n \u0111\u1ecbnh \u0111\u1ea7y \u0111\u1ee7. V\u1edbi t\u1ea3i l\u1edbn\/quan tr\u1ecdng, c\u00e2n nh\u1eafc \u0111\u1eb7t \u1ed1ng\/h\u1ed9p theo ti\u00eau chu\u1ea9n k\u1ebft c\u1ea5u v\u00e0 theo thi\u1ebft k\u1ebf \u0111\u01b0\u1ee3c th\u1ea9m tra.<br \/>\n&#8211; C\u00f3 c\u1ea7n s\u01a1n ph\u1ee7 inox? Th\u01b0\u1eddng kh\u00f4ng. Tuy nhi\u00ean, trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t, c\u00f3 th\u1ec3 d\u00f9ng ph\u1ee7 nano\/clear coat \u0111\u1ec3 gi\u1ea3m b\u00e1m b\u1ea9n; kh\u00f4ng thay th\u1ebf \u0111\u01b0\u1ee3c ch\u1ecdn m\u00e1c ph\u00f9 h\u1ee3p.<\/p>\n<h2 id=\"toc-13-tai-lieu-tham-khao\"><span class=\"ez-toc-section\" id=\"Tai_lieu_tham_khao\"><\/span>T\u00e0i li\u1ec7u tham kh\u1ea3o<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; ASTM A554\/A554M \u2013 Welded Stainless Steel Mechanical Tubing: https:\/\/www.astm.org\/a0554_a0554m-22.html<br \/>\n&#8211; Euro Inox\/SCI \u2013 Design Manual for Structural Stainless Steel (edition 3): https:\/\/www.euro-inox.org<br \/>\n&#8211; EN 1993-1-4 (Eurocode 3, Design of steel structures \u2013 Stainless steels)<br \/>\n&#8211; ISO 15510 \u2013 Stainless steels \u2014 Chemical composition<br \/>\n&#8211; Nickel Institute \u2013 Stainless Steel in Structural Applications: https:\/\/nickelinstitute.org<\/p>\n<h2 id=\"toc-14-ket-luan\"><span class=\"ez-toc-section\" id=\"Ket_luan\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; Ch\u1ecdn \u0111\u00fang quy c\u00e1ch h\u1ed9p inox cho khung \u2013 k\u1ebft c\u1ea5u xoay quanh 4 tr\u1ee5 c\u1ed9t: t\u1ea3i v\u00e0 kh\u1ea9u \u0111\u1ed9, m\u00e1c inox theo m\u00f4i tr\u01b0\u1eddng, ki\u1ec3m tra b\u1ec1n\/v\u00f5ng\/\u1ed5n \u0111\u1ecbnh b\u1eb1ng c\u00f4ng th\u1ee9c chu\u1ea9n, v\u00e0 t\u00ednh s\u1eb5n c\u00f3 \u2013 kh\u1ea3 n\u0103ng thi c\u00f4ng.<br \/>\n&#8211; D\u1ea7m\/gi\u1eb1ng n\u00ean \u01b0u ti\u00ean RHS v\u1edbi chi\u1ec1u cao theo ph\u01b0\u01a1ng u\u1ed1n; c\u1ed9t\/khung chung d\u00f9ng SHS\/RHS \u0111\u1ed1i x\u1ee9ng, ki\u1ec3m so\u00e1t \u0111\u1ed9 m\u1ea3nh. \u0110\u1ed9 d\u00e0y t\u1eeb 1.5\u20132.0 mm tr\u1edf l\u00ean cho k\u1ebft c\u1ea5u ngo\u00e0i tr\u1eddi\/va \u0111\u1eadp. M\u00e1c 304 l\u00e0 \u201cm\u1eb7c \u0111\u1ecbnh\u201d ngo\u00e0i tr\u1eddi; 316 cho m\u00f4i tr\u01b0\u1eddng clo\/bi\u1ec3n; 201 ch\u1ee7 y\u1ebfu trong nh\u00e0 kh\u00f4.<br \/>\n&#8211; \u00c1p d\u1ee5ng quy tr\u00ecnh 6 b\u01b0\u1edbc, d\u00f9ng c\u00e1c c\u00f4ng th\u1ee9c v\u00e0 v\u00ed d\u1ee5 tr\u00ean \u0111\u1ec3 t\u1ef1 tin ra quy\u1ebft \u0111\u1ecbnh, \u0111\u1ed3ng th\u1eddi \u0111\u1ed1i chi\u1ebfu ti\u00eau chu\u1ea9n ASTM A554 v\u00e0 h\u01b0\u1edbng d\u1eabn thi\u1ebft k\u1ebf inox.<\/p>\n<p>C\u1ea7n b\u1ea3ng ch\u1ecdn chi ti\u1ebft theo t\u1ea3i v\u00e0 t\u1ed3n kho th\u1ef1c t\u1ebf? Li\u00ean h\u1ec7 Inox C\u01b0\u1eddng Th\u1ecbnh \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n k\u1ef9 thu\u1eadt v\u00e0 b\u00e1o gi\u00e1 t\u1ed1t nh\u1ea5t. Hotline: 0343.417.281. Email: inoxcongnghiep.cuongthinh@gmail.com<\/p>\n","protected":false},"excerpt":{"rendered":"<p>H\u01b0\u1edbng d\u1eabn ch\u1ecdn quy c\u00e1ch inox h\u1ed9p vu\u00f4ng\/ch\u1eef nh\u1eadt cho khung s\u01b0\u1eddn, k\u1ebft c\u1ea5u: k\u00edch th\u01b0\u1edbc\u2013\u0111\u1ed9 d\u00e0y\u2013m\u00e1c 201\/304\/316, t\u00ednh u\u1ed1n\/v\u00f5ng\/c\u1ed9t v\u00e0 ti\u00eau chu\u1ea9n ASTM A554.<\/p>\n","protected":false},"author":7,"featured_media":1060,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2616","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"acf":[],"_links":{"self":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/2616","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/comments?post=2616"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/2616\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1060"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=2616"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=2616"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=2616"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}