{"id":809,"date":"2026-03-26T04:16:20","date_gmt":"2026-03-26T04:16:20","guid":{"rendered":"https:\/\/www.ledcxr.com\/?p=809"},"modified":"2026-03-26T04:16:20","modified_gmt":"2026-03-26T04:16:20","slug":"the-ultimate-w8-beam-buyers-guide-comparing-sizes-specs-and-load-capacities","status":"publish","type":"post","link":"https:\/\/www.ledcxr.com\/vi\/the-ultimate-w8-beam-buyers-guide-comparing-sizes-specs-and-load-capacities\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn mua d\u1ea7m W8 to\u00e0n di\u1ec7n: So s\u00e1nh k\u00edch th\u01b0\u1edbc, th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i"},"content":{"rendered":"

\u0110i\u1ec1u h\u01b0\u1edbng bi\u1ec3u \u0111\u1ed3 k\u00edch th\u01b0\u1edbc d\u1ea7m W8<\/strong> c\u00f3 th\u1ec3 g\u00e2y kh\u00f3 kh\u0103n ngay c\u1ea3 v\u1edbi nh\u1eefng ng\u01b0\u1eddi mua c\u00f3 kinh nghi\u1ec7m. V\u1edbi c\u00e1c bi\u1ebfn th\u1ec3 t\u1eeb lo\u1ea1i nh\u1eb9 W8x10 \u0111\u1ebfn lo\u1ea1i n\u1eb7ng W8x67, vi\u1ec7c ch\u1ecdn \u0111\u00fang c\u1ea5u ki\u1ec7n \u0111\u00f2i h\u1ecfi nhi\u1ec1u h\u01a1n l\u00e0 ch\u1ec9 ch\u1ecdn m\u1ed9t c\u00e1i t\u00ean t\u1eeb danh s\u00e1ch. H\u01b0\u1edbng d\u1eabn n\u00e0y cung c\u1ea5p m\u1ed9t c\u00e1i nh\u00ecn s\u00e2u v\u1ec1 k\u00edch th\u01b0\u1edbc d\u1ea7m W8<\/strong> v\u00e0 c\u00e1c \u0111\u1eb7c t\u00ednh, gi\u00fap b\u1ea1n \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh mua s\u1eafm s\u00e1ng su\u1ed1t cho d\u1ef1 \u00e1n \u00f4 t\u00f4 ho\u1eb7c c\u00f4ng nghi\u1ec7p ti\u1ebfp theo c\u1ee7a m\u00ecnh.<\/p>\n

\"\"<\/p>\n

Gi\u1ea3i m\u00e3 d\u1ea7m W8: Hi\u1ec3u v\u1ec1 danh ph\u00e1p<\/h2>\n

In the steel industry, “W8” refers to a Wide Flange beam with a nominal depth of 8 inches. However, the second number in the designation is equally critical. For instance, in a t\u00ednh to\u00e1n tr\u1ecdng l\u01b0\u1ee3ng m\u1ed7i foot c\u1ee7a d\u1ea7m W8<\/strong> calculation, a W8x31 means the beam weighs 31 pounds for every foot of length. At GTR, we emphasize that “nominal” does not mean “actual.” Understanding the k\u00edch th\u01b0\u1edbc d\u1ea7m W8 t\u00ednh b\u1eb1ng inch<\/strong> cho t\u1eebng tr\u1ecdng l\u01b0\u1ee3ng c\u1ee5 th\u1ec3 l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c l\u1eafp \u0111\u1eb7t \u00f4 t\u00f4 c\u00f3 kho\u1ea3ng h\u1edf h\u1eb9p.<\/p>\n

Bi\u1ec3u \u0111\u1ed3 k\u00edch th\u01b0\u1edbc d\u1ea7m W8: Ph\u00e2n t\u00edch so s\u00e1nh<\/h2>\n

Khi so s\u00e1nh c\u00e1c k\u00edch th\u01b0\u1edbc d\u1ea7m W8, c\u00e1c y\u1ebfu t\u1ed1 ch\u00ednh c\u1ea7n xem x\u00e9t l\u00e0 m\u00f4 men qu\u00e1n t\u00ednh (Ix) \u0111\u1ec3 ch\u1ed1ng u\u1ed1n v\u00e0 t\u1ed5ng chi\u1ec1u cao. M\u1eb7c d\u00f9 t\u1ea5t c\u1ea3 c\u00e1c d\u1ea7m W8 c\u00f3 c\u1ea5u tr\u00fac t\u01b0\u01a1ng t\u1ef1 nhau, kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i c\u1ee7a ch\u00fang thay \u0111\u1ed5i h\u01a1n 500% gi\u1eefa c\u00e1c m\u1eb7t c\u1eaft nh\u1eb9 nh\u1ea5t v\u00e0 n\u1eb7ng nh\u1ea5t.<\/strong><\/p>\n\n\n\n\n\n\n\n\n
M\u1eb7t c\u1eaft<\/th>\nChi\u1ec1u cao (in)<\/th>\nChi\u1ec1u r\u1ed9ng m\u1eb7t b\u00edch (in)<\/th>\nM\u00f4 men qu\u00e1n t\u00ednh (Ix) (in^4)<\/th>\nM\u00f4 \u0111un ti\u1ebft di\u1ec7n (Sx) (in^3)<\/th>\n<\/tr>\n<\/thead>\n
W8 x 10<\/td>\n7.89<\/td>\n3.94<\/td>\n30.8<\/td>\n7.81<\/td>\n<\/tr>\n
W8 x 18<\/td>\n8.14<\/td>\n5.25<\/td>\n61.9<\/td>\n15.2<\/td>\n<\/tr>\n
W8 x 24<\/td>\n7.93<\/td>\n6.495<\/td>\n82.7<\/td>\n20.9<\/td>\n<\/tr>\n
W8 x 40<\/td>\n8.25<\/td>\n8.07<\/td>\n146.0<\/td>\n35.5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C\u00e1c y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh ch\u00ednh: Ch\u1ecdn d\u1ea7m W8 n\u00e0o ph\u00f9 h\u1ee3p v\u1edbi b\u1ea1n?<\/h2>\n

D\u1ef1a tr\u00ean nhi\u1ec1u n\u0103m kinh nghi\u1ec7m s\u1ea3n xu\u1ea5t v\u00e0 th\u01b0\u01a1ng m\u1ea1i, ch\u00fang t\u00f4i khuy\u00ean b\u1ea1n n\u00ean \u0111\u00e1nh gi\u00e1 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt d\u1ea7m w8<\/strong> theo b\u1ed1n ti\u00eau ch\u00ed quan tr\u1ecdng sau:<\/p>\n

    \n
  1. Kho\u1ea3ng kh\u00f4ng k\u1ebft c\u1ea5u:<\/strong> N\u1ebfu b\u1ea1n l\u1eafp \u0111\u1eb7t h\u1ec7 th\u1ed1ng \u0111\u00e8n LED ho\u1eb7c ray treo, h\u00e3y ki\u1ec3m tra chi\u1ec1u cao th\u1ef1c t\u1ebf. D\u1ea7m W8x40 s\u00e2u h\u01a1n g\u1ea7n 0,4 inch so v\u1edbi W8x10.<\/li>\n
  2. \u1ed4n \u0111\u1ecbnh ngang:<\/strong> D\u1ea7m c\u00f3 m\u1eb7t b\u00edch r\u1ed9ng h\u01a1n (nh\u01b0 W8x31) c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng xo\u1eafn t\u1ed1t h\u01a1n so v\u1edbi c\u00e1c phi\u00ean b\u1ea3n m\u1eb7t b\u00edch h\u1eb9p nh\u01b0 W8x10.<\/li>\n
  3. T\u1ef7 l\u1ec7 nh\u1ecbp tr\u00ean t\u1ea3i tr\u1ecdng:<\/strong> Tham kh\u1ea3o \u00fd ki\u1ebfn chuy\u00ean gia bi\u1ec3u \u0111\u1ed3 nh\u1ecbp d\u1ea7m w8<\/strong> to ensure the beam won’t bounce. Excessive vibration can shorten the lifespan of high-end automotive electronics and lighting.<\/li>\n
  4. Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n:<\/strong> \u0110\u1ed1i v\u1edbi m\u00f4i tr\u01b0\u1eddng ngo\u00e0i tr\u1eddi ho\u1eb7c khu v\u1ef1c r\u1eeda xe, h\u00e3y \u0111\u1ea3m b\u1ea3o d\u1ea7m w8<\/strong> c\u1ee7a b\u1ea1n \u0111\u01b0\u1ee3c m\u1ea1 k\u1ebdm nh\u00fang n\u00f3ng ho\u1eb7c s\u01a1n l\u00f3t \u0111\u1ec3 b\u1ea3o v\u1ec7 \u0111\u1eb7c t\u00ednh d\u1ea7m w8<\/strong> kh\u1ecfi s\u1ef1 xu\u1ed1ng c\u1ea5p.<\/li>\n<\/ol>\n

    Expert Insider: Avoiding the “Over-Spec” Trap<\/h2>\n

    In our engineering testing at GTR, we often find that clients assume a heavier beam is always “safer.” However, using a W8x48 when a W8x18 suffices adds 30 lbs of dead weight per foot. Over a 20-foot span, that is 600 lbs of unnecessary weight that your columns and footings must support. Always refer to the bi\u1ec3u \u0111\u1ed3 d\u1ea7m w8<\/strong> \u0111\u1ec3 t\u00ecm m\u1eb7t c\u1eaft hi\u1ec7u qu\u1ea3 nh\u1ea5t \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u h\u1ec7 s\u1ed1 an to\u00e0n c\u1ee7a b\u1ea1n.<\/p>\n

    T\u1ea1i sao n\u00ean \u0111\u1eb7t h\u00e0ng qua GTR?<\/h2>\n

    Trong b\u1ed1i c\u1ea3nh B2B c\u1ea1nh tranh c\u1ee7a c\u00e1c linh ki\u1ec7n \u00f4 t\u00f4 v\u00e0 c\u00f4ng nghi\u1ec7p, GTR n\u1ed5i b\u1eadt b\u1eb1ng c\u00e1ch thu h\u1eb9p kho\u1ea3ng c\u00e1ch gi\u1eefa th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt k\u1ebft c\u1ea5u th\u00f4 v\u00e0 \u1ee9ng d\u1ee5ng ch\u1ee9c n\u0103ng. Ch\u00fang t\u00f4i hi\u1ec3u c\u00e1ch k\u00edch th\u01b0\u1edbc d\u1ea7m W8<\/strong> t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn vi\u1ec7c l\u1eafp \u0111\u1eb7t h\u1ec7 th\u1ed1ng chi\u1ebfu s\u00e1ng v\u00e0 c\u01a1 kh\u00ed chuy\u00ean d\u1ee5ng. S\u1ea3n ph\u1ea9m c\u1ee7a ch\u00fang t\u00f4i \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 t\u00edch h\u1ee3p li\u1ec1n m\u1ea1ch v\u1edbi th\u00e9p k\u1ebft c\u1ea5u ti\u00eau chu\u1ea9n, \u0111\u1ea3m b\u1ea3o r\u1eb1ng d\u1ea7m w8<\/strong> l\u1ef1a ch\u1ecdn c\u1ee7a b\u1ea1n h\u1ed7 tr\u1ee3 t\u1ea7m nh\u00ecn c\u1ee7a b\u1ea1n m\u00e0 kh\u00f4ng c\u00f3 s\u1ef1 th\u1ecfa hi\u1ec7p.<\/p>\n

    C\u00e1c c\u00e2u h\u1ecfi k\u1ef9 thu\u1eadt ph\u1ed5 bi\u1ebfn v\u1ec1 d\u1ea7m W8<\/h3>\n

    K\u00edch th\u01b0\u1edbc c\u1ee7a d\u1ea7m W8x13 l\u00e0 bao nhi\u00eau?<\/h3>\n

    D\u1ea7m W8x13 c\u00f3 chi\u1ec1u cao 7,99 inch, chi\u1ec1u r\u1ed9ng m\u1eb7t b\u00edch 4,00 inch v\u00e0 \u0111\u1ed9 d\u00e0y b\u1ea3n b\u1ee5ng 0,230 inch. \u0110\u00e2y l\u00e0 l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn cho vi\u1ec7c gi\u1eb1ng ch\u1ecbu t\u1ea3i trung b\u00ecnh.<\/p>\n

    T\u00f4i c\u00f3 th\u1ec3 t\u00ecm b\u1ea3ng th\u00f4ng s\u1ed1 \u0111\u1ea7y \u0111\u1ee7 c\u1ee7a d\u1ea7m w8 \u1edf \u0111\u00e2u?<\/h3>\n

    C\u00e1c b\u1ea3ng \u0111\u1ea7y \u0111\u1ee7 \u0111\u01b0\u1ee3c cung c\u1ea5p b\u1edfi c\u00e1c ti\u00eau chu\u1ea9n ASTM International<\/a> . Tuy nhi\u00ean, GTR cung c\u1ea5p c\u00e1c bi\u1ec3u \u0111\u1ed3 \u0111\u01a1n gi\u1ea3n h\u00f3a \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf ri\u00eang cho c\u00e1c d\u1ef1 \u00e1n c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng \u00f4 t\u00f4 v\u00e0 chi\u1ebfu s\u00e1ng.<\/p>\n

    S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa d\u1ea7m W v\u00e0 d\u1ea7m ch\u1eef I l\u00e0 g\u00ec?<\/h3>\n

    D\u1ea7m W (m\u1eb7t b\u00edch r\u1ed9ng) c\u00f3 m\u1eb7t b\u00edch g\u1ea7n nh\u01b0 song song, trong khi d\u1ea7m ch\u1eef I truy\u1ec1n th\u1ed1ng (d\u1ea7m S) c\u00f3 m\u1eb7t b\u00edch v\u00e1t. D\u1ea7m W nh\u01b0 d\u1ea7m w8<\/strong> th\u01b0\u1eddng hi\u1ec7u qu\u1ea3 h\u01a1n cho h\u1ea7u h\u1ebft c\u00e1c c\u00f4ng tr\u00ecnh hi\u1ec7n \u0111\u1ea1i.<\/p>\n

    Ready to optimize your project? Don’t let improper specs hold you back. View our full range of industrial solutions and technical guides at ledcxr.com<\/a>. Li\u00ean h\u1ec7 v\u1edbi \u0111\u1ed9i ng\u0169 k\u1ef9 thu\u1eadt c\u1ee7a ch\u00fang t\u00f4i ngay h\u00f4m nay \u0111\u1ec3 \u0111\u01b0\u1ee3c b\u00e1o gi\u00e1 ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u k\u1ef9 thu\u1eadt ch\u00ednh x\u00e1c c\u1ee7a b\u1ea1n.<\/strong><\/p>","protected":false},"excerpt":{"rendered":"

    Navigating the w8 beam size chart can be overwhelming for even experienced buyers. 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