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W Steel Beams - Allowable Uniform Loads

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W flange beams and allowable uniform load.

Note that these calculations are rather conservative - based on steel with yield strength 36 ksi and the ASD - Allowable Stress Design - method. It is also common to use steel with yield strength 50 ksi and also the LRFD - Load and Resistance Factor Design - method.

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W Steel Beams - Uniform Loads
Designation (Width x lbs/ft)Nominal Size - Depth x Width (inches x inches)Allowable Uniform Load (lb)
Span (ft)
8101214161820222426
W8 x 10 8 x 4 15600 12500 10400 8900 7800 6900
W8 x 13 8 x 4 19900 15900 13300 11400 9900 8800
W8 x 15 8 x 4 23600 18900 15800 13500 11800 10500
W8 x 18 8 x 5 1/2 30400 24300 20300 17400 15200 13500
W8 x 21 8 x 5 1/2 36400 29100 24300 20800 18200 16200
W8 x 24 8 x 6 1/2 41800 33400 27800 23900 20900 18600
W8 x 28 8 x 6 1/2 48600 38900 32400 27800 24300 21600
W10 x 22 10 x 5 3/4 30900 26500 23200 20600 18600 16900
W10 x 26 10 x 5 3/4 37200 31900 27900 24800 22300 20300
W10 x 30  10 x 5 3/4 43200 37000 32400 28800 25900 23600
W12 x 26 12 x 6 1/2 33400 29700 26700 24300 22300 20500
W12 x 30 12 x 6 1/2 38600 34300 30900 28100 25800 23800
W12 x 35 12 x 6 1/2 45600 40600 36500 33200 30400 28100
  • 1 in = 25.4 mm
  • 1 ft = 0.3048 m
  • 1 lbf (Pound force) = 4.45 N

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