Steel Beam Sizes Link to steel section properties look up table: http://www.efunda.com/math/areas/RolledSteelBeamsW.cfm http://www.efunda.com/math/areas/RolledSteelBeamsW.cfm Commonly used steel beam sizes: SizeDepth (d)Width (bf) W10x1910 4 W10x3010 6 W12x2212 4 W12x3512 7 W14x2614 5 W14x3814 7 W14x5314 8 W16x3116 6 W16x5716.5 7 W18x4618 6 W18x7018.5 7 1/2 W21x5721 6 1/2 W21x6821 8 1/4 W24x6224 7 W24x8424 9 W27x9427 10 W30x9930 10 1/2 W33x13033 11 ½ W36x16036 12