Double Web Beam- AISC Specifications Double Web Beam- AISC Specifications jkaab5 (Structural) (OP) 24 Jun 14 16:23 Solving for the shear strength Vn of a beam with two webs, should the web thickness be doubled because of two webs when performing h/tw? RE: Double Web Beam- AISC Specifications msquared48 (Structural) 24 Jun 14 16:30 O divide the shear load by 2. Is this an HSS tube section? Mike McCann MMC Engineering RE: Double Web Beam- AISC Specifications nutte (Structural) 25 Jun 14 10:15 No. The h/tw check is a buckling check, so you should use the thickness of one web. When figuring the total shear area, you should use two web thicknesses.