Effective Width of Beam 1). Interior beam, the less of: beam span / 4 Average of the adjacent supports 2). Edge beam, the less of: beam span /10 + width of steel beam 0.5 times the clear distance between beams + width of beam Stud Requirements tc > 65mm hs / ds >= 4, ds <= 2.5t, t - thickness of steel flange tc >= 30 + hs