4 SELECT THE LIGHTEST W SHAPE LATERAL SUPPORTS ARE PROVIDED

4. SELECT THE LIGHTEST W SHAPE, LATERAL SUPPORTS ARE PROVIDED ONLY AT THE ENDS 10 L00 lo 2D 20k is TYPE A TYPE B

type A , axial force = 100k

moment = 8*15/4 =30kft

unbraced length = 15\'

section size = find the relevant section from AISC satisfying above criteria

type B , axial force = 20k

moment = 8*15/4 =20kft

unbraced length = 10\'

section size = find the relevant section from AISC satisfying above criteria