Answer:
W18 * 106
Step-by-step explanation:
Section modulus of wide flange = 200 m^3
Determine the value of the lightest beam possible
The lightest beam possible that will satisfy the given condition will have a section modulus ≥ 200m^3 ( note: it will also be the nearest to 200 in^3 )
From Beam Table ; The Lightest beam with its section modulus( 204 in^3) > 200in^3 is W18 * 106