Question

Before you calculate the moment capacity for a steel beam, you have to determine the classification of beam.

a. True
b. False

Answer 1

True

Step-by-step explanation:

True - because different classification of steel beam have different yield strength.

The moment capacity for a steel beam is given by;

M = Mn / Ωₙ

where;

M - the maximum moment acting on the beam

Ωₙ - is the Safety Factor for Elements in Bending = 1.67

Mn - nominal moment of the steel, given as

`M_n = Z_x *f_y`

where;

Zₓ - the Plastic Section Modulus in the x or strong axis.

`f_y -` is the Yield Strength of the Steel (A36W, A46 W or A50W)

A36W = 36 ksi

A46 W = 46 ksi

A50W = 50 ksi

Thus, before you calculate the moment capacity for a steel beam, you have to determine the classification of beam, for the yield strength of the steel beam.