Question

Determine the reactions for the simply supported beam of Figure.

Answer 1

Taking moments about B gives:

R_A × 4 m + 8 kN m = 10 kN m + 6 kN m

i.e. 4R_A = 10 + 6 − 8 = 8 

from which, R_A = 8/4 = 2 kN

Resolving forces vertically gives:

R_A + R_B = 0

from which, R_B = −R_A = −2 kN