Week 1 Challenge

1).In pratt truss diagonal members are in tension and vertical members in compression due to gravity loads and load transfer on bottom chord member effortlessly.so,truss A is the most efficient in carrying gravity loads.

5). Change in length = coifficient of thermal expansion x original length x change in temparature = 12x10^-6/°C x 2000 x 40

= 0.96 m