Question: 1. A surveyor's steel tape has a cross-sectional area of 0.016 in.2 and is exactly 100.00 ft long at 70°F under a tensile pull of 15.0 lb. Compute the pull required to make it 100.00 ft long at 25°F.
2. A 1-in.-diameter ASTM A36 steel tie rod, 30 ft long, is used to tie together two walls of a building. The rod is tensioned to 10,000 lb. Compute the tensile stress in the rod if the temperature rises by 30 degrees and if it falls by 50 degrees. Assume that the walls do not move.