A tensile test was performed on a specimen with a circular c…

A tensile test was performed on a specimen with a circular cross section. The diameter was measured to be 1.140 inch. Two marks were made along the length of the specimen and were measured to be 2.250 inches apart. This distance is defined as the gage length, and all length measurements were made between the two marks. The specimen was loaded to failure. Fracture occurred at a load of 23,500 pounds. The specimen was then reassembled, and the diameter and gage length were measured to be 0.703 inch and 2.535 inches. Determine the elongation as a percentage.

A tensile test was performed on a specimen with a circular c…

A tensile test was performed on a specimen with a circular cross section. The diameter was measured to be 1.180 inch. Two marks were made along the length of the specimen and were measured to be 2.350 inches apart. This distance is defined as the gage length, and all length measurements were made between the two marks. The specimen was loaded to failure. Fracture occurred at a load of 29,000 pounds. The specimen was then reassembled, and the diameter and gage length were measured to be 0.796 inch and 2.565 inches. Determine the elongation as a percentage.

A beam is part of the framing system for the floor of an off…

A beam is part of the framing system for the floor of an office building. The floor is subjected to both dead loads and live loads. The maximum moment caused by the service dead load is 39 ft-kips, and the maximum moment for the service live load is 51 ft-kips (these moments occur at the same location on the beam and can therefore be combined). If LRFD is used, what is the required nominal strength of the beam for a resistance factor φ of 0.65?