Consider the truss shown in Figure 2. Two loading cases are applied to the joints: (1) approximately 4 kg of load applied at joint "E", (2) approximately 2 kg of load applied at joint "D" and approximately another 2 kg load applied at joint "F". The trusses have six load cells attached to the struts, as depicted in Figure 2 by the shaded rectangles 1-6. The struts are connected through hinges at the joints. Please observe the lab carefully and record data from the loading cells. (a) Construct a 2-D Free Body Diagram (FBD) for the entire truss in Figure 2 and calculate the supporting forces at point "A" and point "I" for these two cases. According to the calculation results of the two cases, discuss the impact of loading location. [20%] (b) Using the method of sections, calculate the forces in the struts with the load cells (1-6) attached for these two cases. [20%] (c) Tabulate the results of both the calculation and the measurement for the two cases. Provide a short discussion of the experimental laboratory for the truss in Figure 2 (half a page maximum) and compare your analytical results at load cells (1-6) with the experimental measurements for the two loading cases. [10%] B' E H 180mm 180mm 180mm

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 45 ft-kips, and the maximum moment for the service live load is 63 ft-kips (these moments occur at the same location on the beam and can therefore be combined). a. If load and resistance factor design is used, determine the maximum factored bending moment (required moment strength). What is the controlling AISC load combination? b. What is the required nominal moment strength for a resistance factor of 0.90? c. If allowable strength design is used, determine the required moment strength. What is the controlling AISC lead combination? d. What is the required nominal moment strength for a safety factor of 1.67?

Determine the smallest value of yield stress Fy, for which a W-, M-, or S-shape from Part 1 of the Manual will become slender. To which shapes does this value apply? What conclusion can you draw from your answer?

A W1422 acts compositely with a 4-inch-thick floor slab whose effective width b is 90 inches. The beams are spaced at 7 feet 6 inches, and the span length is 30 feet. The superimposed loads are as follows: construction load = 20 psf, partition load = 10 psf, weight of ceiling and light fixtures = 5 psf, and live load = 60 psf, A992 steel is used, and fc=4 ksi. Determine whether the flexural strength is adequate. a. Use LRFD. b. Use ASD.