A rigid frame is fabricated by joining the three bars with pins at B, C, and D, as shown in figure. The frame is loaded by the 1000-lb force and the 1200-lb ft couple. The supports consist of a pin at A and a roller support at E. a. Draw the FBD of the frame, neglecting the weights of the members. b. How many unknowns are on the FBD? - 3 ft- 1.5 ft B F 1.5 ft 1000 lb 1200 lb ft A -2 ft→2 ft+2 ft+2 ft--

A plate girder must be designed for the conditions shown in Figure P10.7-4. The given loads are factored, and the uniformly distributed load includes a conservative estimate of the girder weight. Lateral support is provided at the ands and at the load points. Use LRFD for that following: a. Select the, flange and web dimensions so that intermediate stiffeners will he required. Use Fy=50 ksi and a total depth of 50 inches. Bearing stiffeners will be used at the ends and at the load points, but do not proportion them. b. Determine the locations of the intermediate stiffeners, but do not proportion them.

Use an elastic analysis and compute the extra load in the weld (in kips per inch of length) caused by the eccentricity.

A column in a building is subjected to the following load effects: 9 kips compression from dead load 5 kips compression from roof live load 6 kips compression from snow 7 kips compression from 3 inches of rain accumulated on the roof 8 kips compression from wind a. If lead and resistance factor design is used, determine the factored load (required strength) to be used in the design of the column. Which AISC load combination controls? b. What is the required design strength of the Column? c. What is the required nominal strength of the column for a resistance factor of 0.90? d. If allowable strength design is used, determine the required load capacity (required strength) to be used in the design of the column. Which AISC load combination controls? e. What is the required nominal strength of the column for a safety factor of 1.67?