The 80 lb boy stands on the beam and pulls on the rope with a force of 40 lb. (4)D=0.4 and (4) D = 0.35 between his shoes and the beam. The beam has a weight of 0.641 lb/in all along it's length. Neglect the thickness of the beam. Also neglect the size of the pulleys (i.e. assume the rope acts at points F & G). a) Is the boy stationary or slipping? b) Determine the beam support reactions at A and B. 13 12 56 E Aft

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?