Current Attempt in Progress The bell-crank mechanism is in equilibrium for an applied load of F₁ = 18 kN applied at A. Assume a=260mm,b=160mm, c = 80mm, and = 50°. Pin B is in a double-shear connection and has a diameter of 28 mm. The bell crank has a thickness of 21 mm. Determine (a) the shear stress in pin B. (b) the bearing stress in the bell crank at B. Bell crank Support bracket A Answers: B a b Tpin Bi MPa Ob = i MPa F2 Current Attempt in Progress An axial load P is supported by a short steel column, which has a cross-sectional area of 10500 mm². If the average normal stress in the steel column must not exceed 120 MPa, determine the minimum required dimension "a" so that the bearing stress between the base plate and the concrete slab does not exceed 24 MPa. ○ 229 mm ○ 165 mm O 312 mm ○ 268 mm ○ 209 mm

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?

Compute the nominal shear strength of an M107.5 of A572 Grad 65 steel.

Verify the value of Zx for a W1850 that is tabulated in the dimensions and properties tables in Part 1 of the Manual.