ARC322 Quiz 4 KEY

# ARC322 Quiz 4 KEY - length What is its maximum moment No...

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ARC322 Quiz 4 10 Points Name ________ KEY __________ Place your final answers in the boxes provided. 1. A simple steel beam carries a uniformly distributed load of 1235 lb/ft in a 25 ft span. What is the required section modulus? No sketch required. M = w L 2 /8 = (1235 lb/ft(25 ft) 2 )/8 = 96,484 ft-lb S = M/ f = (96,484 ft-lb x 12 in/ft)/24,000 lb/in 2 = 2. A cantilevered steel beam with a length of 9 ft carries a point load of 1750 lb 3 ft from the free end of the beam. What is the required section modulus? No sketch required. M = PL = 1750 lb x 6 ft = 10,500 ft-lb S = M/ f = (10,500 ft-lb x 12 in/ft)/24,000 lb/in 2 = 3. A cantilevered steel beam has a length of 13 ft and carries a uniformly distributed load of 550 lb/ft across its entire
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Unformatted text preview: length. What is its maximum moment? No sketch required. M = w L 2 /2 = (550 lb/ft x (13 ft) 2 )/2 = 4. A simple steel beam spans 32 ft. It carries a point load of 5,500 lb 10 ft from R 1 . What are R 1 and R 2 ? No Sketch required. R 1 = Pb/L = (5500 lb x (32 ft – 10 ft))/32 ft = R 2 = Pa/L = (5500 lb x (32 ft – 20 ft))/32 ft = 5. What is the maximum moment for the beam in Question 4? No Sketch required. M = Pab/L = (5500 lb x 10 ft x 22 ft)/32 ft = Required S = 48.24 in 3 Required S = 5.25 in 3 46,475 ft-lb R 2 = 1,718.75 lb M = 37,812.5 lb R 1 = 3,781.25 lb...
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