Test 3 Solved | Building Structures | ARCH 4075, Exams of Structures and Materials

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A ae Building Structures 1 May 3, 2013 NAN eo Notes: 1. Write and sign “I have neither given nor received unauthorized assistance on this test”. Do not seprrate the exam sheets and use them to answer the questions. 3. You can only use your own notes and books during the test. nv Figures below show the framing plan of the roof of a building, The dead load is 10 psf (including the weight of joists and beams) and the snow load is 20 psf. Answer the following questions: Problem One (50 pts. Design the wood joists (J-1) located at every 16” as shown on the plan. Consider moment, shear and deflection. Assume the joists are made of Douglas Fir with F, = 1,000 psi, Fy= 80 psi, and E = 1,300,000 psi, M.C.<19%, and the allowable live load deflection is span/180. Problem Two (50 pis.) Check if the 3-1/8"x 19-1/2” glue-l F, = 2,800 psi, I’, = 240 psi. M.C. aminated wood beam (B-1) as shown on the plan is adequate. Assume 19%, Consider moment and shear ONLY. joke 2 40!-0" i 4040" pes] G cB-15 l “1 - a | | | : a =| | | | i BIE | | : i] ian ] | +h ce Ce-15 ~ Crp PLAAI - i “ie” woop pests ( Typ.) Vl typ) ooo (=) Ce-1) cetion, AA