Building Structures - Solutions for Exam 3 | ARCH 4075, Exams of Structures and Materials

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Building Structures 1 Test No. 3 May 2, 2005 NAME: WD: Notes: 1. Write and sign “I have neither given nor received unauthorized assistance on this test”. 2. Do not separate the exam sheets and use them to answer the questions. Figures below show the framing plan and elevation of a single-story building. The roof has a dead load of 20 psf (including the weight of joists and beams). The roof snow load is 25 psf. Answer the following questions: Problem Qne (50 pts. Check the simply-supported 2X6 wood joists (J-1) at every 16" are used as shown on the roof plan. Consider moment, shear, and deflection, Joists are made of Douglas Fir with F,=1,450 psi, F=95 psi, and E=1,900,000 psi. M.C.<19%, and the allowable total load deflection is span/360. DO NOT REDUCE LIVE LOAD! Problem Two (50 pts. Design the steel column (B-1) as shown on the framing plan. The building has braced frames along lines A and D,-and moment frames along lines 1 and 2 as shown. The connection of column to the foundation is fixed, and the roof beams provide pin support against buckling about the minor axis, and fixed support against buckling about the major axis. Use A36 steel. DO NOT REDUCE LIVE LODE! S ® @ 3o!.0" fa2, Ao” T 4 SEQOAL SPACES 7 4 “FEBUAL SPACES th . “ttt bh tty qT) a] TP. ~Z ¥ Yael eri sfF |i i ® t VW 8 wt X ™ East Erevatiol. Sout Etevanioal Problem Three (10 pts) [Extra Credit) Discuss the advantages and disadvantages of the different lateral force resisting systems in building structures.