Question

P9.047 GO Multipart Part 1 А box beam is fabricated from two plywood webs that are secured to dimension lumber boards at its top and bottom flanges. The beam supports a concentrated load of P-5000 lb at the center of a span of length L 12 ft. The cross section dimensions are shown where h1 = 17 in h2 4.5 in, b1 3.0 in, and b2-1.00 in. Bolts %-in. diameter) connect the plywood webs and the lumber flanges at a spacing of s 10.5 in. along the span. Supports A and C can be idealized as a pin and a roller, respectively. Determine (a) the maximum horizontal shear stress in the plywood webs. (b) the average shear stress in the bolts. (c) the maximum bending stress in the lumber flanges. Plywood webs h2 Determine the moment of inertia 12 for the cross-section about the z centroidal axis. Answer: I the tolerance is +/-296 Click if you would like to Show Work for this question: in. Show Work Attempts: Unlimited SUBMIT ANSWER SAVE FOR LATER Part 2 Calculate the magnitude of the internal shear force in the beam Answer: V lb. Part 3 Determine the maximum value of Q for the cross-section Answer: Qmax the tolerance is +1-2% in. Attempts: Unlimited SAVE FOR LATER SUBMIT ANSWER SUBMIT ANSWER Part 4 Determine the maximum horizontal shear stress in the plywood webs. Answer: Tmax= the tolerance is +/-2% Click if you would like to Show Work for this question: Open Show Work psi Attempts: Unlimited SAVE FOR LATER SUBMIT ANSWER Part 5 Determine the first moment of area Q for the lumber boards that comprise the top flange. Answer: Qnlange the tolerance is +/-2% Click if you would like to Show Work for this question: Open Show Work in. Attempts: UnlimitedSAVE FOR LATER SUBMIT ANSWER SUBMIT ANSWER Part 6 Determine the shear flow q that must be transmitted through the bolt that holds the top flange in place between both plywood webs. Answer: q the tolerance is +/-2% Click if you would like to Show Work for this question: Open Show Work lb/in Attempts: Unlimited SAVE FOR LATER SUBMIT ANSWER Part 7 Determine the force Vf carried by one bolt. Answer: V the tolerance is +-2% Click if you would like to Show Work for this question: lb/bolt Open Show Work Attempts: Unlimited SAVE FOR LATER SUBMT ANSWER Part 8 Determine the bolt cross-sectional area. Answer: Abolt the tolerance is -2% Click if you would like to Show Work for this question: in. Open Show work Attempts: Unlimited SAVE FOR LATER SUBMIT ANSWER Part 9 Determine the average shear stress in the bolts. Answer: Tbolt the tolerance is +/-296 Click if you would like to Show Work for this question: psi Show Work Attempts: Unlimited SAVE FOR LATER SUBMIT ANSWER Part 10 Determine the maximum moment in the beam. Answer: Mmax = the tolerance is +/-296 Click if you would like to Show Work for this question: lb-in. Attempts: Unlimited SAVE FOR LATER SUBMIT ANSWER Part 11 Determine the maximum bending stress in the lumber flanges. Answer: Ơmax the tolerance is +/-296 Click if you would like to Show Work for this question: psi. Show Work SUBMIT ANSWER Attempts: Unlimited SAVE FOR LATER

Answer 1

u S 12 l 2 LiM 2 3 lul ct