cie 430-assignment no. 1-solutions-spring 2014
DESCRIPTION
wood design homework 1TRANSCRIPT
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CIE 430 DESIGN OF WOOD STRUCTURES
SPRING 2014
ASSIGNMENT No. 1
Introduction to Wood Design Due Date:
Problem No. 1 For the house framing section shown in the figure below, determine:
a) The roof dead load, Dq , in pounds per square foot (psf) on a horizontal plane. b) The wall dead load, Dp , in psf of wall surface area. c) The wall dead load, Dw , in pounds per horizontal foot of wall.
(10psf)
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Problem No. 2 For the building framing section shown in the figure below, determine:
a) The roof dead load, rDq , in psf. b) The second-floor dead load, fDq , in psf.
Suspended AcousticalFiber Board System
Movable Steel Partition
Suspended Steel Channel Ceiling System
Suspended AcousticalFiber Board System
Movable Steel Partition
Suspended Steel Channel Ceiling System
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Problem No. 3 The roof framing plan of an industrial building is shown in the figure below. The construction of the roof consists of:
Roofing: 5-ply felt and gravel Sheathing: 15/32-in plywood Subpurlin: 2 x 4 (cross-sectional area = 5.25 in2) at 24 in. o.c. Purlin: - 4 x 14 (cross-sectional area = 46.36 in2) at 8 ft o.c. Girder: 12 x 20 (cross-sectional area = 224.25 in2) at 20 ft o.c.
It can be assumed that the loads are uniformly distributed over the roof surface. Assuming a specific gravity G = 0.5 for the wood members, Find:
a) The average dead load, Dq , over the entire roof in psf b) The tributary dead load, Dw , on the subpurlins in lbs/ft. c) The tributary dead load, Dw , on the purlins in lbs/ft. d) The tributary dead load, Dw , on the girders in lbs/ft. e) The tributary dead load, DC , on column C1 in kips.
12 x 20
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Problem No. 4 The roof framing plan shown in the figure below has girders G1, G2, and G3 supporting gravity loads from the purlins P1. The roof dead load Dq =13 psf, the roof live load is Lq = 15 psf and the roof snow load Sq =20 psf. a) Draw the factored shear and moment diagrams for girder G1 G2, and G3
assuming a series of concentrating reaction loads from the purlins P1. b) Draw the factored shear and moment diagrams for girders G1, G2, and G3
assuming a uniformly distributed load over the entire span (unit load times the tributary width),
c) Compare the results obtained in a) and b) and comment.
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