12-39. The double-web girder is constructed from twoplywood sheets that are secured to wood members at its topand bottom. If each fastener can support 3 kN in singleshear, determine the required spacing s of the fastenersneeded to support the loading P= is kN. Assume A ispinned and B is a raller.S0 mmIso mm250 mm-1.2|50 mms0 mmHIso mmF12 mm12 mm

Answered: Image /qna-images/answer/1357f47a-afc9-4303-a656-b66aa6c303cb.jpg

Answered: 12-39. The double-web girder is…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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The wide-flange pinned-end column shown in the figure carries two loads, a force acting at the centroid P₁ = 450kN and a force P₂ = 270kN acting at distance s = 100 mm, from the centroid. The column is an HE 240B shape with L = 4.2m, E = 200 GPa, and Oy = 290 MPa. (a) What is the maximum compressive stress in the column?
Q4. [TYPE C] A loaded K-truss is supported by a roller at A and a pin at G as shown. Determine the force in members LM, MK, KC, and BC of the K-truss, and state whether they are in tension (T) or compression (C), or whether it is a zero-force member (ZFM). 500 lb 2 ft 2 ft A © 2023 Shanbe Huang 3 ft B K 3 ft M N C 3 ft D 3 ft P 3 ft H E F 3 ft G
Design all Tension members of the truss. Use A36 steel type. Dead Loads and Live loads are shown in the Figure (P1, P2, Pa) & given in the Table. EACH STUDENT HAS DIFFERENT DEAD AND LIVE LOADS. Use load combination 1.2PD+ 1.6PL for LRFD. Use W-shape for the horizontal members and double angle shape for the other members. P1 P2 P3 P2 P1 5 ft -5@10 ft 50 ft- • Given: PA 24 | LL. Fi 26 | 36 CS Scanned with CamScanner
Rigid bar ABC is supported by member (1) at B and by a pin connection at C. Member (1) has a cross sectional area of 1.40 in.2 and a yield strength of 43 ksi. The pins at B, C, and D each have a diameter of 0.4 in. and an ultimate shear strength of 70 ksi. Each pin connection is a double-shear connection. Specifications call for a minimum factor of safety in member (1) of 1.8 with respect to its yield strength. The minimum factor of safety required for pins B, C, and D is 2.9 with respect to the pin ultimate shear strength. Determine the allowable load P that may be applied to the rigid bar at A. Use overall dimensions of a = 63 in. and b = 129 in.
2 kN The beam is made of three boards nailed together to form the double-T cross section shown. If the allowable shear force in each nail is 400 N, determine (a) the absolute maximum shear stress in the wood, B (b) the required spacing s, of the nails between A and B, 2 m 1 m (c) the required spacing sy of the nails between B and C. -150 mm- T25 mm 200 mm 25 mm 25 mm
Rigid bar ABC is supported by member (1) at B and by a pin connection at C. Member (1) has a cross sectional area of 1.00 in.² and a yield strength of 33 ksi. The pins at B, C, and D each have a diameter of 0.3 in. and an ultimate shear strength of 78 ksi. Each pin connection is a double-shear connection. Specifications call for a minimum factor of safety in member (1) of 1.3 with respect to its yield strength. The minimum factor of safety required for pins B, C, and D is 2.8 with respect to the pin ultimate shear strength. Determine the allowable load P that may be applied to the rigid bar at A. Use overall dimensions of a = 57 in. and b = 117 in. a b B kips P Answer: Pallow= i
3.8-4 Design the tension members of the roof truss shown in Figure P3.8-4. Use double-angle shapes throughout and assume 8-inch-thick gusset plates and welded connections. Assume a shear lag factor of U = 0.85. The trusses are spaced at 25 feet. Use A572 Grade 50 steel and design for the following loads. Metal deck: 4 psf of roof surface Build-up roof: 12 psf of roof surface Purlins: 6 psf of roof surface (estimated) Snow: 18 psf of horizontal projection Truss weight: 5 psf of horizontal projection (estimated) a. Use LPER htp://www.jamarana.com b. Use ASD. 8' 8 @ 10' = 80' FIGURE P3.8-4 www
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2. Calculate the internal forces in the bar GF and GD in a roof truss as shownbelow. For each bar, indicate if the internal force is tensile or compressive. Usethe section method (snittmetoden). Point A has simple support and D has rollersupport.
Rigid bar ABC is supported by member (1) at B and by a pin connection at C. Member (1) has a cross sectional area of 1.35 in.² and a yield strength of 45 ksi. The pins at B, C, and D each have a diameter of 0.7 in. and an ultimate shear strength of 78 ksi. Each pin connection is a double-shear connection. Specifications call for a minimum factor of safety in member (1) of 1.5 with respect to its yield strength. The minimum factor of safety required for pins B, C, and D is 2.9 with respect to the pin ultimate shear strength. Determine the allowable load P that may be applied to the rigid bar at A. Use overall dimensions of a = 46 in. and b = 94 in. D (1) b A kips P Answer: Pallow= i a B

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