Materials for Civil and Construction Engineers (4th Edition)
Materials for Civil and Construction Engineers (4th Edition)
4th Edition
ISBN: 9780134320533
Author: Michael S. Mamlouk, John P. Zaniewski
Publisher: PEARSON
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Chapter 11, Problem 11.12QP
To determine

Describe why engineered wood is stronger and has better properties than natural wood.

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An American Standard Channel shape must resist a factored tensile load. The length is 15 ft, and there will be two lines of 7/8-in. diameter bolts in the web, as shown in the figure below. Estimate the shear lag factor U to be 0.85. (In a practical design, once the member and bolt layout are selected, the value of U could be computed and the member design could be revised if necessary.) Use A36 steel. For the steel Fy = 36 ksi and F₁ = 58 ksi. Try the tension members given in the table below. Tension member A, (in.²) tw (in.) ry (in.) C10 x 20 5.87 0.379 0.690 C3 × 6 1.76 0.356 0.413 C6 × 8.2 2.39 0.200 0.536 C5 × 9 2.64 0.325 0.486 Bolt lines Select an American Standard Channel shape to resist a factored tensile load of 120 kips. A) C10 × 20 B) C3 × 6 C) C6 x 8.2 D) C5 x 9 -Select- V What is the required gross area? (Express your answer to three significant figures.) Ag = in.2 What is the required effective area? (Express your answer to three significant figures.) Ae = in.2 What is…
It proposed to provide pile foundation for a heavy column; the pile group consisting of 4 piles, placed at 2.0 m centre to centre, forming a square pattern. The under-ground soil is clay, having Cu at surface as 60 kN/m², and at depth 10 m, as 100 kN/m². Compute the allowable column load on the pile cap with factor of safety of 3.0, if the piles are circular having diameters 0.5 m each and length as 10 m.
A 12 m long and 300 mm diameter concrete pile is driven in a uniform deposit of sand (p = 36°). The water table is very much down and is not likely to rise in future. The average dry unit weight of sand is 18 kN/m². Calculate the safe load capacity of the pile with factor of safety of 2.5. (use K-1.5 and 8=0.75 q). If the allowable load is increased by 20% what will be the length of the pile.
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