Materials for Civil and Construction Engineers (2nd Edition)
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ISBN: 9781292154411
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Chapter 10, Problem 10.3QP
To determine
Selection of wood sample for construction based on the specific gravity value.
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A simple lab test for specific gravity (SG), on two samples of timber indicate thatsample A has SG=0.4 and sample B has SG=0.5. Based on this information alone,which wood sample would you choose as a structural member for your constructionproject? Briefly explain your reason.
If other factors are equal, which piece of lumber is weaker: one with a slope of grain of 1 in 5 or one with a slope of grain of 1in 6?
C O N S T R U C T I O N M A T E R I A L S A N D T E S T I N G
not less than 3 sentences
Differentiate softwood from hardwood.
What is wood seasoning? Why do wood need to be seasoned?
Explain the classification of wood production.
Chapter 10 Solutions
Materials for Civil and Construction Engineers (2nd Edition)
Ch. 10 - What are the two main classes of wood? What is the...Ch. 10 - Prob. 10.2QPCh. 10 - Prob. 10.3QPCh. 10 - Discuss the anisotropic nature of wood. How does...Ch. 10 - Prob. 10.5QPCh. 10 - Prob. 10.6QPCh. 10 - Prob. 10.7QPCh. 10 - Prob. 10.8QPCh. 10 - Prob. 10.9QPCh. 10 - Prob. 10.10QP
Ch. 10 - Prob. 10.11QPCh. 10 - Prob. 10.12QPCh. 10 - Prob. 10.13QPCh. 10 - Prob. 10.14QPCh. 10 - Prob. 10.15QPCh. 10 - Prob. 10.16QPCh. 10 - Prob. 10.17QPCh. 10 - Prob. 10.18QPCh. 10 - Prob. 10.19QPCh. 10 - Prob. 10.20QPCh. 10 - Prob. 10.21QPCh. 10 - Prob. 10.22QPCh. 10 - Prob. 10.23QPCh. 10 - A wood specimen was prepared with actual...Ch. 10 - A pine wood specimen was prepared with actual...Ch. 10 - Prob. 10.26QPCh. 10 - Prob. 10.27QPCh. 10 - Prob. 10.28QPCh. 10 - Prob. 10.29QPCh. 10 - Prob. 10.30QPCh. 10 - Prob. 10.31QPCh. 10 - Prob. 10.32QPCh. 10 - Prob. 10.33QP
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- What is the fiber saturation point? What is the effect of the fiber saturationpoint on the shrinkage of wood in the different directions? How does thisphenomenon affect the properties of lumber?arrow_forwardWhy are the actual dimensions of lumber different from the nominal dimen-sions? Explain.arrow_forwardA 100 mm * 100 mm wood lumber was subjected to bending with a span of 1.5 m until failure by applying a load in the middle of its span. The load and the deflection in the middle of the span were recorded as shown in Table P10.21. a. Using a computer spreadsheet program, plot the load–deflection relationship. b. Plot the proportional limit on the graph. c. Calculate the modulus of rupture (flexure strength).arrow_forward
- How does fiber saturation point phenomenon affect the properties of lumber?arrow_forwardA wood specimen was subjected to bending until failure by applying a loadin the middle of its span. The specimen has a cross section of 1 in. * 1 in.(actual dimensions) and a span of 14 in. between the simple supports. Theload and the deflection in the middle of the span were recorded as shown inTable P10.22.a. Using a computer spreadsheet program, plot the load–deflectionrelationship.b. Plot the proportional limit on the graph.c. Calculate the modulus of rupture (flexure strength).arrow_forwardWhat is the size factor for bending of 4x10 dimension lumber?CF=_______arrow_forward
- A wood specimen was subjected to bending until failure by applying a load inthe middle of its span. The specimen has a cross section of 25 mm * 25 mm(actual dimensions) and a span of 350 mm between the simple supports. Theload and the deflection in the middle of the span were recorded as shown inTable P10.22.a. Using a computer spreadsheet program, plot the load–deflectionrelationship.b. Plot the proportional limit on the graph.c. Calculate the modulus of rupture (flexure strength).arrow_forwardWhat is the typical load duration used in designing wood structures? If awood beam is designed for use at a one-week event only, should the designer increase or decrease the allowable fiber stress relative to the allowable stress used for normal applications? How much increase or decrease?arrow_forward
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