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 10, Problem 10.27QP
To determine
The maximum load applied to the column.
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The grains of wood in the board make an angle of 20°
with the horizontal as shown. The board is subjected to
an axial load of P = 300 N. (Figure 1)
Part A
Determine the normal stress that acts perpendicular to the grains.
Express your answer to three significant figures and include the appropriate units.
µA
Value
Units
Submit
Request Answer
Figure
< 1 of 1
Part B
Determine the shear stress that acts parallel to the grains.
Express your answer to three significant figures and include the appropriate units.
HA
-300 mm
160 mm
Ta'y =
Value
Units
20°
25 mm1
Submit
Request Answer
A short round wood column with an actual diameter of 250 mm is to be con-structed. If the failure stress is 29.6 MPa, what is the maximum load that can
be applied to this column, using a factor of safety of 1.3?
1. What is the formula for maximum steel ratio rho max under the latest ACI Code being used in the 2015 NSCP? If fy = 275MPa, f'c = 21 MPa, compare the values of rho max under 2001 NSCP and 2015 NSCP. Which is higher?
2. How do we determine the length of the "confinement zone" for special spacing requirements of stirrups in a beam due to seismic (earthquake) conditions?
Chapter 10 Solutions
Materials for Civil and Construction Engineers (4th 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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- The grains of wood in the board make an angle of 20° with the horizontal as shown. The board is subjected to an axial load of P = 250 N . (Figure 1) Part A Determine the normal stress that acts perpendicular to the grains. Express your answer to three significant figures and include the appropriate units. µA Value Units Figure 1 of 1 Submit Request Answer Part B 300 mm Determine the shear stress that acts parallel to the grains. 60 mm Express your answer to three significant figures and include the appropriate units. 20° 25 mm HẢ ? Value Units P Pearsonarrow_forwardCalculate the tensile steel stress of 5-16-mm-dia rebars in a concrete beam 250 mm by 460 mm at ultimate stage if f'c = 24 MPa and fy = 420 MPa. Express your answer in whole number.arrow_forwardCalculate the tensile steel stress of 5-20- mm-dia rebars in a concrete beam 260 mm by 410 mm at ultimate stage if f'c = 26 MPa and fy = 420 MPa. Express your answer in whole number.arrow_forward
- The wood has an allowable normal stress of Oallow = 15 MPa and an allowable shear stress of Tallow = 1.33 MPa. (Figure 1) Part A Determine the minimum dimension h of the beam's cross section to safely support the load. Express your answer to three significant figures and include the appropriate units. µA ? h = Value Units Submit Request Answer Figure Provide Feedback 25 kN/m B 2 m 100 mmarrow_forwardCalculate the tensile steel strain of 5-16-mm-dia rebars in a concrete beam 270 mm by 410 mm at ultimate stage if f'c = 23 MPa and fy = 420 MPa. Express your answer in 5 decimal places.arrow_forwardCalculate the tensile steel strain of 5-16-mm-dia rebars in a concrete beam 240 mm by 410 mm at ultimate stage if f'c = 20 MPa and fy=420 MPa. Express your answer in 5 decimal placesarrow_forward
- A beam has a width of 200mm and a height of 250mm and is loaded as shown. Compute the flexural stress of the fibers located at 30mm from the top at a section 5m from the left end. What is the type of stress? Present detailed drawings/FBD’s illustrating your solution.arrow_forwardDetermine the strain at yield of a Grade 60 #14 rebar (ASTM A 615). How does this compare to the strain at yield of a Grade 60 #5 rebar?arrow_forwardA beam will support a combination of dead, live, and earthquake loads. The Load Duration Factor for Dead is 0.9, Live is 1.0, and Earthquake is 1.6. The Dead load causes a stress of 300 psi, the live load causes a stress of 200 psi, and the earthquake causes a stress of 100 psi. The tabulated strength of the wood is 1000 psi. What is the critical (largest) Demand/Capacity ratio for the beam? (Demand/Capacity is fb/Fb'.)arrow_forward
- Calculate the modulus of elasticity of the wood specimen with the stress-strain relationshipshown in figure below.arrow_forwardA static third-point bending test was performed on a 100mm x 100mm x 5000mm wood sample according to ASTM D143 procedure. (span between supports = 4800mm). If the maximum load was 2,900N, calculate the modulus of rupture of the wood.arrow_forwardDraw a graph to show the typical stress–strain curve for wood. On the graph,show the modulus of elasticity. State three different factors that affect thisrelationship.arrow_forward
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