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Problems: all but 2A & 2B from Ambrose & Tripeny, Chapter 2 & 1, pgs 59, 65, 32, and 36.
Note: Problems marked with a * have been altered with respect to the problem stated in the text.
Problem 2.1.A. What axial compression load may be placed on a short timber post whose cross-
sectional dimensions are 9.5 x 9.5 in. if the allowable unit-compressive stress is 1100 psi?
(normal stress)
Partial answers to check with: P = 99.3 kips
2A) What should be the diameter of the bolt shown in Figure 2.1d
if the shearing force is 9000 lb and the allowable unit shearing
stress is 15 ksi? (shear stress)
Partial answers to check with: d = 0.874 in.
Problem 2.1.C. Determine the minimum cross-sectional area of a
steel bar required to support a tensile force of 50 kips if the allowable unit tensile stress is 20
ksi. (normal stress)
Problem 2.2.D.* USE METRIC UNITS. A 12.7 mm diameter round steel rod 12.19 m long
supports a load of 17.79 kN. How much will it elongate? (kN/mm2 = 106 kPa) )
Partial answers to check with:
= 8.56 mm
Partial answers to check with:
restrained = 0.0895 in, f = 6,220 psi
Problem 1.6.A.* USE METRIC UNITS. Figure 1.18
represents a beam in equilibrium with three loads and
two reactions. Select five different Using the centers
of moments at each load (not the end reactions), and
write the equation of moments for each, showing that
the sum of the clockwise moments equals the sum of
the counterclockwise moments. (moment of a force)
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2B) Use US customary units. Ealuminum = 10,000 ksi
(4%)
(6%)
(4%)
(6%)
(20%)
(20%)
(axial strain and elasticity)
(thermal stresses)
Figure 1.18 Reference for Problem 1.6
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