SUSTAINABLE ENERGY (LL)
2nd Edition
ISBN: 9780357667224
Author: DUNLAP
Publisher: CENGAGE L
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Chapter 12, Problem 8P
To determine
Find the length of the device required to generate electricity of
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Compute the nominal shear strength of an M12 × 11.8 of A572 Grade 60 steel (Fy = 60 ksi).
For M12 x 11.8: d = 12 in., tw = 0.177 in., h/tw = 62.5.
Vn
=
kips
A flexural member is fabricated from two flange plates 1/2 × 71/2 and a web plate 3/8 × 19. The
yield stress of the steel is 50 ksi.
a. Compute the plastic section modulus Z and the plastic moment Mp with respect to the major
principal axis.
(Express your answers to three significant figures.)
Z =
Mp =
in.
3
ft-kips
b. Compute the elastic section modulus S and the yield moment My with respect to the major
principal axis.
(Express your answers to three significant figures.)
S =
My
=
in.3
ft-kips
=
65 ksi.
A W16×36 of A992 steel has two holes in each flange for 7/8-inch-diameter bolts.
For A992 steel: Fy = 50 ksi, Fu
For a W16×36: bƒ = 6.99 in., tƒ
=
0.430 in., Z = 64.0 in.³ and Sx = 56.5 in.³
a. Assuming continuous lateral support, verify that the holes must be accounted for and determine
the nominal flexural strength.
(Express your answer to three significant figures.)
Mn
=
ft-kips
b. What is the percent reduction in strength?
(Express your answer to three significant figures.)
Reduction =
%
Chapter 12 Solutions
SUSTAINABLE ENERGY (LL)
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