Residential Construction Academy: House Wiring (MindTap Course List)
5th Edition
ISBN: 9781337402415
Author: Gregory W Fletcher
Publisher: Cengage Learning
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Question
Chapter 6, Problem 6RQ
To determine
The minimum number of small-appliance branch that must be installed in each dwelling unit and the section in which this information is found.
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Point loads of magnitude 100, 200, and 380 kN act at B, C, and D, respectively (in the figure below). Determine the increase in vertical stress at a depth of 6 m below point A. Use Boussinesq's equation.
B
6 m
A
6 m
с
3 m
D
(Enter your answer to three significant figures.)
Δαχτ
kN/m²
Two line loads q₁ = 30 kN/m and 92 = 44 kN/m of infinite lengths are acting on top of an elastic medium, as shown in the figure below.
Find the vertical stress increase at A.
92
91
6 m
3 m
3 m
Δσ
A
(Enter your answer to three significant figures.)
Vertical stress increase at A =
kN/m²
A flexible circular area is subjected to a uniformly distributed load of 144 kN/m² (see the figure below). The diameter of the load area is 2 m. Estimate the average stress increase (Aσay) below the center of the
loaded area between depths of 3 m and 6 m. Use the equations:
1
Ασ
= go 1
[1 + (2) ² ³/2
and
Aσ av (H2/H1)
Δσι + 41ση + Ασο
6
9
B/2
krark
do
Δε
Aσ
(Enter your answer to three significant figures.)
Ασαν
=
kN/m²
Chapter 6 Solutions
Residential Construction Academy: House Wiring (MindTap Course List)
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