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MindTap Electrical for Fletcher's Residential Construction Academy: House Wiring, 5th Edition [Instant Access], 4 terms (24 months)
5th Edition
ISBN: 9781337553070
Author: FLETCHER
Publisher: Cengage Learning US
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Chapter 12, Problem 3RQ
To determine
The article of the NEC covering Type EMT
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(20
02 A concrete beam of rectangular cross-section (300 x 400) mm is Prestressed with
wires located at (30) mm from the top of the beam .The wires are initially tensioned to
0-6 mm) diameter wires at (100) mm from the soffit of the beam and (5-6 mm)
a stress of (900 N/mm²). Compute the percentage loss of stress in steel after transfer due
to elastic deformation of concrete.
Given: Es=200 x 103 N/mm², Ec = 25 x 10³ N/mm².
300
за
60000
400
100
546
2046
Reinforced Concrete Design
First Monthly Exam
24/02/2
Q1. A simply supported rectangular beam (300 x 400) mm and span (12) m with live load of
from the soffit of the beam. Compute the stresses at mid-span of beam for the following
(5 kN/m). At the centre of the beam the prestressing force of (120) kN is located at (50 mm)
conditions:
(a) Prestress + self- weight of beam (initial stage).
(b) Prestress + self- weight of beam + Live Load (service stage).
3:00
400
120
K
*
12m
5kN/m.
120 KN
A driven pipe pile in clay is shown in Figure (1). The pipe has outside diameter of 406 mm, and
wall thickness is 6.35 mm.
a. calculate the net point bearing capacity.
b. calculate the skin resistance (1) by using a method, (2) by using A method.
e. Estimate the net allowable pile capacity. Use FS-4.
Figure (1)
5 m
Saturated clay
30 kN/m²
Groundwater
table
y= 18 kN/m
5 m
Clay
C-30 kN/m2
y= 18 kN/m
20 m
C
Clay
-100 kN/m²
19.6 kN/m
Chapter 12 Solutions
MindTap Electrical for Fletcher's Residential Construction Academy: House Wiring, 5th Edition [Instant Access], 4 terms (24 months)
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