Steel Design (Activate Learning with these NEW titles from Engineering!)
6th Edition
ISBN: 9781337094740
Author: Segui, William T.
Publisher: Cengage Learning
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Question
Chapter 2, Problem 2.5P
To determine
(a)
The maximum factored load and the controlling AISC load combination by using the load and resistance factor design.
To determine
(b)
The maximum load and the controlling AISC load combination by using allowed strength design (ASD).
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Students have asked these similar questions
A flat roof is subject to the following uniformly distributed loads: a dead load of 21 psf (pounds per square foot of roof surface), a roof live load of 12 psf, a snow load of 13.5 psf, and a wind load of 22 psf upward. (Although the wind itself is in a horizontal direction, the force that it exerts on this roof is upward. It will be upward regardless of wind direction. The dead, live, and snow loads are gravity loads and act downward.). If load and resistance factor design is used, compute the factored load (required strength) in pounds per square foot. Which AISC load combination controls?
There are 5 load combinations below:
Combination 1: 1.4DCombination 2: 1.2D+1.6L+0.5(Lr or S or R)Combination 3: 1.2D+1.6(Lr or S or R) +(0.5L or 0.5W)Combination 4: 1.2D+1.0W+0.5(Lr or S or R)Combination 5: 0.9D+1.0W
How to deal with the wind load? If the wind load W=-22 psf, then the result of combination 5 will be -3.1 psf, which is negative. And the tensile strength of materials and…
A flat roof is subject to the following uniformly distributed loads: a dead load of 29 psf (pounds per
square foot of roof surface), a roof live load of 12 psf, a snow load of 13.5 psf, and a wind load of
22 psf upward. (Although the wind itself is in a horizontal direction, the force that it exerts on this
roof is upward. It will be upward regardless of wind direction. The dead, live, and snow loads are
gravity loads and act downward.)
a. If load and resistance factor design is used, compute the factored load (required strength) in
pounds per square foot. Which AISC load combination controls?
(Express your answer to three significant figures.)
R₁
psf
-Select-
b. If allowable strength design is used, compute the required load capacity (required strength) in
pounds per square foot. Which AISC load combination controls?
(Express your answer to three significant figures.)
Ra =
psf
-Select-
Problem #2: A flat roof is subject to the following uniformly distributed loads: a dead load of 21
psf (pounds per square foot of roof surface), a roof live load of 12 psf, a snow load of 13.5 psf,
and a wind load of 22 psf upward. (Although the wind itself is in a horizontal direction, the force
that it exerts on this roof is upward. It will be upward regardless of wind direction. The dead,
live, and snow loads are gravity loads and act downward.) If load and resistance factor design is
used, compute the factored load (ZyQ) in pounds per square foot. Which ASCE 7 load
combination controls?
Chapter 2 Solutions
Steel Design (Activate Learning with these NEW titles from Engineering!)
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Similar questions
- A flat roof is subject to the following uniformly distributed loads: a dead load of 21 psf (pounds per square foot of roof surface), a roof live load of 12 psf, a snow load of 13.5 psf, and a wind load of 22 psf upward. (Although the wind itself is in a horizontal direction, the force that it exerts on this roof is upward. It will be upward regardless of wind direction. The dead, live, and snow loads are gravity loads and act downward.) a. If load and resistance factor design is used, compute the factored load (required strength) in pounds per square foot. Which AISC load combination controls? b. If allowable strength design is used, compute the required load capacity (required strength) in pounds per square foot. Which AISC load combination controls?arrow_forwardThe roof of the building is subject to a wind force 600 lb. Resolve this force into its vertical and horizontal rectangular componentes.arrow_forwardWhen a roof is subjected to downward wind load, which one of the following multiplication factors for dead loads is considered favourable in Australian Standard (load combination for ultimate limit state, considering both dead load and live load)? O 1.0 O 1.2 O 0.9 O 1.35arrow_forward
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