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3.59Top tieBraceFormConcrete9 ftBottomtiePROBLEM 3.60

Question

Assume wet concrete (gamma=150lbf/ft3) behaves as a liquid. Determine the force per unit foot of length exerted on the forms. If the forms are held in place as shown, with ties between vertical braces spaced every 2ft, what is the force exerted on the bottom tie?

3.59
Top tie
Brace
Form
Concrete
9 ft
Bottom
tie
PROBLEM 3.60
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3.59 Top tie Brace Form Concrete 9 ft Bottom tie PROBLEM 3.60

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Step 1

Given information:

Given that

Top tie
9ft
Bottom
tie
Height of the forms, h=9 ft
And, 150/b/ ft
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Top tie 9ft Bottom tie Height of the forms, h=9 ft And, 150/b/ ft

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Step 2

Calculation:

A. Calculation of the force per unit foot of length exerted on the forms as follows

That is, resultant force acting on the forms by using the formula

F
= P.A
= e.b.h.y
F 150x1ftx 9ftxy....)
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F = P.A = e.b.h.y F 150x1ftx 9ftxy....)

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Step 3

Here, we need to calculate the distance from the free s...

2
y
2
y=4.5
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2 y 2 y=4.5

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