EBK FUNDAMENTALS OF CONSTRUCTION ESTIMA
4th Edition
ISBN: 8220106748305
Author: Pratt
Publisher: CENGAGE L
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Textbook Question
Chapter 5, Problem 1RQ
Why is it recommended that the estimator begin a takeoff of concrete work by measuring the quantity of concrete in an item rather than the amount of formwork?
Expert Solution & Answer
To determine
The reason recommended for the estimator to begin a takeoff of concrete work by measuring the quantity of concrete in an item rather than the formwork amount.
Explanation of Solution
Taking off concrete work must start with the estimator measuring the concrete as the actual concrete descriptions are usually given on the drawings, whereas the details of the formwork are not given. The estimator can then review the needs for the formwork by measuring and estimating the volume of concrete needed followed by the requirements of finishing.
Since only the area of forms in contact with the concrete is measured, at the time of the takeoff, the estimator does not have to review the descriptions of the forms design.
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SITUATION 3: A simply-supported steel beam 6 m long carries a uniform load of 25 kN/m and an axial
compressive force of 250 kN. Assume both flange and web are compact. The properties of the rolled section are
as follows: Show your complete solution and box only the final answer.
Flange Width, bf = 210 mm
Flange thickness, tf = 24 mm
Overall depth, d=225 mm
Web thickness, tw 14 mm
Yield Strength, Fy=248 Mpa
Radius of Gyration, ry = 54.342 mm
Cb = 1.136
J = 2,097,256 mm²
rts = 62.089 mm
1. Determine the total moment of inertia along x-axis.
2. Determine the total moment of inertia along y-axis
3. What is the allowable axial compressive strength of the beam, in kN?
4. What is the allowable flexural strength of the beam, in kN-m?
1. 108.764 x 106 mm*
2. 37.084 x 106 mm*
3. 982.304 KN
4. 166.723 KN-m
Chapter 5 Solutions
EBK FUNDAMENTALS OF CONSTRUCTION ESTIMA
Ch. 5 - Why is it recommended that the estimator begin a...Ch. 5 - Why is it also preferable to measure the concrete...Ch. 5 - Why is nothing added to the concrete quantities...Ch. 5 - What size does an opening in concrete have to be...Ch. 5 - Why is concrete classified and measured separately...Ch. 5 - Prob. 6RQ
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