For Problems 4.5 to 4.9, design rectangular sections for the beams, loads, and values given. Beam weights are not included in the givenloads. Show sketches of beam cross sections, including bar sizes, arrangement, and spacing. Assume concrete weighs 150 lh/t. Useh=d+2.5 in.ProblemNo.1, (psi)L(psi)Span e ()Wo not incl. bcam wt (k)W (k/)4.560,0004000242.85=0.00754.660,00040003022.0.18C,4.750,0003000283.34.860,00040003221.84.960,0003000251.815S0.005*See Appendix A, Table A.7 for p values that correspond to the e, values listed.One ans. Problem 4.5: 18 in. x 26 in. with 6 9 bars.One ans. Problem 4.7: 22 in. x 33 in. with 6 #11 bars.One ans. Problem 4.9: 16 in. x 25 in. with 5 a9 bars.

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For Problems 4.5 to 4.9, design rectangular sections for the beams, loads, and values given. Beam weights are not included in the given loads. Show sketches of beam cross sections, including har sizes, arrangement, and spacing. Assume concrete weighs 150 lht. Use h=d+25 in. Problem No. 1, (psi) L(psi) Span () Wp not incl. beam wt (k) 2. W (kn) 4.5 60,000 4000 24 2.8 50.0075 4.6 60,000 4000 30 Q.18CH 4.7 50,000 3000 28 3. 3. 4.8 60,000 4000 32 1.8 4.9 60,000 3000 25 18 1.5 S-0.005 *See Appendix A. Table A.7 for p values that corespond to the One ans. Problem 4.5: 18 in. x 26 in. with 6 9 bars. One ans. Problem 4.7: 22 in. x 33 in with 6 11 bars. One ans. Problem 4.9: 16 in. x 25 in. with S 9 bars. values listed.

For Problems 4.5 to 4.9, design rectangular sections for the beams, loads, and values given. Beam weights are not included in the given loads. Show sketches of beam cross sections, including har sizes, arrangement, and spacing. Assume concrete weighs 150 lht. Use h=d+25 in. Problem No. 1, (psi) L(psi) Span () Wp not incl. beam wt (k) 2. W (kn) 4.5 60,000 4000 24 2.8 50.0075 4.6 60,000 4000 30 Q.18CH 4.7 50,000 3000 28 3. 3. 4.8 60,000 4000 32 1.8 4.9 60,000 3000 25 18 1.5 S-0.005 *See Appendix A. Table A.7 for p values that corespond to the One ans. Problem 4.5: 18 in. x 26 in. with 6 9 bars. One ans. Problem 4.7: 22 in. x 33 in with 6 11 bars. One ans. Problem 4.9: 16 in. x 25 in. with S 9 bars. values listed.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Bars

In civil engineering, bars refer to steel reinforcement bars or rebars. These are structural members primarily used for reinforcement purposes in masonry works. A bar is characterized by its cross-sectional area, which is negligible compared to its length. Bars are usually manufactured by steel which is uniform throughout the length, or by meshing multiple steel wires. Other materials of the bar include carbon steel, glass fiber, carbon fiber, and basalt fiber. The reinforcing bars are coated with epoxy resins and other materials to enhance some of their properties including corrosion resistance.

Question

For Problems 4.5 to 4.9, design rectangular sections for the beams, loads, and values given. Beam weights are not included in the given
loads. Show sketches of beam cross sections, including bar sizes, arrangement, and spacing. Assume concrete weighs 150 lh/t. Use
h=d+2.5 in.
Problem
No.
1, (psi)
L(psi)
Span e ()
Wo not incl. bcam wt (k)
W (k/)
4.5
60,000
4000
24
2.8
5=0.0075
4.6
60,000
4000
30
2
2.
0.18C,
4.7
50,000
3000
28
3.
3
4.8
60,000
4000
32
2
1.8
4.9
60,000
3000
25
1.8
15
S0.005
*See Appendix A, Table A.7 for p values that correspond to the e, values listed.
One ans. Problem 4.5: 18 in. x 26 in. with 6 9 bars.
One ans. Problem 4.7: 22 in. x 33 in. with 6 #11 bars.
One ans. Problem 4.9: 16 in. x 25 in. with 5 a9 bars.

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