PSAD SITUATION 148: Design and Analysis of One-Way Slab | CELE November 2024

CELE Past Board Exam Problem

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SITUATION: A 125 mm thick slab has the following specifications:
fc’ = 27.5 MPa
Clear cover = 20 mm
fy = 275 MPa for 12 mm and 10 mm bars
fy = 413 MPa for 16 mm bars
Use strength reduction factor for flexure = 0.90
1. Determine the ultimate flexural strength (kN-m) of the slab if it is reinforced with 10 mm bars spaced at 125 mm center to center.
A. 16.64 C. 15.20
B. 23.50 D. 14.97

2. Determine the ultimate flexural strength (kN-m) of the slab if it is reinforced with 16 mm bars spaced at 200 mm center to center.
A. 25.2 C. 32.9
B. 27.5 D. 36.5

3. If 10 mm bars are replaced with 12 mm diameter bars, what is the spacing of the 12 mm diameter bars?
A. 150 C. 170
B. 160 D. 180

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