What is the minimum thickness ‘h’ of nonprestressed one-way slabs of length ‘L’ for simply supported ?
- AL/24
- BL/10
- CL/20Correct
- DL/28
Solution
Concept
ACI minimum thickness of one-way slabs
Formula
hmin = L/20 (simply supported)
Step-by-step solution
1. ACI Table: simply supported = L/20; one end continuous = L/24; both ends continuous = L/28; cantilever = L/10.
Explanation
The minimum thickness avoids the need to calculate deflections.
Why the other options are wrong
L/24 and L/28 are for continuous slabs and L/10 is for cantilevers.
Shortcut
SS L/20, one end continuous L/24, both L/28, cantilever L/10.
Common mistake
Choosing L/24.
Correct answer: C) L/20