Department of Civil Engineering, N-W.F.P UET Peshawar
Hall Design (Option 2)
Refer to ACI 8.3.3 or page 396, Nilson 13th Ed. Following ACI moment coefficients apply:
1/16
1/11 1/12 1/12
0 ln = 9.5'
1/12 ln = 9'
21.06 in-k/ft
13 in-k/ft
19.31 in-k/ft 17.33 in-k/ft
17.33 in-k/ft
Figure 5: ACI moment coefficients for slab, ACI 8.3.3. (1) AT INTERIOR SUPPORT (left of support): Negative moment (-MLint) = Coefficient × (wuln2) = (1/12) × {0.214 × (9.5)2} = 1.609 ft-k/ft = 19.31 in-k/ft (2) AT INTERIOR SUPPORT (right of support): Negative moment (-MRint) = Coefficient × (wuln2) = (1/12) × {0.214 × (9)2} = 1.44 ft-k/ft = 17.33 in-k/ft (3) AT EXTERIOR MID SPAN: Positive moment (+MMext) = Coefficient × (wuln2) = (1/11) × {0.214 × (9.5)2} = 1.755 ft-k/ft = 21.06 in-k/ft (4) AT INTERIOR MID SPAN: Positive moment (+MMint) = Coefficient × (wuln2) = (1/16) × {0.214 × (9)2} = 1.08 ft-k/ft = 13.00 in-k/ft Prof Dr. Qaisar Ali (http://www.eec.edu.pk)
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