For this question, I was wondering where the 0.15 came from in the dead load equation because when I looked at table 1.2, I saw it was 144. Also, for the Dead load equation, I thought it was DL=q*A*thickness so I was wondering why aren’t they doing 30*10 for the area

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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For this question, I was wondering where the 0.15 came from in the dead load equation because when I looked at table 1.2, I saw it was 144. Also, for the Dead load equation, I thought it was DL=q*A*thickness so I was wondering why aren’t they doing 30*10 for the area
2-3. The floor system used in a school classroom consists of a
4-in. reinforced stone concrete slab. Sketch the loading that
acts along the joist BF and side girder ABCDE. Set
a = 10 ft, b = 30 ft. Hint: See Tables 1.2 and 1.4.
SOLUTION
Joist BF. Since
a
Thus, the tributary area for this joist is the rectangular area shown in Fig. a, and the
intensity of the uniform distributed load is
b
30 ft
= 3, the concrete slab will behave as a one-way slab.
10 ft
4
4-in-thick reinforced stone concrete slab: (0.15 k/ft³) (ft)(1
ft (10 ft) = 0.5 k/ft
12
Transcribed Image Text:2-3. The floor system used in a school classroom consists of a 4-in. reinforced stone concrete slab. Sketch the loading that acts along the joist BF and side girder ABCDE. Set a = 10 ft, b = 30 ft. Hint: See Tables 1.2 and 1.4. SOLUTION Joist BF. Since a Thus, the tributary area for this joist is the rectangular area shown in Fig. a, and the intensity of the uniform distributed load is b 30 ft = 3, the concrete slab will behave as a one-way slab. 10 ft 4 4-in-thick reinforced stone concrete slab: (0.15 k/ft³) (ft)(1 ft (10 ft) = 0.5 k/ft 12
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