How come there is no load at points A and E? 2-3· The floor system used in a sch

Question

How come there is no load at points A and E?

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 jt F and side girder ARCDE Set -10 ft. b-30 fL llint: See Tables 1-2 and 1-4. 6 30f Joist BF. Sie0 Thus the tributary area for this joist is the rectangular area shown in Fig a and the intensity of the uniform distributed load is 3, the concrete sNab will behave as a one way slah 4 in thick reinforced stone concrete slab: (0.15 k.aNft cio ft)-as k/h Live load for classrooms(004 k/n2)( 10 ft)- Due to symmetry, the vertical reactions at B and Fare 8, _ Fy- (09 k/ft)(301)2-13.5 k The loading diagram for joist BFis shown in Fig. b Girder ABCDE· The loads that act on this girder are the vertical reactions of the joists at B, C and D, which are BC,-D,-15.5 k.The loading diagram for this girder is shown in Hg e 09k b-3oft

Explanation / Answer

Solution - There has to be load at point A and E from the joists A and E since their loads are transferred to the girder.

The tributary width = 5ft and reactions to be calculated which need to be transferred to the girder ends.

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