Which among the following assumptions are made in the design roof trusses ?1. Roof truss is restrained by the reactions2. Axes of the members meeting at a joint intersect at a common point3. Riveted joints act as frictionless hinges4. Loads act normal to roof surfaceSelect the correct answer using the codes given below:

Which among the following assumptions are made in the design roof trus

1.	Which among the following assumptions are made in the design roof trusses ?1. Roof truss is restrained by the reactions2. Axes of the members meeting at a joint intersect at a common point3. Riveted joints act as frictionless hinges4. Loads act normal to roof surfaceSelect the correct answer using the codes given below:
A.	1, 2 and 4
B.	2, 3 and 4
C.	1, 3 and 4
D.	1, 2 and 3
Answer» C. 1, 3 and 4

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