Question 1

The economic spacing of roof truss depends on
A)cost of purlins only
B)cost of purlins and cost of roof covering
C)dead loads
D)cost of roof covering and dead loads

Accepted Answer

The economic spacing of roof truss depends on both the cost of purlins and the cost of roof covering, as these factors influence the overall cost efficiency and structural integrity of the roof.

Question 2

Which of the following is true for economic spacing?
A)cost of trusses should be equal to twice the cost of purlins
B)cost of trusses should be equal to twice the cost of purlins minus cost of roof coverings
C)cost of trusses should be equal to the cost of purlins plus cost of roof coverings
D)cost of trusses should be equal to twice the cost of purlins plus cost of roof coverings

Accepted Answer

Economic spacing is achieved when the cost of trusses equals twice the cost of purlins plus the cost of roof coverings, optimizing the overall cost of the structure.

Question 3

Which of the following load combination is not considered for design of roof trusses?
A)dead load + crane load
B)dead load + wind load
C)dead load + earthquake load
D)dead load + live load + wind load

Accepted Answer

Earthquake load is not considered for the design of roof trusses.

Question 4

Live load for roof truss should not be less than A)0.4kn/m² B)0.2kn/m² C)0.75kn/m² D)0.8kn/m²

Accepted Answer

The minimum live load for roof trusses is typically specified as 0.4 kN/m² to account for maintenance activities and potential temporary loads such as workers or equipment.

Question 5

Simple connections are used to transmit
A)forces
B)moments
C)stresses
D)both force and moment

Accepted Answer

Simple connections are designed to transmit forces between structural elements, but they are not intended to transfer moments.

Quiz 4: Structural Design and Analysis

The economic spacing of roof truss depends on

Which of the following is true for economic spacing?

Which of the following load combination is not considered for design of roof trusses?

Live load for roof truss should not be less than

Simple connections are used to transmit