Which of the following elements of a pitched roof industrial stee

Which of the following elements of a pitched roof industrial stee
| Which of the following elements of a pitched roof industrial steel building primarily resists lateral load parallel to the ridge?

A. bracings

B. purlins

C. truss

D. columns

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Right Answer is: A

SOLUTION

Concept:

 

Bracings: When a strong wind flows parallel to ridge, the sloping of pitched industrial roof truss deforms and instability arises parallel to ridge. To arrest this deformation and instability the top and bottom chords of the roof truss are joined by cross diagonal members which are called bracing. This bracings helps to resist the wind load parallel to ridge.

Purlins: These are horizontal beam members runs parallel to ridge and connects the trusses along the length of ridge.

Truss: These are combined arrangement of several structural members to transfer loads from top to bottom, and usually occurs at regular interval.

Columns: Columns are the vertical beam members which take load from the trusses and transfer it to the foundation.