Fire Department Incident Safety Officer Practice Test

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Prepare for the Fire Department Incident Safety Officer Test. Study with flashcards and multiple choice questions that include hints and explanations. Ace your exam!

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What function does a purlin serve in construction?

To support floor joists
To form an open-web structural element
To help support roof decking
To act as a heavy timber beam

The correct answer is: To help support roof decking

A purlin serves a critical function in construction, particularly in roof systems. It is a horizontal structural element that provides support to the roof decking, which is the surface layer of a roof. Purlins help distribute the weight of the roofing materials and any loads (like snow or maintenance personnel) to the primary structural framing of the building. Additionally, they assist in maintaining the integrity and shape of the roof by providing lateral support. This support contributes to the overall stability and structural performance of the building, particularly in regions where roofs are subjected to significant loads. Purlins are essential in ensuring that the roof remains functional and safe over its lifespan.