The NFPA 13 sprinkler installation rules for exterior projections appear simple but have long been a source of confusion. This lesson will review the cases where sprinklers are required under exterior projections and those where they are permitted to be omitted. Topics will include: Recognizing what building features should be treated as exterior projections and which should not; Determining the combustibility classification of exterior projections; Determining the use of the space underneath exterior projections.
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