The same 15/32 OSB with a 32/16 rating is sufficient for decking the roof trusses if the trusses are spaced at or less than how many inches on center?

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Prepare for the Glencoe Carpentry Exam. Practice with flashcards and multiple-choice questions, each offering hints and explanations. Equip yourself for success on your test day!

Multiple Choice

The same 15/32 OSB with a 32/16 rating is sufficient for decking the roof trusses if the trusses are spaced at or less than how many inches on center?

Explanation:
OSB decking strength depends on both thickness and a rating that tells you how far apart the roof supports can be. A 15/32 OSB with a 32/16 rating is specified for roof decking when the trusses are spaced no more than 32 inches on center. That spacing keeps the panel stiff enough and allows the fasteners to grip under typical loads. If the spacing goes beyond 32 inches, the panel can deflect too much between supports, risking sagging or failure and often requiring thicker decking or closer truss spacing. So the decking is considered suitable up to 32 inches on center.

OSB decking strength depends on both thickness and a rating that tells you how far apart the roof supports can be. A 15/32 OSB with a 32/16 rating is specified for roof decking when the trusses are spaced no more than 32 inches on center. That spacing keeps the panel stiff enough and allows the fasteners to grip under typical loads. If the spacing goes beyond 32 inches, the panel can deflect too much between supports, risking sagging or failure and often requiring thicker decking or closer truss spacing. So the decking is considered suitable up to 32 inches on center.

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