Decks

Timber

Log

Log decks are usually cut onsite from small-diameter material and are installed without preservative treatment. The resulting surface is very rough and has an expected life of just 2 to 12 years.

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Sawn Plank

Sawn timber plank decking can be transverse (perpendicular to the load-carrying members) or longitudinal (parallel to the load-carrying members). Planks should be pressure treated with a wood preservative. Untreated planks have an expected life of only 2 to 10 years. Planks should be treated with a waterborne preservative if skin contact is expected.

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Glulam

More heavily loaded bridges in rural and urban Recreation Opportunity Spectrum classes may use glued-laminated (glulam) timber decking.

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