Fastener Withdrawal Loads for Weathered and Unweathered Particleboard Decking

The effect of exterior weathering on fastener withdrawal loads of commercial southern pine phenolic-bonded particleboard decking, and urea-bonded particleboard manufactured from a similar furnish, was evaluated for three types of fasteners: screws, power-driven staples, and nails. Weathering had a greater effect on edgewise than on direct screw-pull loads. With the exception of edgewise screw pull for weathered board, screw-pull load values could be predicted by a previously published equation based on board density, fastener dimensions, and depth of penetration. Average staple-pull load was independent of resin type and test direction. Weathering caused a significant reduction in both staple-pull and lateral nail-pull loads. Average direct nail-pull load was higher in weathered board.

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