Nail-head pull-through strength and lateral nail resistance strength of wood-based boards subjected to various climatic conditions in Japan

Abstract

Particleboard (PB), oriented strand board (OSB), and medium-density fiberboard (MDF) were subjected to various climatic conditions at four sites (Morioka, Tsukuba, Okayama, and Miyakonojo; sites 1, 2, 3, and 4, respectively) in Japan. The reduction in the nail-head pull-through strength and lateral nail resistance strength (both strengths combined are hereafter referred to as nailed board strength) of PB and OSB at sites 3 and 4, which are high-temperature sites, was larger than that at the other sites. Temperature played a significant role in decreasing the nailed board strength. However, the nailed board strength of MDF did not significantly decrease for any site. Biodeterioration, rather than the extraction of wood components and the removal of materials on the board surface, was the main cause of mass loss. In particular, OSB exhibited noticeable biodeterioration. In contrast, there was hardly any biodeterioration in MDF. The correlation between density and nailed board strength was observed to be strong after the outdoor exposure test of PB and OSB.