Visually graded at source to meet all aspects of BS5534:2003 with the exception of a final grade for knots, which must be carried out on site. Individual pieces are marked for full identification showing size, species. Manufactured from European Redwood (PNSY) or European Whitewood (WPCA). High pressure preservative treated to BS:8417:2003 (UC2) carries a 60 year service life against insect attack and wood rotting fungi.
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