Treated to H4 with Koppers Micro? Timber Treatment Technology, Lowdeck bearers are protected from fungal decay, termites and insect attack. Suitable for in-ground use and supported by a 50-year treatment warranty. Engineered to GL8 structural grade and double sealed with a high-quality oil-based primer for added protection, LOWDECK offers an affordable, easy-to-work-with alternative to steel or aluminium bearers, and a smart upgrade from regular H3 treated pine.