The use of boron rods as a boron source for dual treated timber
| Authors: | Mark E. Mankowski, Grant Kirker, Stan Lebow, James Renfroe, Jeffrey J. Morrell |
| Year: | 2019 |
| Type: | Paper |
| Station: | Forest Products Laboratory |
| Source: | In: Proceedings, One Hundred Fifteenth Annual Meeting of the American Wood Protection Association. Volume 115. Birmingham Alabama: American Wood Protection Association: 44-50. |
Abstract
Fused borate rods were installed at equal distances along the length of unseasoned red or white oak bridge timbers. Moisture content and boron levels were examined at 15 and 30 weeks after rod installation at various points along the bridge timbers. Moisture contents for both red and white oak were greater than 60% at all time checks. Boron levels were highest near the point of borate rod placement, but high levels were also recorded 4 and 6 inches from the rod installation point. Boron levels transverse to the boron rod installation point were lower than in the longitudinal direction. Acceptable boron levels were recorded at points up to 6 inches away from the boron installation point after 30 weeks. Boron levels in the transverse direction remained lower than acceptable levels for dual treatment.