The Rimboard is used as a perimeter board.
Treated to the level of H3.1 to provide a protective envelope to the floor
Rimboard (RB21) ties the end of the I-Beams joists together, providing
lateral stability to the floor platform. Rimboard is also used as a stiffener
for I-Beams in cantilevered situations.
Rimboard (RB45) is used in situations where structural fixing is