For years, little attention was paid to the importance of lateral forces. However, recent earthquake and hurricane disasters have demonstrated the importance of proper lateral load transfer. Engineering analysis and practical experience confirm that rim board is often an essential structural link in a home’s ability to resist the lateral loads generated by high winds.

Both iLevel® 11⁄8″ rim board and 11⁄4″ TimberStrand® LSL rim board are recognized by the major building codes.