scope:

GENERAL

Heavy timber is a type of construction in which fire resistance is attained by placing limitations of minimum sizes on wood structural members and on minimum thickness and composition of wood floors and roofs; by avoidance of concealed spaces under floors and roofs; by use of approved fastenings, construction details, and adhesives; and by providing the required degree of fire resistance in exterior and interior walls. Special effort has been made to ensure the accuracy of the information presented. It is intended that this document be used in conjunction with competent engineering design, accurate fabrication, and adequate supervision of construction. However, the American Forest & Paper Association does not assume any responsibility for errors or omissions in WCD No. 5, nor for engineering designs or plans prepared from it. The reader is encouraged to consult the current edition of the code and to consult the authority having jurisdiction.