包括250多个石膏保护墙天花板、柱、梁、梁和桁架系统的耐火等级，包括许多以前版本中没有的系统。参考所有三个模型建筑规范。得到大多数城市和州的批准

Includes fire resistance rating for over 250 gypsum-protected wallc ceiling, column, beam, girder, and truss systems, including many systems not in the previous editions. Referenced by all three model buiding codes. Approved by most cities and state codes