本指南规范阐述了商用、层压芯材、钢门和 合适的框架产品，并反映了钢制门和框架结构的选择越来越多 来自成员制造商。

This guide specification addresses the requirements for commercial, laminated core, steel doors, and appropriate frame products, and reflects the growing choices of steel door and frame constructions available from member manufacturers.