A rugged construction consisting of hardwood veneers permanently bonded to crossbands frame and core. The modulus of rupture and elasticity of the premium core is much higher than competitive products providing less breakage during manufacturing. The weight of this premium core is lighter than competitive products allowing for more units per shipment.
Premium Grade conforming to or exceeding WDMA Industry Standard I.S. 1-A and Architectural Woodwork Institute Standards for type FD 5 as tested per A.S.T.M. E-152 "Fire Test of Door Assemblies" performed by Warnock Hersey International.