Garage/Rolling Door U-factor Task Group Discusses Vertical Jamb Hardware

The Garage/Rolling Door U-factor Task Group convened this morning and discussed a DASMA research project that involved the evaluation of rolling steel door vertical jamb hardware.

This Task Group evaluates all known existing testing and simulation methods including available data or conclusions from use of such methods, to determine practicality of simulation, and to draft recommended provisions – including multiple testing and/or simulation methods if feasible – for review by the NFRC U-Factor Subcommittee.

Chair, Joe Hetzel, explained that the DASMA project considered whether vertical jamb hardware needed to be mounted in order to achieve accurate test results on rolling steel doors. It also sought to determine whether they play enough of a role to influence results.

Hetzel said test results improved slightly when the hardware is removed and added that it is appropriate to suggest removing the hardware for simulation in NFRC ratings.