Work Group Continues Progress on Skylight Impact Standard Draft
An ASTM work group is nearing the next stage of development on a human impact standard for skylights.
ASTM WK17797 completed a draft version of “Specification of Human Impact Test Criteria, with Procedure for Testing Unit Skylights and Related Products Used on Skylight Openings on Non-Residential Roofs With a Slope of 4:12 or Less for Determining Fall-Through Resistance.”
John Westerfield of CrystaLite, who chairs the American Architectural Manufacturers Association (AAMA) Skylight Fall Protection Task Group, says “We will be soon balloting the final draft to the work group with the aim to pass the document up to the subcommittee as soon as possible.”
Westerfield says the group doesn’t expect unanimous approval from the ballot, because some members don’t think plastic glazing is a possible means of fall protection.
“Not all plastic is the same, just as not all metal is the same,” he says. “Those familiar with the different types of plastic glazing materials are comfortable with the strict durability criteria set forth and the additional redundant requirements mandated for the use of plastic glazing as part of the system.”
The work group includes representation from skylight manufacturers, glass and plastic glazing manufacturers and government representatives. The AAMA task group has spent four years generating consensus input for the standard.
The scope of WK17797 is “[t]o establish fall-through resistance criteria for skylight openings on nonresidential and low-slope roofs. The intent is to prevent a human from falling through the opening after impact.”
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