The Fenestration and Glazing Industry Alliance updated a specification establishing the requirements for materials, testing and performance for sash balances used in hung type windows conforming to AAMA/WDMA/CSA 101/I.S.2/A440, North American Fenestration Standard. AAMA 902-24, Specification for Sash Balances, is now available for purchase in the FGIA online store. This document was last updated in 2016.
In this new edition, the Sash Balance Review Task Group added performance levels C and D to a table laying out cycle life requirements. The group also created a decision tree for product line testing guidance and added a nomenclature tree in Section 11.5 for the eventual verified components list of sash balances.
“Sash balances are hardware components used to counterbalance the mass of a sash in hung type vertical sliding windows,” says FGIA Fenestration Standards Specialist Glenn Ferris. “The purpose of this document is to establish a universal method for characterization of the performance of sash balances as well as defining the method, or methods, by which these characteristics are to be tested.”
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