ANSI/BHMA A156.21-2019

04-15-2020 comment

Standard Number:ANSI/BHMA A156.21-2019
Standard For Thresholds
1. 1 ANSI/BHMA A156.21-2019 establishes requirements for thresholds. Types are described with identifying numbers. Strength tests, fastening systems, and gasketing tests are included.
1. 2 Tests described or referenced in this Standard are performed under laboratory conditions. In
actual use, results vary because of installation, maintenance, and environmental conditions.
2.1 Threshold .A horizontal member installed beneath a closed door or in a wall opening.
2.1.1 Compressing Top Threshold .A threshold with a compressible seal which seals against
the bottom of the door.
2. 1. 2 Flat Saddle. A threshold with a flat top that is smooth or fluted.

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