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Content Description Per NFPA's requirements, when purchasing NFPA 2021 Standards and/or 2020 NFPA 70 (NEC), you must subscribe to at least one more NFPA Standard to complete your purchase. In order to fulfill this requirement, we automatically add 2019 NFPA 900 to your cart. This title may be removed during checkout if you choose to add a different NFPA standard to your cart, and pricing will be recalculated accordingly.
Help confirm window and glass block assemblies adequately prevent or slow the spread of fire by following the latest NFPA 257 criteria.
It is vital that openings in fire-rated walls such as windows, glass blocks, and other light-transmitting assemblies are capable of performing as intended to provide an adequate level of protection. NFPA 257, Standard on Fire Test for Window and Glass Block Assemblies, offers complete criteria for conducting fire and hose stream tests to help ensure these types of assemblies won’t contribute to fire spread.
A must-have for manufacturers and testing laboratories, NFPA 257 intends to improve fire protection and building and life safety by providing standardized protocols for calculating the effectiveness of fire windows and glass block assemblies. The document also establishes procedures for comparing the performances of various types of fire window openings.
NFPA 257 covers the following subjects:
Control of fire test temperature-time curve, furnace temperatures, and furnace pressure
Fire window assembly construction and size, mounting, and test wall
Conducting of fire tests and hose stream tests
Performance criteria for fire tests and hose stream tests
Reporting requirements and supportive annex material
NFPA 257, 2022 edition, is the most complete and up-to-date source for window and glass block assemblies fire testing.
NFPA 257, Standard on Fire Test for Window and Glass Block Assemblies, applies in NFPA 101®, Life Safety Code®, when a fire-resistive wall has a window opening added to it. The standard is also cited in NFPA 80, Standard for Fire Doors and Other Opening Protectives. References have been updated in this edition based on the most current industry knowledge.
Help to ensure fire windows are properly tested to better safeguard lives and property.
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About NFPAThe mission of the international nonprofit NFPA, established in 1896, is to reduce the worldwide burden of fire and other hazards on the quality of life by providing and advocating consensus codes and standards, research, training, and education.
The world's leading advocate of fire prevention and an authoritative source on public safety, NFPA develops, publishes, and disseminates more than 300 consensus codes and standards intended to minimize the possibility and effects of fire and other risks.
NFPA membership totals more than 70,000 individuals around the world
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