Ceiling collapse prevention fail-safe net

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FS840, FS1440 Fail-Safe Net

last updated：May 24, 2020

協立工業

Official site

Fail-safe net specifically designed for preventing ceiling collapse and falling for specific ceilings.

This is a dedicated net for preventing the fall or drop of ceilings specifically designed for certain ceilings, made from flame-retardant high-strength fiber materials. The design fully complies with the technical standards outlined in the Ministry of Land, Infrastructure, Transport and Tourism's explanatory document regarding ceiling drop prevention measures. During the Great East Japan Earthquake, many ceilings fell, causing significant damage. Additionally, ceilings in swimming pools have frequently fallen, resulting in harm. In August 2013, the Ministry of Land, Infrastructure, Transport and Tourism announced Notification No. 771 concerning specific ceilings (suspended ceilings with a height of 6 meters or more, a horizontal projection area of 200 square meters or more, and a unit area mass of 2 kg/square meter or more), which will be enforced from April 2014. As a result, safe structural methods for ceilings that are structurally sound will be required for specific ceilings. Similar requirements will also be imposed on existing buildings' specific ceilings during renovations or expansions. This ceiling drop prevention fail-safe net is recognized as a safe structural method for specific ceilings in existing buildings.

Related Link - https://kyoritsukogyo.co.jp/construction/failsafen…

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basic information

This is a fail-safe net made using flame-retardant high-strength fiber materials designed in full compliance with the technical standards outlined in the Ministry of Land, Infrastructure, Transport and Tourism's guidelines for ceiling detachment measures. In cases where the net shape is complex, the membrane structure and cable net analysis program GENATES (FEM analysis) is used to accurately evaluate the stresses that occur in the net. The flame-retardant high-strength fiber used in the fail-safe net has more than four times the strength of general polyethylene. Additionally, unlike polyethylene-based high-strength fibers, the net material itself is flame-retardant and does not burn in the atmosphere, with a melting temperature of 400°C compared to 150°C for polyethylene. Two types are available: FS840 (Φ1.31mm, 40mm mesh) and FS1440 (Φ1.94mm, 40mm mesh). The maximum dimensions for a single net, without any overlapping joints, can reach W3.8m and L100m. The limiting oxygen index (LOI), which evaluates flame retardancy, is 28, meaning it does not burn in the atmosphere (the volume fraction of oxygen in the atmosphere is 16%, so an LOI of 16 or below would burn in the atmosphere). This is not a flame-retardant product based on surface treatment; the net material itself is flame-retardant (it meets the performance testing standards for flame-retardant products).