Seismic Support For Pendant Light Fixtures

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Technical Document Seismic Technical Guide

    http://www.usg.com/content/dam/USG_Marketing_Communications/united_states/product_promotional_materials/finished_assets/seismic-technical-guide-light-fixture-hanger-wire-requirements-en-SC2493.pdf
    Guidelines for Seismic Restraint for Direct-Hung Suspended Ceiling Assemblies–Seismic Zones 3-4, defines the requirements for supplementary hanger wires and slack wires to support lay-in light fixtures in suspended acoustical ceilings. There are two factors that determine these hanger wire requirements in seismic design categories D E, and F:

Hanging Requirements for Lighting Fixtures in Earthquake ...

    https://homeguides.sfgate.com/hanging-requirements-lighting-fixtures-earthquake-areas-63076.html
    Pendant Lighting Fixtures. To prevent pendant light fixtures, chandeliers, ceiling fans and other fixtures you suspend from the ceiling from getting damaged or falling during an earthquake, FEMA ...

TYPICAL CAUSES OF DAMAGE - FEMA.gov

    https://www.fema.gov/sites/default/files/orig/plan/prevent/earthquake/fema74/pdf/chapter6_4_9/chapter6_4_9_3.pdf
    FEMA E-74 6: Seismic Protection of Nonstructural Components Page 6-400. Damage Examples . Figure 6.4.9.3-1 Failure of a strip of pendant light fixtures at Dawson Elementary School library as a result of the 1983 magnitude-6.4 Coalinga Earthquake. Note that in this case the support stems failed at the ceiling connection and the stem came down

Lighting Seismic Bracing Cable Suspension Griplock ...

    https://www.griplocksystems.com/product-category/lighting/seismic-bracing
    During a seismic event, forces can quickly build up that may cause a lighting fixture to tear loose from its ceiling mountings. Though the Griplock® Lighting Seismic Bracing System won’t prevent movement during a seismic event altogether, it is designed to limit such movement, saving lives and minimizing property damage.

6.4 MECHANICAL, ELECTRICAL, AND PLUMBING …

    https://www.fema.gov/sites/default/files/orig/plan/prevent/earthquake/fema74/pdf/chapter6_4_9/chapter6_4_9_1.pdf
    FEMA E-74 6: Seismic Protection of Nonstructural Components Page 6-382 6.4 MECHANICAL, ELECTRICAL, AND PLUMBING COMPONENTS 6.4.9 LIGHT FIXTURES 6.4.9.1 RECESSED LIGHT FIXTURES This category covers recessed light fixtures that are part of a suspended ceiling grid. ... cross furring should be used to support light fixtures. The fixture should be ...

Alternate App Guide - IBC Category D, E, F

    https://www.usg.com/content/usgcom/en/products/performance-applications/seismic/alternate-ibc-category-d-e-f.html
    Light fixture (all types) mechanically attached to grid NEC 410-16 (two per fixture unless independently supported) Required - Surface-mounted fixtures attached to grid Not required - Pendant-hung fixtures directly supported from structure with 9-gauge wire (or approved alternative) Required - Rigid lay-in or can light fixtures



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