Searching for Seismic Support For Pendant Light Fixtures information? Find all needed info by using official links provided below.
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:
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 ...
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
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.
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 ...
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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