Seismic Ceiling Grid

To support individual panels around the perimeter fema determined that the key to good seismic.

Seismic ceiling grid.

Provide a systematic and quantifiable approach to grid ceiling bracing. Wires are arrayed 90 from each other and at an angle not exceeding 45 from the plane of the ceiling. Determination of the seismic design category is complex and must be determined by a registered architect or professional engineer and should be found in the construction docu mentation. All usg donn brand ceiling suspension systems meet these requirements.

Because codes continue to evolve check with a local official prior to designing and installing a ceiling system. Research and tests demonstrated that industry seismic standards ubc standard 25 2 were not adequate. In the event of an earthquake our seismic rated ceiling systems help support life safety and the preservation of property. Prevent loss of amenity caused by behavior of grid ceiling systems during seismic activity.

In each case the seismic braces should be designed to enable the suspended ceiling to carry the seismic demand load. Seismic design category the requirements for a suspended ceiling are determined by the buildings seismic design category. The above information is correct to the best of our knowledge at the date of issuance. Seismic performance during large california earthquakes prompted fema to address suspended ceiling performance during a seismic event.

However in the absence of a specific ac for this purpose ic es allowed ac156 to act as the basis for all seismic testing and evaluation for the acoustical ceiling suspended ceilings industry. Wires are arrayed 90 from each other and at an angle not exceeding 45 from the plane of the ceiling. They should be at a maximum angle of 45 from the plane of the ceiling grid. Seismic splay wires are to be four 12 gauge wires attached to the main beam.

Astm e580 section 5 2 8 2 seismic splay wires shall be attached to the grid and to the structure in such a manner that they can support a design load of. Astm e580 section 5 2 8 2 seismic splay wires shall be attached to the grid and to the structure in such a manner that they can support a minimum. This is only intended as a quick reference. Armstrong ceiling and wall solutions is the industry leader in seismically tested ceiling wall and suspension systems so you can design and install with confidence.

Seismic splay wires are to be four 12 gage wires attached to the main beam. Prevent injury caused by failure of grid ceiling systems during seismic activity. Armstrong seismic rx icc es recognizes armstrong seismic rx suspension systems as seismic code compliant solutions to meet esr 1308. Rigid braces should be installed in pairs orthogonal to each other and in combination with a vertical hanger or strut.