seismic products seismic enclosures overview
technical information
seismic products
seismic enclosures overview
763.422.2211
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Spec-00490
G
Seismic Enclosures Provide an Extra Measure of Protection
The use of seismic-rated enclosures is recommended in areas where earthquake activity is possible. In addition, power plants,
railroads, airports and other installations use rack-mounted electrical and electronic equipment that is subjected to vibration and other
motion which may over-stress equipment framework, components and connections. Adequate enclosure frame strength and rigidity
are necessary under these conditions.
Seismic Enclosure Standards
Industry standards define global geographical areas as
earthquake-risk Zones. Referring to the seismic map below,
ground motion risks are numbered from 0 to 32+ with 32+
corresponding to the highest risk areas. Geographic areas
designated as 0-2 present no substantial earthquake risk.
Conditions Other Than Earthquakes
Equipment may need to withstand the effects of movement or
vibration in areas close to railways, airports, power plants and
other areas subject to similar conditions.
Seismic Hazard Zones in the United States
Washington
Montana
Oregon
Idaho
Wyoming
Nevada
Illinois Indiana
PACIFIC
OCEAN
Utah
Missouri
California
Kentucky
Tennessee
Arkansas
Arizona
ATLANTIC
OCEAN
South
Carolina
GROUND MOTION RISK
HIGH
32+
24-32
16-24
8-16
4-8
2-4
LOW
Alaska
0-2
Hawaii
Map Creator:Nneka Granderson
Date: 03/31/2012
Source: United States Geological Survey
(http://earthquake.usgs.gov/)
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technical information
500
250
0
500
1,000
1,500
Miles
SUBJECT TO CHANGE WITHOUT NOTICE
EQUIPMENT PROTECTION SOLUTIONS
Spec-00490 G
seismic products seismic enclosures overview
Hoffman Seismic Products
Hoffman performance-tests its seismic products according to
Telcordia GR-63-CORE Network Equipment Building System
(NEBS™) requirements for physical protection. These enclosures
can also be manufactured to comply with all applicable national
and international standards, such as the California Building Code
(CBC) and International Building Code (IBC).
Seismic Compliance
A Telcordia GR-63-CORE compliant test must be conducted by
a Nationally Recognized Testing Laboratory (NRTL) or other
recognized independent laboratory before compliance will
be issued. This test is conducted on an installation-specific
basis with customer-installed equipment and cabling mounted
inside the enclosure. In other cases or in addition to, a licensed
structural engineer must certify the installation.
Hoffman helps facilitate the Office of Statewide Health Planning
and Development (OSHPD) building approval with pre-approval of
Manufacturer's Certification (OMP).
The OPM program is a voluntary program for review and preapproval of seismic design of nonstructural components used in
health facilities construction in California, per California Building
Code, CBC 2013.
Enclosure mounted on shaker table
Time-motion history generated in front to back seismic enclosure test
NEBS™ is a trademark of Telcordia.
EQUIPMENT PROTECTION SOLUTIONS
Spec-00490 G
PH 763.422.2211 • FAX 763.422.2600 • PENTAIRPROTECT.COM
technical information
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