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Page 46 of 332 Chapter 3 — System and site requirements
553-3021-209 Standard 3.00 April 2000
Earthquake bracing requirements for chassis installed on a
wall in a vertical position
Note:
The earthquake bracing method for the Option 11C Mini does not
guarantee that the system will continue to operate during or after an
earthquake.
To earthquake brace your system, use a piece of 3/4 in. (20 mm) plywood as
a backboard. Fasten the plywood to the wall with a minimum of six fasteners.
(Refer to Table 9 on page 47 for a description of the appropriate fasteners.)
Fasten the chassis to the backboard.
Table 8 identifies the maximum acceptable wall height for different types of
stud wall construction in areas prone to earthquakes.
IMPORTANT
The following earthquake bracing guidelines meet the requirements
for the state of California specifications in the United States. Other
areas or countries can have different requirements.
CAUTION
For earthquake bracing, you must install the Option 11C Mini chassis
on a wall in a vertical position.
Table 8
Minimum wall requirements – stud construction
Wall Studs
Spacing off
center
Maximum Height of
Wall
2 in. x 4 in. wooden studs 16 in. or 24 in. 10 ft
2 in. x 6 in. wooden studs 16 in. or 24 in. 16 ft
3 5/8 in. 20 gauge metal studs 16 in. or 24 in. 12 ft
3 5/8 in. 18 gauge metal studs 16 in. or 24 in. 16 ft