5. Seismic Separation Assembly
6. Earthquake protection for sprinkler piping
7. Typical Location of Bracing on a Looped
System
Systems having more flexible couplings than required
above shall be provided with addiƟonal sway bracing. A
lateral brace shall be provided within 24’’ (600mm) of every
other coupling unless pipes are supported by rods less than
6’’ (152mm) long from the veiling or by U-type hooks
underside of the structural element. (NFPA 13 - 2007 9.3.2.
& 9.3.5.)
A
B
10 in. (254mm)
long nipple C
Normal
Position

Normal

8 in. (203mm) Position 8 in. (203mm)
4 in. (102mm) 4 in. (102mm)
Longitudinal movement
Longitudinal brace
(two-way)
40 ft 40 ft
（12 m） （12 m）

No bracing

Longitudinal brace
(two-way) Four-way brace
Lateral brace
(two-way)
FIRURE A.9.3.5.6 (d)
Typical LocaƟon of Bracing on a Looped System.
Lateral movement
4 in. 8 in.
(102 mm)

（

203 mm）
Plan
Elevation
Horizontal Views
Fire sprinkler main

Vertical movement
Normal position
Ell
Ell
Ell
Ell
Nipple E
2 ell lengths
81/2 in. (216mm) for 3 in. (76mm) pipe
71/2 in. (191mm) for 21/2 in. (65mm) pipe
FIGURE A.9.3.3 (a) Seismic Separation Assembly. Shown are an 8 in. (203mm) Separation Crossed by Pipes up to 4 in. (102mm) in Nominal Diameter. For other separation distances and pipe sizes, lengths and distances should be modified proportionally.
A Four-way brace at riser
B Lateral brace
C Lateral brace
D Short drop [Figure A.9.3.2 (b)]
E Coupling at wall penetration
F Longitudinal brace
Building