Seismic separation assembly
Seismic Separation Assembly According to NFPA 13
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Seismic Separation Assembly According to NFPA 13 |
What is seismic separation assembly?
An assembly of fittings, pipe, flexible pipe, and/ or couplings that permits movement in all directions to accommodate seismic differential movement across building seismic separation joints, The extent of permitted movement can be made at least twice the actual separations, at right angles to the separation as well as parallel to it.When shall we install seismic separation assembly?
An approved seismic separation assembly shall be installed where sprinkler piping, regardless of size, crosses building seismic separation joints at ground level and above.What are the required movements of seismic separation assembly?
Seismic separation assemblies shall allow movement sufficient to accommodate closing of the separation, opening of the separation to twice its normal size, and movement relative to the separation in the other two dimensions in an amount equal to the separation distance.What are the types of seismic separation assembly?Seismic separation assemblies are available in traditional assemblies or seismic loops as shown in following figures:
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| Seismic separation assembly |
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| Seismic separation assembly |
What are the installation requirements for seismic separation assembly?
- The seismic separation assembly shall include a fourway brace upstream and downstream within 1.8 m of the seismic separation assembly, each four-way brace should be attached to the building structure on opposite sides of the seismic separation joint.
- Bracing shall not be attached to the seismic separation assembly.
References of this article:
- NFPA 13 - 2019 edition (Sndard for Installation Of Sprinkler System).
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