Fire Protection · F-97ZS8

Branch Line Restraint

Materials

Steel

Elements

Anchors / Embeds

Connections

Base Plate / Anchorage

About this detail

This seismic restraint detail shows a fire sprinkler branch line secured with an adjustable ring hanger, vertical all-thread rod, and a 45-degree angled restraint rod attached to the building structure. The vertical restraint uses a three-eighths-inch all-thread rod with a nineteen-inch maximum length or a half-inch all-thread rod with a twenty-five-inch maximum length, positioned within six inches of the line hanger. A swivel attachment connects the diagonal restraint rod to the anchorage point above. Omit restraints on lines hung with rods six inches or less in length measured between the top of the pipe and the building structure attachment. A companion maximum spacing table provides allowable distances for steel pipe restraints based on pipe sizes from one-half inch to two inches and varying seismic coefficients per NFPA 13.

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