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Prevention & protection

File prevention and protection terms.

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Prevention & protection

Breakaway connexion

Fire safety; Prevention & protection

A joint connecting a fire damper sleeve and attached ductwork that will allow collapse of the ductwork during a fire without disturbing the integrity of the fire damper.

Arm-over

Fire safety; Prevention & protection

A horizontal pipe that extends from the branch line to a single sprinkler or a sprinkler above and below a ceiling.

Batten

Fire safety; Prevention & protection

A horizontal pipe, tube, or other structural shape in a pocket of or attached to a fire safety curtain.

Brim line

Fire safety; Prevention & protection

A horizontal plane intersecting the point of the front opening of the helmet at the midsagittal plane.

Portal

Fire safety; Prevention & protection

A horizontal roadway or pedestrian entry to or exit from the subterranean space.

Spacing

Fire safety; Prevention & protection

A horizontally measured dimension related to the allowable coverage of fire detectors.

Large-diameter hose

Fire safety; Prevention & protection

A hose of 31⁄2 in. (90 mm) or larger size.

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