Heavy Duty Hold Open Arm

Product description

Hold Open (HO) or Hold Open Arm

A hold-open arm holds the door open at a predetermined degree of opening. Mechanical hold-open arms are not acceptable for use on a fire door assembly, but electronic hold-opens may be used if released by the fire alarm system or a smoke detector. A fusible link arm is a hold-open arm that incorporates a link that melts when it is heated. These were originally used as hold-open arms for fire doors, but today’s codes require hold-open devices used in most fire door locations to be smoke-activated.

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