It is known as a thermal pin sometimes referred to as a fire pin and is comprised of a spring loaded steel pin with a plastic cover over it.
Fire pins for fire doors.
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On the doors the fire label is located on the hinge edge between the top and 2nd hinge preparation.
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Are astragals required on fire doors.
Similar to the fusible link in hardware when the thermal pin.
Fire labels ul its whi or fm are located as follows.
For most applications an auxiliary fire pin is required in order for the doors to maintain their fire resistance rating.
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The black cap visible on the face of the auxiliary fire pin and the strike hole plug must melt in order for the bolt to extend.
On the street there are various reasons a hinge side attack with a saw or the irons might be preferred.
Even basic hinges for outward swinging doors are typically.
Right to your door.
The purpose of the auxiliary fire pin assembly is to keep the doors in alignment during a fire.
When are fire pins required on doors related faqs.
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3 hour fire rated pairs.
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Hardware on fire door assemblies has to have an active latchbolt to prevent the pressure caused by a fire from pushing the door open and allowing smoke and flames to spread.
Double doors swinging in the same direction double egress swinging in opposite directions fire rated dutch doors fire rated 1 3 4 t.
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In a fire the bolt extends from the auxiliary fire pin into the strike hole in the opposite door leaf.