What is a door coordinator

A door coordinator helps to ensure that the correct door leaf closes first so the doors can close and latch properly (here’s a video). BUT – when the door has manual flush bolts and no closer on the inactive leaf, the coordinator serves no purpose. The inactive leaf is closed and latched manually (by a person).

What is a coordinator on a fire door?

(7) Coordinator ensures that door leaves close in proper sequence (pairs only). … The same situation occurs when a pair of fire doors is equipped with an overlapping astragal – the proper leaf has to close first. The function of a coordinator is to ensure that the leaves of a pair close in the proper sequence.

What is a bar coordinator?

Coordinators are designed for use on pairs of doors when one door needs to close before the other. The active door lever, located nearest to the active stop, holds the active door open until the trigger mechanism is released by the closing of the inactive leaf.

What is the purpose of door selector?

Product Category: Door Selectors Door selectors are used (generally on fire doors) on double doors where one leaf has to close before the other in order for it to shut properly.

What is a flush bolt?

Flush bolts are used to secure the inactive leaf of a pair of doors, projecting into the frame head and into a floor strike. … Manual flush bolts and surface bolts are projected and retracted manually, and automatic flush bolts are projected when the active leaf closes and depresses a trigger on the edge of the door.

What is a door Astragal?

Attached to the meeting edge of single or double doors, astragals are vertical components designed to seal off gaps that leak air, water, noise, light, and debris. They can also function to detain gases, smoke, or flames in the event of a fire. Last, astragals can increase the security of door locks and strikes.

What is door sequencer?

The CX-SA1 will properly sequence an operator and electric lock (any type) or two doors that form a vestibule and becomes a latching relay with the flick of a switch. …

What is dust proof socket?

Details. To be used in conjunction with flush bolts, these sockets prevent dust and debris from entering into the cavities where more traditional plates would fill up over time. Suitable for timber, concrete and tiled floors and manufactured in stainless steel with a spring loaded plunger.

What is a cremone bolt?

Definition of cremone bolt : a fastening used on double doors and casement windows that has vertical rods moved up and down so that the ends of the bolts engage the top and bottom of the frame.

What is a surface bolt used for?

Door Bolt and Surface Bolt Selection. Use a door bolt or surface bolt to hold shut doors, windows, cabinets, gates or shutters. We carry a wide selection of surface and door bolts in solid brass and forged iron in sizes up to 24″. Available in a variety of attractive finishes.

Article first time published on

HOW DOES A door sequence selector work?

these sequence selectors are installed to the underside of a projecting head and operate in the following manner: If a door (a) is pushed open, the unit does not need to operate, but if door (i) is pushed the rebate at the nose of the door pushes open door (a).

How does a sequence selector work?

Sequence selectors are designed for use on double doors with rebated meeting stiles, overlapping seals or latch mechanisms that require the door leaves to close in the correct sequence.

What is the gap between two doors called?

Double doors often require a hardware device known as an “astragal.” The astragal helps seal the gap between pairs of doors, and is used to block sound or air drafts. Before you install an astragal, you must first determine how your doors are configured, as well as what size astragal you need to use.

What is the strip between two doors called?

Astragal: A strip of steel or wood, which covers or closes the gap between the edges of a pair of doors.

What is a door mullion?

Mullion. A mullion resembles a stile. It is the vertical component that separates two panels located in the middle of the door between the rails.

What is the meaning of bolt the door?

verb. When you bolt a door or window, you slide the bolt across to fasten it. He reminded her that he would have to lock and bolt the kitchen door after her. [ VERB noun]

What is cremone hardware?

Cremone bolts are typically used on exterior french doors or windows. … Often rabbeted doors are used for a traditional detail. The geared action in the ‘cremone box’ was developed in France to allow two surface bolts to articulate locking or unlocking the door by using one lever or oval knob.

How do I install surface bolts?

Position the bolt right on the edge of the door and ensure that it isn’t touching on the frame. Then, mark the first screw hole with a pencil. Drill in a bit to fit the first screw. With the help of a drill, insert the screw in the screw hole, but do not completely tighten it.

How does automatic flush bolt work?

Automatic flush bolts are projected and retracted without any manual operation required. When the active leaf is opened, the flush bolts are retracted, allowing the inactive door to open. … When the active door is shut again, it will push these buttons and cause the bolts to re-latch.

How secure is a barrel bolt?

In today’s security conscious communities barrel bolts are one of the most common types of security device firefighters encounter on the fireground. The reason for this is simple: barrel bolts are cheap, easy to install and provide excellent security against the criminal element.