What is a door selector?
The door selector holds the first opening leaf open until the second leaf has closed – this ensures correct closing sequence on a pair of rebated double fire doors.
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).
What is a door coordinator?
Door coordinators are used on pairs of double doors to hold the active door open while the inactive door is allowed to close. Once the inactive door closes, the active door is allowed to close.
What is a door sequencer?
Essential for the correct and safe closing of double-leaf hinged fire and smoke doors. Ensures that both door leaves close in the correct order.
What is a fire door selector?
The MK2 Fire Door coordinator also known as a selector, will enable a pair of self closing doors with or without rebated meeting stiles to close in the correct sequence, irrespective of which door is opened first, maintaining the doors fire resistant seal.
What is a sequence selector?
Sequence Selector 180mm Keeps the active fire door leaf open until the inactive leaf closes first. Easy to install for correct closing.
Can I use a concealed door closer on a fire door?
These doors require a controlled closing feature to ensure that fire doors are able to fully latch. As concealed closers require removal of part of the door/frame structure it is particularly important that they only be installed when permitted by the fire door manufacturers and in line with their specifications.
What are door closer sizes?
Most closers are adjustable, but the most common are a size 4 for an external 36 inch wide commercial door, and a size 3 for an internal commercial or residential application. There are some applications that may require a special type of closer, such as a hold open feature, positive or spring stop.
What is the purpose of an astragal?
An astragal is a piece of hardware that is used on a pair of doors to seal the gap between the doors when they are closed. Astragals are different from a mullion because the astragal is fastened to the door itself. A mullion is attached to the frame and the doors stop against it.
Should fire doors be closed at all times?
Fire doors need to be closed to prevent the spread of fire and smoke. Legally, if you wedge open a fire door and it is judged that this puts someone’s life at risk, you could suffer penalties, including a fine or even a prison sentence.
What is barrel bolt?
Definition of barrel bolt : a door or sash bolt made to slide into a cylindrical socket.
Should fire doors slam shut?
In most residential settings, a fire door is legally required to be self closing. This means that they have a fire door closer fitted to the top of the door, to ensure they are closed at all times – which is vitally important in the event of a fire.
What are Grade 7 hinges?
Grade 7 Ball Bearing Hinge (Max Load 40kg). They have a CE mark and are Fire door rated. BS EN 1935 rated. Ball bearing hinges have always been very popular for their smooth operation, durability, long lasting design and ability to carry heavier loads than washered hinges.