What Is A Throw Bolt?

Bolt projection or bolt throw is a distance from the edge of the door, at the bolt center line, to the farthest point on the bolt in the projected position.A double cylinder lock is one which has a key-actuated cylinder on both the exterior and interior of the door.

What is a throw in door hardware?

Throw (of a deadbolt or latch bolt)-Measurement of the maximum projection when bolt is fully extended. Thumb Piece (of a handle)-The small pivoted part above the grip of a handle to be pressed by the thumb to operate a latch bolt.

What is the throw on a latch?

Latch Throw – Recent editions of NFPA 80 no longer state the required latch throw – the distance that the latch must project from the door edge.

What is a lock throw?

The outward movement of a lock bolt and the distance which it travels under the action of a spring or key. Shoot applies more particularly to spring bolts, throw being a better word for dead bolts. 2. The sliding part of a door bolt.

Why is it called deadbolt?

Deadbolts are considered to be secure locks that are difficult to open without a key, especially when compared to a spring-loaded lock, the kind you see in the center of a doorknob. While spring latches can be pushed back manually, deadbolts can’t — which is why they’re called deadbolts. They’re dead, or unmovable.

What is the throw bolt on a door?

Bolt projection or bolt throw is a distance from the edge of the door, at the bolt center line, to the farthest point on the bolt in the projected position. Burglary resistant glazing means those materials as defined in U.L. Bulletin 972.

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.

Is a latch a lock?

A latch fastens a door, gate or window in position but does not provide security.A lock prevents anyone without a key from opening a door/gate/etc.

Do latches need to be fire rated?

To comply with fire regulations, there’s two types of closers for non-latched doors.Locks and latches help provide an effective barrier to a fire, which is why they must be CE marked and comply with BS EN 12209. A fire door must remain closed within the frame and therefore a latch or lock will ensure this happens.

What is a Deadlatch on a door?

“Deadlocking plunger” (also called “deadlatch plunger” or “deadlock plunger”) is the name of a very important piece of a door lock assembly; it keeps a locked door from being opened with a small screwdriver or credit card.

What is a door key?

noun A key for locking and unlocking a door.

What are key teeth called?

Canine (cuspid)
Both the maxillary and mandibular canines are called the “cornerstone” of the mouth because they are all located three teeth away from the midline, and separate the premolars from the incisors.

What does a keying schedule look like?

For example, you might have three buildings. Each building has six locks keyed differently and a submaster key that operates all the locks within a single building. The master key opens all the locks in all three buildings, but the submaster from one building will not open any lock in either of the other two buildings.

Who invented dead bolt?

Linus Yale Sr.
The earliest patent for a double-acting pin tumbler lock was granted to American physician Abraham O. Stansbury in England in 1805, but the modern version, still in use today, was invented by American Linus Yale Sr. in 1848.

Why do doors lock twice?

Some door locks are designed to be turned twice for added security. Sometimes they are an anti picking feature because after you pick the lock and turn it, the pins will reset and you will have to pick it again.

What is the difference between a deadbolt and a deadlock?

Well, deadlocks and deadbolts are the same in that they both need a key to lock. However, while a deadlock can only be unlocked in deadlock mode with a key, deadbolts can be locked and unlocked with a key and have a metal lock that extends from the door into the wall.

What do you call a key that opens all doors?

A skeleton key is a key that has been filed or cut to create one that can be used to unlock a variety of warded locks each with a different configuration of wards.A skeleton key has the warded section of the key removed so that it opens all the doors of a system.

What do you call the lock on the door?

The Bolt: Also called the latch, the bolt engages the inside of the door. There is a piece of metal that extends from the door into the frame itself. This bolt is used to hold it closed. The Box:The bolt extends from the cylinder into a hole that is designed to fit the bolt perfectly.

What is barrel bolt?

Definition of barrel bolt
: a door or sash bolt made to slide into a cylindrical socket.

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 are cremone bolts?

: 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.