what is positive pressure

RELATED FAQS

Question
Answer
The MA lock does not have Vandlgard or a breakaway trim feature, however, the lever spindle on the MA lock will shear if too much force is applied in order to prevent internal lock damage and resis...
Follow the steps below to troubleshoot the problem. Measure the voltage at the electric strike. If the strike is FSE and not locking there should be no voltage at the strike and if it is FS there ...
The UBC (Uniform Building Code) was a regional legacy building code which was superseded in most jurisdictions by the IBC (International Building Code). There may be some areas of the country which...
The L-Series doors are designed for virtually all construction requirements in commercial building applications. They have also been tested and approved for uniform wind load per ASTM E330.  ...
Power Boost is a positive latching feature that increases the latch force, to over come building stack pressure or door weather stripping, etc, if the door stops before coming completely closed. T...
AL-Series and discontinued D Lever-Series locks use castle nuts to hold the chassis to the spring cages and to keep the chassis positioned in the door. This causes confusion at times when the lock ...
LCN does not recommend this type of installation, and has never sold a coupler to do this.
Blast and pressure resistant doors protect people and property from explosions and shrapnel. More damage is generally caused by shrapnel than the blast itself, and a properly specified and engineer...
Steelcraft Blast Resistant Assemblies meet the following Blast Test Standards:                    ...
The pneumatic operators are designed to function with an input air pressure to the 7901/7902 Series control box of 80 (min) 100 (max) PSI, and an output pressure of 60 to 80 PSI to the pneumatic (2...
If an Size 1 (ADA) closer is set to 5 lbs. opening force, it will only have about 3 lbs. (60/70%) closing force. If the closer will not close against air pressure, but the ADA requirements have to ...
A lock is any device which prevents access or use by requiring special knowledge or equipment. Mechanical locks are mechanical devices which secure an opening by keeping a door closed until a relea...
To correctly answer this question, we need to know how much more force is required to get the door closed. They could try turning the Rod & Shoe over (short side of shoe towards the hinge), or they...
Deadbolt Locks (Deadlocks): a lock with a bolt which requires a deliberate action to extend and which resists end pressure in the unlocking direction when fully extended Medium, high to extra he...
H-Series doors in single leaf applications with only mortise locks meet the FBC / NOA Zone 4 requirements? 3070 max flush outswing applications Zone 4 requires 120 to 170 psf.
The wires on 6000 series electric strike solenoid are non polarized.
There are several Schlage and/or Falcon locks that have been tested and approved for this application. For Commercial use the locks have been tested and approved as assemblies wit...