where are door seals

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The regulation valves are designed to adjust the flow the hydraulic fluid in the closer which regulates the door closing speed through various phases of the closing cycle. The regulation valves h...
Steelcraft have tested different types of doors and frame assemblies using Zero International gasket seals for the various STC ratings. Tests are in accordance to ASTM...
Frames can be installed either KD (knock down) or welded to receive the STC rating.
Steelcraft borrowed light frames are not listed/tested. Check with the glass manufacture if they are listed and with what type of framing used.
Sound seals are required. Zero International Gasket Notes: Perimeter Seals – Zero #475 applies to the stop of the head and jambs. Door bottom – Zero #367, surface applied. Threshold ...
 Cam Lift Hinges are specially designed hinges used mainly on acoustical door assemblies. The Cam Lift Hinge lifts the door during its travel and seats the door bottom for a pos...
Types of astragal offered from Steelcraft are as follows: "Z" Astragal - For information on "Z" astragal types and attachment refer to the TD Manual page 3.3.17. Most commonly used on double ...
Causes for AA battery drain in CO-Series LOCKS - Possible Cause Fix/Corrective Actions  One of the four AA batteries was inserted reversed and the reserved battery drains the other batteries. ...
Causes for AA battery drain in AD-Series LOCKS Possible Cause Fix/Corrective Action 1)      One the four (or eight) AA was inserted reversed and the rese...
A Kerfed Frame is a frame that is formed with an optional integral pocket or recess in the area of the stop to receive gasket, seals or weather stripping. Kerfed frames are available as an&n...
Intumescent seals or gaskets are not required on fire rated steel doors. Generally speaking, the requirement for intumescent seals or gaskets are a function of the individual manufacturers’ listi...
The 20 minute Fire Rating is a valid label and are commonly referred to as "Smoke and Draft control door assemblies". Depending on the local fire code and the openings's applica...