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Acoustical & SCIF
Bullet & Forced Entry
Blast & Pressure
Radio Frequency
Thermal
Hybrid
Gallery
KriegerSonic
Hardware
Krieger recommends the following closers and guidelines for gaining maximum performance from your sound proof doors. Please note that all U.L. rated sound proof doors will require a closer to be U.L. certified.
Parallel Arm Closers
Mount the arm bracket to the "Z" brackets furnished by Krieger, or use a top jamb mounted closer. Never mount closer arm shoe directly to the seal cover.
Rixson Floor Closers
The arm which must mount in the bottom of the door precludes the use of a mortised door bottom. Krieger does not recommend using this hardware item on sound proof doors.
Concealed Overhead Closer
Krieger cannot certify an STC rating for these closers because they mount directly into the head of the frame and prevent a continuous perimeter seal resulting in sound leaks.
Since cam lift hinge assemblies require closers that allow for 3/8" vertical movement, Krieger offers the following manufacturer and model recommendations, also for Krieger's other Acoustical Assemblies:
Since cam lift hinge assemblies require closers that allow for 3/8" vertical movement, Krieger offers the following manufacturer and model recommendations, also for Krieger's other Acoustical Assemblies:
LCN:
4010, 4020, 4041Dorma:
8900Corbin/Russwin:
DC8000Norton:
7500/7700Sargent:
281, 351Yale:
400/4400Stanley:
D4550
NOTE
Krieger has not received any documentation from Norton, Yale, Corbin/Russwin validating Krieger's recommendation)
Closers Not Recommended for Use With Cam Lift Hinges
Heavy Duty Rigid closer arms will not allow 3/8" vertical movement. Closers with a large Hold Open knuckles at the elbow that will not allow 3/8" vertical movement. Slide track type closers. Overhead stops.
