Krieger Specialty Products
Krieger’s door assemblies are custom-engineered to ensure various special purpose performance requirements, which is why it’s critical to choose the right type of lock to meet your needs.

Cylindrical Locks
Krieger perimeter seals are 1 ⅛" high. Rose/rosette plates for lever trim (with spring assembly) will overlap Krieger perimeter seals at 2¾" backset; and, if a knob is used, there is very little grasping clearance. Krieger recommends using a 3¾" backset for either levers or knobs on acoustical doors.

Mortise Locks
Mortise locks are only available with a 2¾" backset, which is why we recommend using lever handles instead of knobs to ensure proper clearance. Rose/rosette plate diameters should not exceed 3".

Unit Locks
Unit locks such as the Corbin 300 are not recommended under any circumstances. These locks require that the entire edge of the door be notched out. The escuthcheon is too close to the edge of the door and hits the perimeter seal preventing contact between the door and the seal. Krieger cannot certify any acoustical ratings with this type of lock.

Pushbutton Locks
Because the Simplex Unican Series 1000 Digital control lock is very sensitive, we recommend specifying a “roller strike” when using this lock in conjunction with NC-6 magnetic seals. We also suggest substituting a latch bolt with a 3¾" backset. As an alternative, consider using the Yale eBOSS E5400LN, Alarm lock Trilogy DL 2500 series digital cylindrical lock with a 3¾" backset, or Schlage “AD” pushbutton lock.

Locks for 3" Thick Sound Control Doors
The combination of dual seals, 2¼" in height and the increased door thickness somewhat limits the selection of latching hardware that is compatible with this design. We recommend using a cylindrical lock with a 5" backset, a 5" backset Mortise Lock series 9100 by Accurate Lock, or consulting Krieger before making your final selection.

Electric Strikes
We suggest using an electric lock in lieu of an electric strike. Electric locks permit seals to be adjusted properly, which substantially reduces the risk of compromising the sound rating.

Most electric strikes are too sensitive and bind up when used with “compression” type seals and for that reason we do not recommend they be used together.

Compression seals create pressure between the lock latch bolt and the gate of electric strike, which will not allow the gate to activate and retract. If electric strikes must be used, then magnetic seals should be utilized.

Electric Latch Releases
A new development in electric latch releases for acoustical assemblies is the SECURITRON “UNL” Unlatch Strike for cylindrical locksets and the “MUNL” Mortise Unlatch Strike for mortise locks.

Electric Strikes and Door Pairs
Some electric strikes for pairs of custom doors (such as the Von Duprin - 6220 Series) require a cut-out through the door. We do not recommend these types of strikes because of this cut-out and they will not work with the overlapping astragals.

Contact us to review electrified locks you are considering to ensure their compatibility with perimeter seals, proper operation, and noise reduction requirements.

Electric Locks
Electric locks for acoustical doors and other custom doors require low voltage power routed through the door. At conventionally hinged (level swing) openings this transfer is best done with wired level swing hinges and Krieger’s electrified Cam Lift Hinge for acoustical doors with Cam lift Hinges, or if required, a separate power transfer device such as the Von Duprin - EPT2 or ABH-PT200 can be used.

705 Door and Lock Package
Krieger offers the 705 SCIF Door and Lock Package to meet SCIF Sound Groups 3 and 4 standards, and comes installed with a Sargent & Greenleaf or Lockmasters locking device. Meets 705 standards and locking devices meet the federal specifications FF-L-2890B and FF-L-2890C.

Krieger offers the option to add radio frequency (RF) 40 dB protection, allowing the 705 SCIF Door and Lock Package to be used in RF areas as well as TEMPEST facilities.

The complete package includes a door panel, frame, hinges, closer, locking device, threshold, door bottom, and seal system. Learn More