with high STC sound control ratings, come with Krieger manufactured stainless steel cam lift hinges.

Krieger cam lift hinges are manufactured out of stainless steel, thus allowing for many years of trouble free operation. They are available in all standard Builders Hardware finishes plus the new powder coat finishes comprising of many outstanding colors for our KriegerSonic Soundproof Doors.

The bottoms of the sound proof doors are the hardest part of an acoustical assembly to maintain sound control. The use of the cam lift hinge for acoustical assemblies enables the door bottom seal to be adjusted quickly and accurately at the time of installation and also for adjustment after many years of operation. The cam lift hinge allows the soundproof door to be lifted up during the opening cycle and allows the door to drop during the closing cycle, this helps the door bottom achieve a positive seal on the acoustical threshold.

The weight of soundproof doors will vary depending on size and STC rating. (Refer to the acoustical comparison chart in this Web site or the door schedule sheets of shop drawings for weight of door or contact Krieger's engineering department). If your model does not include cam lift hinges, Krieger recommends the use of heavy-duty ball bearing hinges to prevent sagging that can result in sound leaks.