The Special-Lite SL-17 FRP Flush Door has successfully completed 5 million cycles under the Window & Door Manufacturers Association's NWWDA T.M. 7-90 cycle-slam test.
A severe performance test, NWWDA T.M. 7-90 is used to determine the physical endurance of a door and associated hardware connections under accelerated operating conditions. Under this protocol, every four seconds the door starts at a fully closed position, is completely opened and then slammed to a closed position again.
Architectural Testing, Inc. (ATI) performed the cycle-slam testing between
2005 and 2007. Every 500,000 cycles, ATI conducted thorough visual inspections-checking hinge seams for signs of sag or separation from the door frame. After a total of 5 million cycles, there was no hinge separation or operational damage to the Special-Lite SL-17 FRP Flush Door.
This test was performed in addition to an earlier 25 million cycle test conducted by ATI in accordance with ANSI A250.4, where a Special-Lite SL-17 FRP Flush Door was opened and closed at a normal rate of speed.
For an SL-17 FRP Flush Door product brochure and/or the NWWDA T.M. 7-90 cycle-slam test results, please call 1-800-821-6531 or visit www.special-lite.com.
About Special-Lite, Inc.
Based in Decatur, Michigan, Special-Lite manufactures complete entrance systems consisting of flush, monumental, colonial doors, panels and framing for new construction and replacement installations in educational, commercial, institutional, industrial and municipal applications. The company was founded in 1971 and pioneered the use of fiberglass reinforced polyester (FRP) material for door skins in the early 1980's, and today is the largest volume producer of FRP doors in the U.S. Special-Lite's entrance products are the first and only to earn GREENGUARD Indoor Air Quality Certification®, including the stringent new Children & Schools Standard(TM).
The GREENGUARD INDOOR AIR QUALITY CERTIFIED Mark is a registered certification mark used under license through the GREENGUARD Environmental Institute.