5 x 4.5 in Standard Weight Full Mortise Ball Bearing Steel Hinge - Non-Removable Pin - Satin Chrome (26D) Finish
Steel or stainless steel leaf type hinges that meet the construction requirements shown in Table 6.4.3.1 of NFPA 80, 2010 Edition for leaf size and thickness are not required to be Listed by a nationally recognized testing laboratory such as Underwriters Laboratories, Inc. Additionally, steel or stainless steel hinges as described in this Table may be used on wood or steel swinging type fire doors without any fire testing of the hinges being conducted. This is due to testing experience that shows that the use of steel or stainless steel leaf hinges does not affect the performance of the doors in relation to the test Standard and that the Standard has no effect on their performance in a door assembly