Warnock Hersey Fire Doors Asbestos

Intertek s warnock hersey mark is a mark certifying product safety and performance used in north america including on wood fire rated doors.

Warnock hersey fire doors asbestos.

May be labeled and classified by warnock hersey international or underwriters laboratories as 45 60 90 minute rating. This mark is widely recognized throughout the industry appearing on fire doors and frames found in north america and beyond. I seem to remember the old super six going from asbestos to fibre cement in the mid 70 s not much knowledge on fire doors though mmmmmm just googled super six up and it stopped asbestos in 1985 but i m pretty sure i never used it in the late 70 s. Intertek is a company that ensures products meet safety health environmental and quality standards for almost any product.

There are two asbestos fiber classifications. Contains chrysotile or soft white asbestos. These doors are labeled and classified by warnock hersey international inc as fire barriers in sizes up to and including 4 0 x 8 0. The warnock hersey mark can be found on more than 6 500 products ranging from fire doors hardware hearth plumbing and construction products.

Utilizing the warnock hersey mark on a product reflects a commitment to product safety performance and quality to inspectors builders and end users. Asbestos is a group of naturally occurring non combustible silicate minerals composed of glass like fibers. Doors are capable of meeting the requirements for both positive and neutral pressure fire tests including ubc 7 2 1997 ul 10c 1998 nfpa 252 1995 astm e 152 1982 and ul 10b 1997 including the hose stream.