Fire-Rated Solutions

In high-traffic corridors and hallways where fire separation and uninterrupted aesthetics are both priorities, SOSS fire rated invisible hinges provide tested Underwriters Laboratories fire rated certification while remaining completely concealed for a clean architectural look. Their heavy‑duty construction and high‑cycle durability help ensure long service life in busy public circulation zones, and models are available for both wood and metal door assemblies to meet project requirements. For specification sheets, UL classification details and product selection guidance, see the SOSS Catalog.

Utility and service rooms often require fire rated doors but also benefit from tamper‑resistant hardware; SOSS fire rated concealed hinges combine code‑compliant fire performance (20 minutes up to three hours, depending on the assembly) with concealed hardware that reduces exposed snag or tamper points. The grade 316 stainless steel options let you select corrosion resistance for mechanical or wet environments while maintaining required fire ratings. For installation guidance, load ratings and product downloads, consult SOSS product resources.

For exterior entry doors and other rated openings, SOSS fire rated invisible hinges give architects the ability to hide hardware without sacrificing structural performance or the availability of heavy‑duty and stainless models suitable for exterior exposures. These models are engineered for both wood and metal assemblies and can be specified to meet the fire rating and security needs of commercial and institutional exterior doors. Use our Hinge Calculator to find the right hinge for your project and fire rating requirements.