Safco Fire-safe steel with powder coated finish, will not burn, melt or emit toxic fumes. Units qualify under NFPA Life Safety Code 101, Section 31 ADA and OSHA Compliant Highly puncture-resistant, solid ribbed steel construction with rolled wire rim top for added strength. Raised bottom prevents heat transfer to floor. UL Classified: Approved only to burning paper containment and resistance to temperature rise of surrounding surfaces.