Constructed from narrow aluminum extrusions filled with a proprietary fire blocking internal member, Aluflam's curtain wall frames have up to 120 minute rating for interior and exterior installations. Aluflam curtain wall products are fully tested and listed by Underwriters Laboratories to UL 263 and UBC 7-4 (1997) standards. All Aluflam fire-rated products are MEA approved for use in the City of New York.