FloorPort Service Fittings for Resource RFB® Series Floor Boxes Walkercell® Cellular Raceway and Walkerdeck Systems provide flexibility in recessed and furniture feed applications. The enhanced design also increases the ease of use and color options while continuing to exceed UL scrub water requirements. These covers are ideal for use in a wide variety of applications including educational facilities airports and commercial and institutional office buildings. The covers are UL Listed to U.S. and Canadian safety standards and are fire classified for use on Walkerdeck Systems and Cellular Decking Systems in accordance with Floor-Ceiling Design Numbers D739 D832 and D858. Consult the factory for specific fire classified designs.