BP-913, Purlin Mounting Kit Purlin Mounting System for Hanging Skyblade Fans Along Purlin Ceiling Braces (Hardware Included). BP-915 I-Beam Mounting Kit I-Beam Mounting Kit For SkyBlade Fans Unistrut, Angle Iron, I-Beam and Purlin Mounting Kits available Guywires/gripple 1/4" powder-coated and chassis Stainless steel safety brackets included