Instructions / Assembly

See Preparing the Mounting Structure: I-Beam for instructions.

☐ Big Ass Fans does not recommend mounting the fan to a fabricated

I-beam.

☐ Do not mount the fan directly to an I-beam without the upper mount,

extension tube, and lower yoke.

☐ The I-beam must be part of the existing building structure.

☐ Install spacers if the ﬂange thickness exceeds 3/8” (10 mm).

☐ For an angled I-beam or pitched roof, the beam ﬂange width must

be 5” to 9-7/8” (127 to 251 mm).

See the instructions included with the Z-Purlin Kit.

☐ Purlin length: ≤ 30 ft (9.1 m)

☐ Purlin spacing: ≤ 5 ft (1.5 m)

☐ Purlins must be made from minimum 14 gauge steel.

☐ The angle iron length must be ≤ 5 ft (1.5 m) and 1 in. (25 mm) less

than the distance between purlins.

☐ Angle iron W x H x T = 3” x 3” x 1/4” (76 x 76 x 6 mm)

See the instructions included with the L-Bracket Kit.

☐ Beam thickness up to 14-3/8” (365 mm).

☐ The installer must supply suitable 1/2”-13 Grade 8 mounting

hardware.

See Preparing the Mounting Structure: Bar Joists for instructions.

☐ The installer must supply angle irons and suitable 1/2”-13 Grade 8

mounting hardware.

☐ Do not install the fan from a single purlin, truss, or bar joist.

☐ Angle iron spans should not exceed 12 ft (3.7 m).

☐ The angle irons must be fastened to the roof structure at each end.

☐ Do not use beam clips on angle irons.

MOUNTING GUIDE

Consult a structural engineer to determine the appropriate mounting method for your building structure. The

safety cables are required for all mounting methods.

Bar Joists

I-Beam

Z-Purlins

Solid Beam