1.Unfold the pre-assembled Fixed Triangle Rack, lock the bolt tightly;
①If it is trapezoid metal roof, install the Fixed Triangle Rack on the rooftop in the correct position as planned, drilling the screw into the roof beam below.
②If it is non trapezoidal metal rooftop, install the Clip Lock on the rooftop first then install the Fixed Triangle Rack on the Clip Lock.
③If it is flat concrete rooftop, install the Fixed Triangle Rack on the rooftop directly with the expansion bolt, or install them on the cement block through embedded bolt.
