NOTE: Twin support braces can be fitted anywhere either side of the central ridge but they MUST avoid the crop bars and storm stays.
Your twin support installation is fitted in the same way as the central ridge assembly. Your twin support will be supplied in sections which slot together. There is one 61cm piece which is plain on one end and swaged on the opposite end (35/61PS). The remaining pieces are 1.9m long and are plain on one end and swaged on the opposite end (35/190PS).
Slot the swaged end of short piece (35/61PS) into the plain end of the long piece (35/190PS) and secure using a self-drilling screw with the provided driver socket 4cm from the joint. This piece will be placed in position using ridge clamps (R6035). Position a ridge clamp on the first and second hoop ensuring the threaded section of the clamp on the end hoop is to the inside of the polytunnel (fig 12a). Slide the twin support tube tube through both ridge clamps ensuring the plain end is on the end hoop, tighten the end clamps with the plain end of the ridge tube protruding as little as possible through the ridge clamp (fig 12b).
Work along adding sections of twin support tube and securing to the hoop using ridge clamps. Secure the two tubes together using a self-drilling screw (SDS55) 4cm from the joint. The final twin support tube will exceed the length of your structure, you will be required to trim the tube so it is protruding as little as possible through the ridge clamp (fig 12c).
NOTE: The ends will be sharp, protective tape will be applied at a later stage.
Click to enlarge
12a
12b
12c