There are four corner stabiliser bars. One for each corner. The corner stabiliser bars are positioned on the end hoop and the first intermediate hoop (fig 5a). On the 6ft wide polytunnel the corner stabiliser is 1.57m long (25/157FF) and is flat on both ends.
Starting on the first intermediate hoop in from the end hoop, position a Q clip (Q25) 18cm up from the hoop and foundations joint (fig 5b). If the Q clip is stiff use a hammer to tap onto the tube. The bottom of the Q clip should be on the 18cm mark. Once the Q clip is on the hoop and in place use a pair of pipe grips to close the prongs together. Locate the flat end of (25/157FF) to the outside of the Q clip (Q25) push a bolt through the hole ensuring the threaded part is on the inside of the polytunnel, and firmly tighten with a nut (fig 5c). Position another Q clip on the end hoop and locate the flat end of (25/157FF) to the Q-clip, push a bolt through the hole and loosely secure with a nut (fig 5d). Place a spirit level on the end hoop and adjust the Q clip up or down until the hoop is vertically aligned and firmly tighten the Q clip.
Repeat this process on each corner of your polytunnel.
Click to enlarge
5a
5b
5c
5d