The installation instructions are utterly abysmal. For example, the introduction mentions "plastic concrete pipes of about 800mm which are placed in a non-freezing depth for the fastening of the corner and/or middle anchors" - I guess they may mean "plastic OR concrete" but 800mm seems an extraordinary depth considering the length of the anchors. Also there is no mention of the required diameter of these pipes. Most of the "instructions" are simple diagrams that often only hint at the required sequence of construction. Fortunately, you can find helpful videos on YouTube but Halls don't tell you about them.