You will always start and finish with an end post. This post has a single bracing strut and a tension bar plus the tensioning fittings for the line wire. Then put an intermediate post every 2 - 3 metres. For long runs, you will need a two-way intermediate post every 50 metres (or every 25m for 1800mm high chain link) this post has 2 bracing struts and 2 tension bars and effectively stops and re-starts the fence on one post. Finally you will need to add a corner post for each right-angled corner. When fitting a gate you will need an end post each side of the gate. As chain link works by being kept under tension, it should always be erected in a series of straight lines. Printable chain link fitting instructions