PVC Clip Spacing

[swampgator352]

Hi all. One of the last things I need to order this year are PVC mounting clips to attach my roof outline. Can anyone recommend a general rule of thumb for spacing them apart? I'm trying to avoid massively over/under ordering. Many thanks!

 

[KiwiPhil]

depends on the weight and regidity of what youre hanging - 1m - 1.5m should be about right for 20/25mm conduit with pixels