pipe support material budget estimation

Hi,

Anybody here know about how to estimate the cost of pipe suport material?such as spring support,strut,snubber and so on.I know it's mostly based on the quantity and work condition of the pipes,I just wonder if there is any simple way to do the estimation.

Any concerns are appreciated!

Based on experieces...

Somebody told me the pipe supports will cover 9-12% of the cost of pipes.I don't know where it derives from.Maybe experience......
Any suggestion?