When i design the IG541 gas extinguishing system, there is no specific requirements about how to design the hanger and support? Now, for me there are two choice below, i don't konw how to deal with this issue:
1. Using the L steel and Channel steel to fabricate the hanger and support on project site, welding them on the structure or column in the buildding.
2. Purchase the finished hanger and support just like the NFPA13 mentioned using the bolts when installation.
By contrast, the costs of the first method will be much more cheaper than the second one, but I afraid the first one can be meet the requirements of the NFPA 2001 or not ? Pls see the below picture about the first method for reference, thanks a lot!