Are flexible couplings required at riser for vertical support?
My project has a vertical support for a 30-ft long 6-inch riser.
I used a riser clamp with two wall-mounted welded brackets to provide vertical load hanger at about 20-ft AFF.
The inspector commented that I have to provide a flexible coupling above and below within 24" of the point of attachment. His reasoning is: 22.214.171.124(6) NFPA 13 2022 edition (6) Within 24 in. above and 24 in below any intermediate points of support for a riser or other vertical pipe.
Anyone has suggestion for better way to put a vertical support at the riser?
Is one ATR hanger at the top of the riser sufficient?
Thanks in advance.
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