There is a confusing discrepancy between NFPA 13's ban on hanging 1.25" and greater pipe to bare metal deck versus the availability of UL listed anchors with a test load of 850 lb (that is the number for the 3/8" Sammy XP 20).
I don't understand how something that has passed such rigorous testing could be forbidden by the code. Does anybody have any background knowledge on this subject?
On top of this, I don't understand the configuration required for this application by NFPA 13. It says anchorage needs to be provided by "punching the vertical portion of the metal deck and using through bolts." (2016 Ed. 18.104.22.168.1) I don't know how to visualize this arrangement and there are no details or photos in the handbook.
Does anyone know what this is supposed to look like?
I've tried reaching out to NFPA's technical resources and have not gotten a response.
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