Yellow CSST

[rc/retired]

Let us know what you find out. As a builder, I’m interested.

I talked to a firefighter today. Not my friend, but close enough.
They are aware of the scrawny gang plates on newer trusses as Don alluded to.
They have not experienced truss failures as yet. However, they do expect that to happen as the lumber dries out.
He did reiterate the failures of I-joists. And mentioned how a fire on top of the joist caused a floor failure.
Probably more to come.

Ron

 

[don_resqcapt19]

Not even microlaminated beams?

I can't imagine an need for such a beam in any house I would build, and there have been reports of the glue releasing under high temperature conditions in microlaminated beams.

 

[jimport]

Wow. In my area, sprinklers are required for attached homes. The fire authority wants them in single family dwellings. So far they're not successful.

I haven't heard of any catastrophic truss failures due to the gang plates. I will ask a firefighter I know.
That is interesting, though.

Due to the small depth of penetration into the wood the gang nails will fail quickly under fire conditions and the structural integrity is lost causing collapse.

 

[Eddie702]

The appliance end is, which is why nearby lightning strikes can drive current through the CSST by energizing the meter end.

Bonding the latter to the service EGC/grounding bus effectively bonds both ends of the CSST, eliminating that current.

Makes sense got it.

 

[garbo]

As briefly as possible, (for me, you may reply to any degree/length you see fit ) based on the 2021 NFPA 54 (National fuel gas code) and the NEC 2017.

In your opinion, is it code compliant/non-code compliant to bond a gas line (propane or natural) by way of an approved pipe clamp in series (one continuous wire sized for 250.66 based on the largest service entrance conductor) to the GEC ( Grounding Electrode Conductor) on the way to the Grounding electrode?

As stated previously, I found a 'FACT SHEET'; rev.9-06-17 from the AGA (American gas Association), that seems to require… "A direct bond consists of the listed grounding clamp and separate conductor run from the gas piping to the grounding electrode system. Options include: electrical service enclosure, or grounded conductor at electrical service, or grounding electrode conductor, or any installed grounding electrode."

I can find no such requirement for a 'separate conductor' in the National fuel gas code mentioned. Section 7.12 through 7.12.5 Nor 'Annex A' of same, although A.7.12.5 in the Annex seemingly directly contradicts NEC 2017 250.52 (8) (B) not permitted for use as grounding electrodes, ( 3) metal underground gas piping systems. the Annex item specifically names underground in reference to lightning protection systems… Maybe the additional hundred dollars I just spent to have access to NFPA LINK in addition to the annual $175 NFPA dues will provide some answers… After I figure out how to work it.

Any insights or opinions would be greatly appreciated.

Thank you, Willy

Was told at a IAEI class a few years ago that every manufacturer of CSST have their own way of grounding it. Does not make any sense in this day & age. A freind asked me to bond the CSST to a fireplace. The local gas company said to run a wire from copper water service to steel gas pipe near where they enteted the house. I thought it was dangerous how the plumber ran the CSST on baseboard maybe a inch off the wall to wall carpet. Seems like a vacuum cleaner over time banging into the tubing would damage it. Thought regular schedule 40 steel pipe would be a lot safer.