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What gauge of steel do we use in the Subway system?

Underfloor duct is made of two pieces - an upper part and a lower part.
On devices that begin with DM, the top piece is 14 ga and the bottom is 18 ga.
On devices that begin with DL, both pieces are 18 ga.
All of these devices have been tested and approved by UL.
Our Subway, Underfloor Duct System is obsolete. No replacements available.

CTA-ID : 2051576
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