B-Line Eaton series runway tubular, 119" height, 119" length, 9" width, ASTM A513 grade, Steel, 1008 steel, 11 gauge, Tubular stringer, Yellow zinc

The Eaton B-Line SB17T09YZ tubular stringer is one of the two side rails that form a cable runway in communication pathways. Stringers run the length of the pathway and the cross members tie between them to create the ladder. You order stringers in pairs for any given run, plus the cross members, splice kits and wall or ceiling supports to complete the pathway.

Yes, the B-Line tubular stringer is UL Classified. That matters on telecom and data center jobs where the runway is used as an equipment grounding path or has to appear on an inspected drawing.

No. This is a single 119 inch tubular stringer only. A complete runway needs two stringers per run, cross members at your chosen spacing, a splice kit at each stringer joint, and wall angle, ceiling kits or triangular supports to hang it. Order those separately.

Steel, specifically 1008 low carbon steel manufactured to ASTM A513 tubing, finished in yellow zinc. A513 is the standard for welded carbon steel mechanical tubing, which is what gives the tubular stringer its closed box section rather than the open channel of a formed stringer.

Yellow zinc is a plated finish intended for dry indoor use, which is where communication pathway runway normally lives. For exterior, wash-down or corrosive rooms, specify a hot dip galvanized or stainless runway stringer instead of the yellow zinc version.

A tubular stringer is a closed steel box section, made here from ASTM A513 mechanical tubing. A channel stringer is an open C shape. The tubular profile is chosen where a finished, uniform look is wanted in an exposed data room and where you want no open channel collecting dust. Channel stringers are the more common general purpose choice. Both carry cable the same way; the mounting hardware differs, so match your splice kits and supports to the stringer type you pick.

The model to specify is SB17T09YZ. In the B-Line runway numbering, the 09 identifies the 9 inch size and YZ identifies the yellow zinc finish. Give that part number to your distributor rather than describing the piece, since stringer, cross member and support part numbers all look similar within the series.