B-Line Eaton series runway splice, Used to connect runway stringers, Cable runway butt-splice clamp and kit, structural steel, Black zinc

The SB166BBZ is a butt-splice clamp kit for joining two cable runway stringers end to end, so a continuous ladder run can be built from multiple sections. It bridges the two stringer ends rather than supporting the runway itself, so you still need your wall, rack, or ceiling supports at the specified intervals.

Yes, the SB166BBZ splice kit is UL Listed, which is what most telecom and data center specs call for on runway hardware. That listing is the only rating carried on the part.

Order by the part number, SB166BBZ, which is the black zinc Eaton B-Line splice, and match it to black B-Line cable runway of the same stringer depth. Splice kits are sized to the stringer channel they clamp onto, so confirm the stringer depth of your existing run before ordering. If your runway is a different finish, the plated or painted version of the splice is the one to get for a consistent look.

It is structural steel, specifically ASTM A570, with a black zinc finish. That combination is intended for dry indoor use such as equipment rooms and data centers, and the black finish matches black runway rather than plated or aluminum sections. For wet, corrosive, or outdoor exposure you want a hot-dip galvanized or stainless splice instead.

It ships as a clamp and kit, so the splice hardware is included in the package. What is not included is anything for hanging or supporting the runway itself, such as wall angle, threaded rod, or ceiling kits. Order those separately.

No. A butt splice joins two stringers in a straight line only. Direction changes, tees, and elevation transitions need the dedicated junction, corner, or radius fittings for the runway system, not the SB166BBZ.