B-Line Eaton series runway splice, Runway horizontal reducing and 90° junction butt splice kit, ASTM A570 structural steel, Black zinc finish

The B-Line SB2102B2BZ is a butt splice kit for joining runway sections where the run changes width or turns. It handles two jobs: a horizontal reducing splice, where a wider runway section butts into a narrower one, and a 90 degree junction, where one runway ties into the side of another. It is the connecting hardware between runway sections, not a runway section itself.

No. One SB2102B2BZ kit covers both conditions, it is specified as a horizontal reducing and 90 degree junction butt splice. That keeps the parts list short on a job where a main run steps down in width and also feeds a branch runway off the side.

Yes, the SB2102B2BZ splice kit is UL Listed, which is normally what a spec on a telecom or data center runway installation calls for on the splice hardware as well as the runway itself.

The kit is formed from ASTM A570 structural steel with a black zinc finish. A570 is a hot rolled carbon structural steel, so the plates carry load rather than acting as trim. Black zinc is a plated finish suited to dry indoor equipment rooms and matches black runway, it is not a finish intended for exterior or wet exposure.

The kit measures 5 in by 2.1875 in by 2 in and weighs 1.4 lb. Those figures cover the kit as supplied, so use them to check clearance where the runway butts a wall, ladder rack upright, or adjacent tray before you commit to the junction location.

No. It is a horizontal splice, used for a reducing joint or a 90 degree junction in the same plane. A runway that steps up or down in elevation needs a vertical or radius transition fitting instead, not this butt splice kit.

Order it as B-Line (Eaton) part number SB2102B2BZ. The trailing BZ in that number is the black zinc finish, so a specifier matching an existing black runway system should hold that suffix.