B-Line Eaton series runway splice, Runway horizontal reducing butt splice kit, Material ASTM A570 structural steel, Black zinc

The SB2102ABZ is a horizontal reducing butt splice kit for Eaton B-Line cable runway. It joins two runway sections end to end in the same horizontal plane where the two runs are different sizes, so the splice reduces from the larger stringer to the smaller one at the joint. It is a kit, so the splice plates and the fasteners to make that connection come together under the one part number.

No. A horizontal reducing butt splice joins two runs in line, in the same horizontal plane, where the section sizes differ. For a turn, a drop, or a change in elevation you need the matching elbow, offset, or vertical splice component from the same runway family, not this kit. Use the SB2102ABZ only for the straight in-line joint between two different size runway sections.

It comes down to whether the two sections are the same size. If both runway sections are identical stringer size, a standard butt splice is what you want. The reducing splice, part SB2102ABZ, is for the joint where the runway steps down from a larger size to a smaller one, which is common where a main cable highway leaves a data room and continues at a narrower width over the racks.

Construction is ASTM A570 structural steel with a black zinc finish. A570 is a hot-rolled structural quality sheet steel, so the splice carries load rather than just aligning the joint. Black zinc is a plated finish intended for dry indoor use, matching black runway in equipment and telecom rooms. For outdoor, damp, or corrosive locations you want a hot-dip galvanized or stainless splice instead.

Published dimensions are 5 in, 2.1875 in, and 1.5 in, with a shipped weight of 1.1 lb. The 1.5 in figure is the height, which is the dimension to check against your runway stringer depth, and the 5 in length is how far the splice spans across the joint. The light weight means one tech can set it overhead without a second pair of hands.

It ships as a kit under the single part number SB2102ABZ, so the splice components for the joint come together rather than being ordered piece by piece. Only one configuration is offered, black zinc, so there is no finish or size selection to make when you order.

The finish is black zinc, which is the standard black runway finish used across Eaton B-Line cable runway, so it reads consistent against black stringers already in place. If your existing runway is gray or galvanized, this splice will be visibly different and you should source the matching finish for that system instead.