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Manufacturer Resources
Product Specs
- Application:
- Used to connect runway stringers
- Certifications:
- UL Listed
- Material Details:
- Black zinc ASTM A570 steel
- Product Height:
- 2 in
- Product Length Depth:
- 4 in
- Product Weight:
- 1 lb
- Product Width:
- .62 in
- Department:
- Electrical
- Product Group:
- Clamps & Supports
- Product Subgroup:
- Clamps
- Product Type:
- Pair of splice clamps
- Product Details:
- Pair of splice clamps
B-LINE SB21352BZ – Frequently Asked Questions
1) What does the B-Line SB21352BZ runway splice actually do in a cable runway installation?
It joins two runway stringers end to end. The SB21352BZ ships as a pair of splice clamps, one for each side of the joint, so a single order covers one complete stringer-to-stringer connection. For a run made of multiple straight sections, you need one pair per splice point, not one pair per run.
2) Is the B-Line SB21352BZ splice UL Listed for use in a data center or telecom room?
UL Listed, yes. That matters on cable runway because the runway is often used as an equipment grounding path, and inspectors on telecom and data center jobs look for listed components at the splice points rather than field-fabricated plates.
3) Do I get one clamp or two when I order SB21352BZ?
Two. SB21352BZ is sold as a pair of splice clamps, which is the quantity needed for one stringer joint. Count your splice locations and order that many units, rather than doubling up.
4) What is the B-Line runway splice clamp made of, and will the finish hold up in an unconditioned room?
The clamps are ASTM A570 structural steel with a black zinc finish. That is a plated steel part intended for dry interior use, such as telecom rooms, equipment rooms, and electrical spaces. For outdoor, wet, or corrosive locations you want a hot-dip galvanized or stainless runway splice instead.
5) How big is each B-Line SB21352BZ splice clamp?
Each clamp measures 4 x 2 x .62 inches, with the pair weighing 1 lb total. The .62 inch dimension is what tells you whether it clears the adjacent hardware on the stringer, so check it against any butt splice kits or grounding lugs landing near the same joint.
6) Is the black finish on the B-Line splice a match for black cable runway?
The clamps come in black zinc, so they blend with black-finish runway stringers rather than standing out the way a bright zinc part would. That is the usual reason a black zinc splice gets specified over a plain plated one on visible overhead runway in a data hall.
How fast can I get the B-LINE SB21352BZ delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the B-LINE SB21352BZ come with a warranty?
Absolutely. The B-LINE SB21352BZ is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the B-LINE SB21352BZ?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the B-LINE SB21352BZ from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.