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Eaton B-Line series 4Dimension strut channel
Manufacturer Resources
Product Specs
- Certifications:
- Not Applicable
- Channel Type:
- 4D21
- Hole Pattern:
- SH
- Material Gauge:
- 18 Gauge
- Product Height:
- 1.06 IN
- Product Length Depth:
- 240 IN
- Product Weight:
- 20.64 LB
- Product Width:
- 2.12 IN
- Department:
- Electrical
- Product Finish:
- Hot-dipped galvanized
- Product Material:
- Steel
B-LINE 4D21SH-240HDG – Frequently Asked Questions
1) Is hot-dipped galvanized strut channel OK for outdoor or wet locations?
Hot-dipped galvanized is the finish B-Line applies to this 4D21 channel, and it is the heavier-duty corrosion coating used for exterior runs, rooftops, parking structures, and damp mechanical spaces. For dry interior work, pre-galvanized (electro-galvanized) channel is the usual lower-cost choice; specify HDG when the steel will see weather or washdown.
2) Is 18 gauge strut channel heavy enough for conduit racks and pipe supports?
This 4D21 channel is 18 gauge steel, which is the lighter of the common strut gauges. It handles branch conduit racks, cable tray drops, small pipe, and equipment mounting well. For long unsupported spans or heavy mechanical loads, step up to a 12 or 14 gauge channel or a back-to-back double section instead of adding hangers to 18 gauge.
3) Will standard strut nuts and fittings fit the B-Line 4D21 channel profile?
The 4D21 section is 2.12 inches wide by 1.06 inches high, so it is a shallow half-height profile rather than a full 1-5/8 inch deep channel. Use fittings, spring nuts, and clamps sized for the shallow B-Line 4D21 opening; deep-channel hardware intended for 1-5/8 by 1-5/8 strut will not seat correctly.
4) What does the SH in 4D21SH mean on B-Line strut channel?
SH is the hole pattern designation, meaning the channel is slotted on the back. That gives you mounting points along the length without field drilling, which matters when you are lagging the run to a deck or wall. If you need a solid back with no holes, that is a different suffix in the 4D21 family.
5) Does the B-Line 4D21SH-240HDG come with nuts, bolts, or mounting hardware?
No. The 4D21SH-240HDG is a bare 240 inch length of channel only. Spring nuts, hardware, end caps, splice plates, and brackets are ordered separately, so build them into your takeoff before the crew is on site.
6) What is the exact part number to order this B-Line 20 foot galvanized strut channel?
Order Eaton B-Line part number 4D21SH-240HDG. Read the code as 4D21 channel type, SH slotted hole pattern, 240 inch length, HDG for hot-dipped galvanized. That is the single configuration, so there is no finish or length option to select.
7) Can I cut this 20 foot strut channel to length in the field?
Yes, strut is routinely cut on site with a bandsaw or abrasive chop saw. Keep in mind the hot-dipped galvanized coating is removed at the cut, so exposed ends in a wet or exterior location should get a cold galvanizing touch-up to keep rust off the raw steel edge.
How fast can I get the B-LINE 4D21SH-240HDG 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 4D21SH-240HDG come with a warranty?
Absolutely. The B-LINE 4D21SH-240HDG 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 4D21SH-240HDG?
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