Eaton B-Line Square Post Base ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$56,536.79
$111.10
B-Line Eaton series strut fittings and accessories, 3.5" Height, 6" Length, 6" Width, 3.92lbs, Steel, Square post base, centered, Fits channel B22, St

Eaton B-Line Square Post Base Centered 3.5 Inch Height 6 Inch Length Steel Stainless Steel 304 Finish B22 Channel

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Model: B280SQSS4
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$56,536.79
$111.10
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Eaton B-Line Square Post Base Centered

Professional Strut Channel Support System Base

The Eaton B-Line Square Post Base Centered delivers exceptional structural support and installation efficiency for vertical strut channel mounting applications. This steel construction post base with stainless steel type 304 finish provides reliable structural support designed for professional electricians, mechanical contractors, and facility installers, offering the proven strength and versatile mounting capabilities that professionals trust from the industry leader in strut channel systems.

Professional Features & Benefits

Structural Performance

  • Steel Construction with Stainless Steel 304 Finish - Superior corrosion resistance and structural integrity for long-term performance in demanding environments
  • 3.5 Inch Height Design - Optimal vertical clearance for proper strut channel positioning and load distribution
  • 6 Inch Length and Width Dimensions - Substantial base footprint providing stable foundation for vertical support applications
  • 3.92 Pound Weight Rating - Robust construction ensuring reliable structural performance under operational loads

Installation Efficiency

  • Centered Square Design - Precise alignment capabilities for accurate strut channel positioning and professional installation results
  • B22 Channel Compatibility - Engineered specifically for seamless integration with B-Line B22 strut channel systems
  • Professional Base Mounting - Streamlined installation process reducing labor time and ensuring proper structural connections

Durability & Protection

  • Stainless Steel Type 304 Finish - Premium corrosion protection for indoor and outdoor structural applications
  • Steel Core Construction - Maximum structural strength and load-bearing capacity for professional support systems

Technical Specifications

Height: 3.5 inches, Length: 6 inches, Width: 6 inches, Weight: 3.92 pounds, Material: Steel construction, Finish: Stainless steel type 304, Design: Square post base centered configuration, Channel Compatibility: Fits B22 channel systems, Type: Square post base centered mounting system

Installation & Usage

  1. Position the square post base at the designated mounting location ensuring level placement and proper alignment
  2. Secure the base to the mounting surface using appropriate fasteners for the substrate material and load requirements
  3. Insert the B22 strut channel into the centered square post base ensuring proper engagement and alignment
  4. Verify the vertical positioning and structural stability of the mounted strut channel system
  5. Complete the installation by connecting additional strut components and support hardware as required
  6. Perform final inspection to confirm all connections are secure and the system meets structural requirements

Professional Applications

Ideal for:

  • Electrical Conduit Support Systems - Vertical strut mounting for electrical raceway and conduit support structures
  • Mechanical Equipment Mounting - Base support for HVAC equipment, pumps, and mechanical system installations
  • Industrial Support Structures - Foundation mounting for manufacturing equipment and process system supports
  • Commercial Building Systems - Structural support for lighting, signage, and building system installations
  • Facility Infrastructure - Base mounting for utility systems, cable management, and equipment rack installations
  • Seismic Bracing Applications - Structural foundation support for earthquake-resistant building system installations
  • Equipment Rack Systems - Base support for telecommunications, data center, and electronic equipment mounting
  • Structural Framing Projects - Foundation support for custom structural frameworks and support system installations

Stainless Steel Type 304 Advantage

The stainless steel type 304 finish provides exceptional corrosion resistance and durability for both indoor and outdoor structural applications. This premium finish ensures long-term performance in challenging environments including high humidity, chemical exposure, and temperature variations, making it ideal for food processing facilities, pharmaceutical installations, coastal environments, and other demanding applications where corrosion protection is critical.

Why Choose B-Line Quality?

B-Line's decades of structural support innovation and engineering excellence ensure this square post base delivers the reliability and performance that professional contractors, electricians, and facility managers demand. With industry-leading load-rated safety standards, structural integrity compliance, and compatibility with the complete B-Line strut channel ecosystem, this post base represents the trusted quality and dependable structural performance that has made B-Line the preferred choice for commercial, industrial, and institutional support system installations worldwide.

Manufacturer Resources

Product Specs

Certifications:
Not Applicable
For Channel Type:
Fits channel B22
Product Height:
3.5 in
Product Length Depth:
6 in
Product Weight:
3.92 lb
Product Width:
6 in
Department:
Electrical
Product Type:
Square post base, centered
Product Finish:
Stainless steel type 304
Product Details:
Square post base, centered
Product Material:
Steel

B-LINE B280SQSS4 – Frequently Asked Questions

1) Will the B-Line B280SQSS4 post base fit B22 strut channel?
Yes. The B280SQSS4 square post base is made for B22 channel, which is B-Line's 1-5/8 inch wide, 1-5/8 inch deep double-height channel. The channel seats in the centered square socket on the base. If your vertical run is single-height 1-5/8 x 13/16 channel, this is not the base for it.
2) What is the footprint of the B-Line B280SQSS4 square post base for laying out anchor bolts?
The base measures 6 inches by 6 inches with a 3.5 inch height, so plan on a 6 x 6 inch bearing area at each post location. Weight is 3.92 lb. The channel socket is centered on that square, which means the post lands on the middle of your anchor pattern rather than offset to one edge.
3) Is a type 304 stainless post base OK for a wet or washdown area?
Type 304 stainless is the standard choice for food processing, pharmaceutical, and general washdown or high humidity work, and it holds up outdoors. Where it gets tested is chloride exposure, direct coastal salt spray or pool chemistry, where 316 is the usual step up. The B280SQSS4 carries a stainless steel type 304 finish over steel construction.
4) Does the B280SQSS4 post base come with anchors or bolts to fasten it down?
No fasteners ship with it. The base is the fitting only, so you supply the anchors sized to your substrate, wedge or sleeve anchors into concrete, through-bolts on steel, and you supply the hardware that ties the B22 channel into the socket. In stainless work, match the anchor material to the base or you give up the corrosion resistance you paid for at the one point that matters.
5) What is the difference between a centered square post base and an offset or flat plate strut base?
A centered base puts the channel in the middle of the plate, so load runs straight down the post into the anchor pattern and the post can take side load from any direction evenly. That is what you want for a freestanding vertical, equipment stands, or a seismic-braced leg. An offset base sets the channel to one side, which is how you get a post tight against a wall or curb. A flat plate with a channel welded on gives you less socket depth than the 3.5 inch height here. The B280SQSS4 is the centered version.
6) What is the Eaton B-Line part number for the 6 inch square stainless post base?
B280SQSS4 is the Eaton B-Line catalog number. The SS4 suffix is the type 304 stainless finish, and the B280SQ is the 6 x 6 inch centered square post base for B22 channel. If you are ordering plain or electrogalvanized instead, the SS4 is the part of the number that changes.
7) Does the B-Line B280SQSS4 post base carry a UL listing or seismic certification?
The B280SQSS4 is a mechanical strut fitting supplied without a certification listing attached to it. On seismic or structural work the load path gets approved as an assembly by the engineer of record, based on the anchor, the channel, and the bracing, not on a listing for the base by itself. Bring the 6 x 6 inch footprint and the 304 stainless material to that review.
8) Can I use this square post base to stand up conduit racks or a rooftop equipment support?
That is the job it does. A B22 post dropped into the centered socket gives you a freestanding vertical for conduit racking, trapeze uprights, HVAC and pump stands, sign and light poles, or equipment rack legs. The 304 stainless finish is what makes it a candidate for rooftop and other outdoor exposure rather than an indoor-only fitting. Anchoring the 6 x 6 inch plate to the deck or a curb is what sets the capacity, so that detail belongs to your structural design.
How fast can I get the B-LINE B280SQSS4 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 B280SQSS4 come with a warranty?
Absolutely. The B-LINE B280SQSS4 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 B280SQSS4?
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 B280SQSS4 from ZenSupply?
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