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Topaz Lighting 126 Steel I-Beam C Clamp, 3/8"-16 Thread, 3/4" Jaw Opening
The Topaz Lighting 126 is a professional-grade steel I-beam C clamp engineered to provide secure, dependable mounting points for electrical and lighting installations on structural I-beam members. This C clamp is offered in more than one size configuration, including the 126 and 1007 models, so installers can match the clamp to their I-beam flange and hardware needs. The 126 configuration features standard 3/8"-16 threading and a 3/4" jaw opening, accommodating a range of I-beam flange thicknesses while integrating with common mounting hardware on commercial and industrial job sites. Built from durable steel, the Topaz Lighting C clamp family is engineered to withstand professional electrical and lighting installation work, giving electricians and contractors a reliable structural attachment solution.
Key Features
- 3/4" Jaw Opening: On the 126 configuration, the 3/4" jaw opening accommodates a range of I-beam flange thicknesses for versatile mounting across common structural steel profiles.
- Durable Steel Construction: Manufactured from steel for superior strength and longevity, built to handle demanding commercial and industrial installation environments.
- 3/8"-16 Threading: Standard 3/8"-16 thread pattern on the 126 configuration ensures broad compatibility with common mounting hardware and fasteners.
- I-Beam Specific Design: Engineered for secure attachment to structural I-beam components, ensuring a stable mounting platform for electrical equipment and lighting fixtures.
- C Clamp Configuration: The C clamp profile delivers reliable clamping action with straightforward installation and adjustment, minimizing job-site install time.
- Threaded Connection: The threaded connection allows quick, secure attachment of conduit, raceway, and support hardware directly to the I-beam mounting point.
- Multiple Size Options: Also available as model 1007, so contractors can select the clamp size that fits their I-beam and hardware requirements.
Technical Specifications
- Pack Size: 100
- PDF:Spec Sheet: https://zensupply.com/content/pdf/topaz-lighting/spec-sheet-36170e.pdf
- PDF:Topaz Electrical Fittings & Supplies Catalog: https://zensupply.com/content/pdf/topaz-lighting/topaz-electrical-fittings-supplies-catalog.pdf
Typical Applications
- Electrical Equipment Mounting on Structural I-Beams
- Lighting Fixture Installation in Commercial and Industrial Facilities
- Industrial Facility Structural Mounting Systems
- Commercial Building Electrical and Lighting Installations
- Structural Support and Raceway Attachment Systems
- Professional Electrical Contractor Installations
Why Topaz Lighting?
Topaz Lighting steel I-beam C clamps are built to professional standards, combining durable steel construction with precision threading and jaw openings, including the 126 model's 3/8"-16 thread and 3/4" jaw opening. The Topaz Lighting C clamp family is a trusted choice for electrical contractors who need reliable structural mounting hardware suited to commercial and industrial applications.
Manufacturer Resources
Spec Sheet
Product Specs
- Product Type:
- C Clamp
- Connection Type:
- Threaded
- Department:
- Electrical
- Product Group:
- Conduit & Raceway
- Product Subgroup:
- Conduit Straps & Supports
- Product Material:
- Steel
- Pack size (unit):
- 100
Topaz Lighting 126 – Frequently Asked Questions
1) What size rod does the Topaz 126 I-beam C clamp accept for hanging conduit or a light fixture?
The Topaz 126 is tapped 3/8"-16, which is the standard all-thread rod size on commercial conduit and fixture hangers. Run 3/8" threaded rod straight into the clamp body, or thread in a 3/8" eye bolt or hanger stud. If your job is already hung on 1/4"-20 rod, this clamp is the wrong tap and you need a 1/4"-20 beam clamp instead.
2) How thick a beam flange will the Topaz 126 C clamp fit over?
The jaw opens 3/4 inch, so it goes over any flange edge up to 3/4 inch thick. That covers the great majority of bar joist and I-beam flanges in commercial construction, and it also lets the clamp sit on an angle iron or a channel lip. Measure the flange at the point you plan to clamp, not at the web, since flanges taper on some rolled shapes.
3) Can I hang EMT conduit directly from a Topaz 126 beam clamp?
Not directly. The 126 gives you a 3/8"-16 threaded attachment point on the beam, and the conduit hangs off what you thread into it: a length of 3/8" all-thread down to a conduit hanger or a strut trapeze, or a 3/8" rod-mount conduit hanger screwed straight to the clamp. Budget those pieces separately, because the clamp is the anchor only.
4) Will a Topaz 126 C clamp work on a bar joist or only on a wide-flange I-beam?
It is built for structural I-beam flanges, and the 3/4 inch jaw is the thing that decides the rest. Any edge that measures 3/4 inch or less and gives the jaw a flat face to seat on will take the clamp, including a joist bottom chord angle. Where the chord is a doubled angle thicker than 3/4 inch, or where the steel is round bar with no flat, this clamp is not the right attachment.
5) Is the Topaz 126 beam clamp steel or a cast part?
Steel. That matters on a beam clamp because a dropped or overtightened cast body can crack, and steel gives you a hanger that takes the bite of the set screw on a painted or primed flange without shattering. Bare steel will want a coated environment indoors; it is not a stainless part.
6) Do Topaz beam clamps come individually or do I have to buy a box?
They ship 100 to a pack. For an electrician hanging a lighting grid or a conduit run across a warehouse bay, that is usually the right unit anyway, since a single run can eat several dozen clamps. Plan the count off your hanger spacing before ordering rather than by the fixture count.
7) What is the difference between the Topaz 126 and the Topaz 1007 beam clamp?
They are two sizes of the same steel C clamp family. The 126 is the 3/8"-16 tapped version with the 3/4 inch jaw. The 1007 is the other size offered, for a different combination of flange thickness and hardware. Order by the tap your rod uses first, then confirm the jaw clears your flange.
8) Should I use a C clamp or a strut beam clamp to support conduit off structural steel?
A C clamp like the Topaz 126 is the fast answer for a single point load, one rod, one fixture or one conduit hanger per beam. It clamps on the flange edge and is threaded for 3/8" rod, so a crew can set a whole lighting grid without drilling anything. Go to a strut-style beam clamp instead when you are landing a channel trapeze carrying multiple conduits, where the load wants to be spread over a piece of strut rather than one point.
How fast can I get the Topaz Lighting 126 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 Topaz Lighting 126 come with a warranty?
Absolutely. The Topaz Lighting 126 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 Topaz Lighting 126?
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 Topaz Lighting 126 from ZenSupply?
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and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.