C Style Beam Clamps: Hanger Clamps vs. Structural Clamps
Quick Answer: Two very different products share the name “C style beam clamp.” The first is a small set-screw hanger clamp used to hang threaded rod for pipe, conduit, and HVAC supports. The second is a structural C clamp, like the BeamClamp® Type BL from LNA Solutions, used to clamp steel sections directly together with tested, published load values. If you are hanging rod for building services, you need the first. If you are making a steel-to-steel connection or suspending real loads from structural steel, you need the second. This guide explains the difference so you specify the right one.
Already know you need the structural version? View the C Style BeamClamp® (Type BL) or send your connection details to an engineer for a free recommendation and quote.
Why Does “C Style Beam Clamp” Mean Two Different Things?
Both products are shaped like the letter C, and both grip a beam flange. The similarity ends there.
The set-screw hanger version comes from the electrical and mechanical trades. It is a small malleable or ductile iron casting that tightens onto a flange with a cup-pointed set screw, with a tapped hole for threaded rod. It exists to hang pipe runs, conduit, cable tray, and ductwork. Load ratings are modest, and the products are sold by size of rod, not by structural capacity.
The structural version is a tested steel-to-steel connection component. It clamps two steel sections directly together, or suspends load-rated hardware from a flange, with published tensile and lateral load values derived from physical testing. That is a different job, a different duty level, and a different specification conversation.
The problem: search for “C style beam clamp” and both products appear side by side. Specify the wrong one and you either overpay for a rod hanger or, far worse, hang a structural load from a services clamp.
Set-Screw Hanger Clamps vs. Structural C Clamps
| Factor | Set-Screw Hanger C Clamp | Structural C Clamp (BeamClamp® Type BL) |
|---|---|---|
| Primary job | Hanging threaded rod for pipe, conduit, HVAC | Clamping steel sections directly together; load-rated suspension |
| How it grips | Cup-pointed set screw against the flange | Clamping jaw tightened by a central bolt |
| Load basis | Rated by rod size, services duty | Published tensile and lateral loads from physical testing, 3 to 1 factor of safety |
| Typical loads | Light services loads | Up to 7,718 lbs tensile at the nose per pair (1″ bolt size) |
| Finish | Varies by supplier | Hot-dip galvanized to BS EN ISO 1461 |
| Installation | Set screw, jam nut | Single wrench installation |
| Where to buy | Electrical and mechanical suppliers | Direct from LNA Solutions, Buffalo, NY |
If your job is on the left column, any reputable electrical supplier will sort you out, and that is the honest answer. Everything below is for the right column.
What Is the C Style BeamClamp® (Type BL)?
The BeamClamp® Type BL is a structural C clamp used for clamping steel directly together without a location plate. Typical applications include clamping parallel steel sections and pressure vessel lids. It is tested for tensile and lateral loads and installs with a single wrench.
Key specifications:
- Six bolt sizes: 5/16″, 3/8″, 1/2″, 5/8″, 3/4″, and 1″
- Extensive clamping range: from 3/16″ minimum at the smallest size up to 3-3/4″ maximum at the largest
- Finish: hot-dip galvanized to BS EN ISO 1461
- Load basis: published tensile and lateral values with a 3 to 1 factor of safety applied
- Capacity: tensile load at the nose ranges from 1,664 lbs per pair (5/16″ bolt) up to 7,718 lbs per pair (1″ bolt)
- Accommodates clips and brackets within the clamping jaw
Can a Structural C Clamp Hang Threaded Rod?
Yes, and this is where the two product categories overlap. The Type BL’s central bolt can be replaced with threaded rod, eyebolts, or J-bolts for suspension applications. Published tensile loads in line with the rod range from 225 lbs (5/16″ bolt size) up to 2,360 lbs (1″ bolt size).
That makes the Type BL the right call when a rod-hung load exceeds what a services hanger clamp should carry, or when the connection needs documented, tested load values for the project record. If an engineer has to sign off on what the rod is hanging from, a set-screw clamp with no published structural data is the wrong answer.
When Should You Specify the Type BL?
- Clamping parallel steel sections together without drilling or welding either one
- Pressure vessel lids and covers that need removable, evenly clamped connections
- Load-rated suspension from a beam flange using threaded rod, eyebolts, or J-bolts
- Connections needing documentation: tested loads, a stated factor of safety, and a specified finish standard
- Hot work restrictions: like all BeamClamp® products, the Type BL makes the connection with no on-site welding or drilling
For an overview of how clamp connections compare across the full range, see our guides on the top 5 beam clamp types and how BeamClamps work. For capacity questions across the product line, start with how much weight a beam clamp can hold.
Not sure which column your job falls in? Send us the load, the flange, and what you are attaching. Our engineers will tell you straight, with free PE sign-off within 24 hours, even if the answer is that a services hanger will do.
Frequently Asked Questions About C Style Beam Clamps
What is a C style beam clamp used for?
It depends which product you mean. Set-screw C clamps hang threaded rod for pipe, conduit, and HVAC services. Structural C clamps like the BeamClamp® Type BL clamp steel sections directly together or suspend load-rated hardware from a beam flange, with published tensile and lateral load values.
How much weight can a C style beam clamp hold?
The BeamClamp® Type BL publishes tensile loads at the nose from 1,664 lbs per pair at the 5/16″ bolt size up to 7,718 lbs per pair at the 1″ bolt size, with a 3 to 1 factor of safety applied. Set-screw hanger clamps carry far less and are rated for services duty, not structural loads.
Can I use a set-screw beam clamp for a structural load?
No. Set-screw hanger clamps are services components without published structural load data. Structural loads and any connection an engineer must sign off on should use a tested clamp with documented capacities and a stated factor of safety.
Does the Type BL need drilling or welding?
No. Like all BeamClamp® products, the Type BL installs with basic tools, a single wrench in this case, and makes the connection without on-site drilling or welding.
What finish does the Type BL come in?
Hot-dip galvanized to BS EN ISO 1461.
Where can I buy structural C style beam clamps in the United States?
LNA Solutions manufactures the BeamClamp® Type BL and ships direct from Buffalo, NY across North America, with free engineering support and PE sign-off within 24 hours on every inquiry.
Get a Recommendation and Quote
Tell us the sections you are connecting or the load you are suspending, and we will confirm the right Type BL size, or point you to a better-suited product if there is one.
Request a Quote View the Type BL
Last reviewed: August 14, 2026
