Everything You Need to Know About I Beam Clamps

Looking for a secure way to connect steel sections without torching holes or striking an arc? I beam clamps offer a no-drill, no-weld solution that saves time and avoids hot work permits. These clamps grip directly onto flanges, making them ideal for field installs, structural upgrades, or temporary rigging. Let’s break it all down.

Table of Contents

• What are I beam clamps?
• How do I beam clamps work?
• Why use I beam clamps instead of welding or drilling?
• Types of I beam clamps and when to use each
• Installation tips for better safety and speed
• Real use cases: Where I beam clamps shine
• FAQs

What are I beam clamps?

I beam clamps are steel fasteners that attach directly to structural steel without drilling through it. They’re shaped to grip the flanges of I-beams or S-beams, holding support brackets, conduit, steel plate, rigging points, and more. Most models use basic hand tools, and some even self-adjust to fit various flange sizes.

How do I beam clamps work?

Most I beam clamps tighten onto the flange using a threaded bolt or setscrew system. When tightened, the clamp creates high friction or mechanical interlock with the beam surface. This load-bearing connection can support vertical loads (tension) or horizontal loads (shear), depending on the application. These types of bolted joints are often referenced in slip-critical connection guidelines from AISC and require specific torque values to ensure performance.

• Hot-dip galvanized or stainless finishes
• Approved for slip-critical connections
• Adjustable for sloped or tapered flanges (up to 15° with BK-style)
• Compatible with standard hex bolts, threaded rod, or eye bolts

Why use I beam clamps instead of welding or drilling?

Because they’re safer, faster, and more flexible.

• No hot work permits required: Ideal for oil and gas, food-grade, or clean room environments
• No damage to coatings: Drilling or welding can ruin paint or galvanization
• Quick install, easy removal: Great for temporary or adjustable steel connections

Welding and hot work may also require permits on-site per OSHA hot work safety standards.

Need proof? Check out our BeamClamp® line that’s been used in everything from stadium seating to wind turbine platforms. No spark, no torch, no mess.

Types of I beam clamps and when to use each

Here’s a quick breakdown of the most common I beam clamp types.

• Flat Flange Clamps (Type BA, BB): For parallel flanges in general steel-to-steel connections
• Sloped Flange Clamps (Type BT, BW): Designed for tapered S-beams and crane rails
• Self-Adjusting Clamps (Type BK1): Best for uneven or sloped flanges up to 15°
• Socket Screw Clamps (BE1, BE2): Adjustable for unknown flange thicknesses
• High-Friction Clamps (Type BY): Ideal for structural or seismic-rated connections

For high-friction or seismic connections, approvals like those from Lloyd’s Register confirm product strength under demanding conditions.

Installation tips for better safety and speed

Get it right the first time:

1. Measure flange thickness and match tail length or use adjustable clamps
2. Select the proper bolt grade and torque (Grade 5 or 8 is recommended)
3. Use location plates for 90° or multi-point connections
4. Never exceed the rated SWL per clamp — check load tables before install

You can also use a bolted joint calculator to estimate torque requirements based on bolt grade and diameter.

Real use cases: Where I beam clamps shine

• Industrial Rigging: Rigging clamps rated up to 5,000 lbs
• Pipe Supports: Clamp electrical, HVAC, and fire lines directly to structural steel
• Temporary Staging: Quick-install support beams, rails, or frames
• Infrastructure: Used in bridges, wastewater plants, offshore rigs

FAQs

Can I beam clamps be used on galvanized or painted steel?

Yes. They preserve protective coatings, unlike drilled or welded connections.

Are these clamps suitable for structural steel?

Yes. Many BeamClamp® models are third-party approved for structural load ratings, carrying Lloyd’s Register Type Approval, and select types—such as BA, BB, BF1, BG1, and BH1—also hold DIBt approval. Seismic approvals do not apply to BeamClamp products.

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Last reviewed: August 11, 2026