How to Select the Right BeamClamp for Wide Flange Beams

Wide flange beams are a staple in structural steel construction. Their strength and efficiency make them a go-to choice for everything from commercial buildings to industrial frameworks. But connecting them presents a challenge: how do you create a secure joint without resorting to welding or drilling?

BeamClamps provide a reliable answer. By fastening directly to the beam’s flange, they allow safe, adjustable connections that save time on site and maintain the integrity of the steel. This guide explores the main types of BeamClamps designed for wide flange beams and shows how to choose the right one for your project.

What Is a Wide Flange Beam?

A wide flange beam, often called a W-beam, is one of the most common shapes in structural steel construction. It consists of two broad, horizontal flanges connected by a vertical web. This design distributes loads efficiently, making wide flange beams strong yet relatively lightweight compared to older I-beam designs.

These beams are produced in a wide range of sizes to suit different applications. For example, you’ll find compact sections like W8×10 used in lighter framing, mid-sized sections like W12×26 in building floors, and larger sections like W14×43 in heavy structural work. The key dimensions that matter most are the flange width and flange thickness, since these influence how the beam performs and what types of connections can be made.

Because of their versatility, wide flange beams are used across commercial buildings, bridges, industrial plants, and more. They’re often the backbone of steel structures, carrying vertical and lateral loads while providing a reliable framework for other components.

Wide Flange Beam diagram

Why Use BeamClamps on Wide Flange Beams?

BeamClamps provide several advantages when connecting wide flange beams:

• No welding required – eliminates hot work permits and reduces installation risks.
• No drilling needed – keeps the beam’s strength intact.
• Fast, reversible connections – easy to adjust or remove if site conditions change.
• Proven strength – tested Safe Working Loads (SWL) up to 7,524 lbs tensile per bolt depending on clamp type.
• Corrosion resistance – all clamps are hot-dip galvanized to BS EN ISO 1461 for durability.

BeamClamp Options for Wide Flange Beams

Type BA + BB (Flat or Parallel Flanges)

The BA and BB clamps are the standard solution for wide flange connections. Used in pairs, the BA captures the bolt head while the BB provides a flat surface for tightening. Packers (BF1, BG1, BH1) extend their range for thicker flanges.

• Flange Fit: Parallel or up to 8° taper
• Available Tail Lengths: Short, Medium, Long
• Safe Working Load (SWL): Up to 4,743 lbs tensile per bolt with 1″ clamp
• Use Case: Wide flange-to-flange connections in building frames and supports

Type BK1 (Self-Adjusting Clamp)

The BK1 clamp uses a two-part design with a hemispherical washer, allowing it to self-adjust to variations in flange thickness or taper (up to 15°). It’s ideal for projects where steel dimensions vary or tolerances are tight.

• Flange Fit: Parallel or sloped up to 15°
• Available Sizes: 5/16″ to 1″ bolts
• Safe Working Load (SWL): Up to 5,836 lbs tensile per bolt with 3/4″ clamp
• Use Case: Industrial projects and heavy beams with uncertain flange thickness

Type BY (Heavy Duty Clamp)

The BY clamp provides a robust option for heavy-duty applications. It uses different tail lengths and packing pieces (BF3, BF4, BH2) to sit squarely against the flange while handling higher loads.

• Flange Fit: Wide flange and heavy-duty applications
• Available Sizes: 3/8″ to 1″ bolts
• Safe Working Load (SWL): Up to 7,524 lbs tensile per bolt with 3/4″ clamp
• Use Case: Heavy structural beams in industrial plants, bridges, and large-scale steelwork

Comparison Chart: BA + BB vs BK1 vs BY

Installation Examples

Installing BeamClamps requires no hot work and only standard tools:

1. Position the clamp against the beam flange.
2. Insert the bolt using the correct grade (Grade 5, A325, or A490).
3. Add packing pieces (if required) to match flange thickness.
4. Tighten to torque – examples from the catalog:
   • 1/2″ bolts: 51 ft-lbs
   • 5/8″ bolts: 109 ft-lbs
   • 3/4″ bolts: 210 ft-lbs
   • 1″ bolts: 355 ft-lbs

Check out torque values and flange dimensions using LNA Solutions catalog tables before installation.

LNA Solutions Product Catalog

Safety and Load Considerations

• Confirm flange thickness and match it with the correct tail length and packing pieces.
• Do not exceed Safe Working Loads (SWL) listed in the catalog.
• Maintain a 5:1 factor of safety as specified.
• Check bolt torque against catalog tables to ensure full load capacity.

Conclusion

Wide flange beams require connections that are strong, reliable, and safe. BeamClamps make this possible without welding or drilling, preserving the steel while providing flexibility for on-site adjustments.

When choosing a clamp:

• Use BA + BB for standard wide flange connections.
• Choose BK1 when flange thickness varies.
• Select BY for heavy-duty applications.

By matching clamp type to beam size and load, you’ll achieve secure connections that meet engineering requirements.

FAQ

What clamp is best for wide flange beams?

• BA + BB for flat or parallel flanges
• BK1 for variable flange thickness
• BY for heavy-duty wide flange connections

Can you clamp directly to a wide flange without welding?
Yes. BeamClamps are designed for direct connections without welding or drilling.

How much load can a BeamClamp handle on a wide flange?
It depends on the clamp:

• BA + BB: Up to 4,743 lbs (1″ bolt)
• BK1: Up to 5,836 lbs (3/4″ bolt)
• BY: Up to 7,524 lbs (3/4″ bolt)

What tools are needed to install a BeamClamp on a wide flange beam?
Only standard tools such as wrenches or impact drivers. No hot work is required.

Are BeamClamps approved for safety?
Yes. They are manufactured from ductile iron, hot-dip galvanized to BS EN ISO 1461, and designed with a 5:1 factor of safety. Many are also Lloyd’s Register and DIBt approved.

Last reviewed: September 25, 2025