Type LR Girder Clamp

Self-adjusting girder clamp used to quickly connect steel beams with flat or tapered flanges and resist moderate tensile loading.

View technical specification Girder Clamp Configurator


The Type LR girder clamp is used to achieve a fast steelwork fixing connection between two steel beams or other steel sections where moderate load capacities are present. It consists of two parts, the clip and the saddle, which allow the clamp to self-adjust to suit flange thicknesses between 3mm and 24mm. Suitable for use on parallel and tapered flanges up to 15°. Manufactured from malleable iron and available with a hot dip galvanised or zinc plated finish to provide high performance and anti-corrosion protection.

Features & Benefits

  • Clamping ranges from 3mm - 24mm (size M24).
  • For parallel and tapered flanges up to 15°.
  • The leg of the saddle prevents the clamp from rotating.
  • The tail spans slotted clearance holes.


Click on an approval logo to download the certificate or report.

Packing Pieces

Packing pieces are available to increase the clamping range. Download datasheet for further information.

Location & End Plates

These plates ensure the clamps and bolts are located in the correct position relative to the supporting steelwork. Location plates are simple fabricated items designed to sit between the two sections to be clamped together to ensure the bolts are fixed at the correct centres. End plates are simple fabricated items that are pre-welded to support frames, bracket or sections, allowing connection to the supporting structure with standard Lindapter clamps. Download datasheet for further information.


  • Manufactured from malleable iron to BS EN 1562.
  • Available with zinc plated or hot dip galvanised finish.
  • Reaction to fire: A1 (Steel)

Durability and corrosion protection:

Corrosivity Class Galvanised Steel Electroplated Steel
C1 More than 50 years More than 20 years
C2 More than 50 years More than 5 years
C3 More than 20 years Not suitable

For C4 and C5 corrosion categories contact us.

Technical Specification

Click to view labelled diagram

Safe Working Loads (FOS 5:1) Dimensions
Product Code Bolt 8.8 Z Tensile / 1 Bolt Slip / 2 Bolts Tightening Torque* Clamping Range V Y X T Width with Saddle
kN kN Nm mm mm mm mm mm
LR101) M10 1.5 - 20 3 - 10 21 - 24 24 - 26 21 - 24 33
LR12 M12 5.8 0.9 69 3 - 12 26 - 29 25 - 31 25 - 29 39
LR16 M16 8.5 1.7 147 3 - 16 30 - 35 34 - 37 30 - 36 46
LR20 M20 14.7 3.0 285 3 - 20 42 - 49 46 - 51 41 - 48 57
LR24 M24 19.7 4.5 491 3 - 24 47 - 57 52 - 58 44 - 54 76

1) LR10 available in Hot Dip Galvanised only.

* Torque figures based on bolts / setscrews in an unlubricated condition.

  For Characteristic Resistances when designing a connection to Eurocode 3, please refer to DoP No.006

Faster to Install

No drilling or welding!

Independently Approved

Reasons to choose Lindapter

  • Save time and money

    Save time and money

    Clamping two steel sections together avoids time-consuming welding or conventional drilling and bolting.

  • Safer connections

    Safer connections

    On-site drilling and welding is avoided, removing the need for hot work permits and encouraging safer site conditions.

  • High strength

    High strength

    Lindapter clamps are manufactured from high strength materials to resist high load requirements and harsh environments.

  • Industry leading approvals

    Industry leading approvals

    Lindapter has earned a reputation synonymous with safety and reliability, gaining multiple independent approvals.

  • Adjustable


    Quickly align steel sections by sliding the section into the correct position before tightening the Girder Clamp to complete the installation.

  • Free connection design

    Free connection design

    Lindapter’s experienced Engineers can design a bespoke connection based on your specific requirements free of charge.

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