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Type F9 Girder Clamp

Adjustable flange clamp used to connect parallel running steel sections with flanges of the same width. Suitable only for flat flanges and light tensile loadings.

View technical specification


The Type F9 girder clamp is used to achieve a fast connection between two steel beams or other steel sections which run parallel with each other and where the flanges are of the same width. The clamp can be used with bolts or threaded rod and does not require a location plate making it a simple and cost effective solution. Suitable for use only on parallel flanges and applications with low tensile loadings. Manufactured from malleable iron and available with a hot dip galvanized or zinc plated finish to provide high performance and anti-corrosion protection.

Features & Benefits

  • Large clamping ranges from 34" - 334" (size (M24).
  • Fast, cost effective installation (no location plate required).
  • Perfect for temporary or permanent use.
  • Can be used with bolts or threaded rod for supporting pipes etc.
  • Supplied with or without a metric bolt.
  • For parallel flanges only.
  • Not suitable for tapered flanges.


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


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

Durability and corrosion protection:

Corrosivity Class Galvanized 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

Product Code Safe Working Loads Dimensions
with Bolt without Bolt Bolt 8.8 Z Tensile / 1 Bolt (FOS 5:1) Tightening Torque* Clamping Range V Y J X Width
kN Nm mm mm mm mm mm
LF9037WB LF9037NB M10 2.0 20 19 - 42 25 13 19 24
LF9050WB LF9050NB M12 2.8 39 26 - 60 35 17 24 30
LF9062WB LF9062NB M16 5.6 93 29 - 69 43 21 28 35
LF9075WB LF9075NB M20 8.4 177 32 - 82 51 25 48 44
LF9100WBHDG1) LF9100NBHDG1) M24 14.0 235 45 - 95 76 38 55 63

1) 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.010

Without Bolt With Bolt Safe Working Loads (FOS 5:1) Dimensions
Product Code Bolt / Rod Z Product Code Bolt Z Tensile Resistance / 1 Bolt Tightening Torque* Clamping Range V Y J X Width
lbs ft lb
LF9037NB 38" LF9037WB M10 (38") 440 15 34" - 11116" 1" 12" 34" 1516"
LF9050NB 12" LF9050WB M12 (12") 630 29 1" - 238" 138" 1116" 1516" 1316"
LF9062NB 58" LF9062WB M16 (58") 1260 69 118" - 234" 11116" 1316" 118" 138"
LF9075NB 34" LF9075WB M20 (34") 1880 131 114" - 314" 2" 1" 178" 134"
LF9100NBHDG1) 1" LF9100WBHDG1) M24 (1") 3147 173 134" - 334" 3" 112" 2316" 212"

1) Available in Hot Dip Galvanized only.

*Torque figures based on fasteners in an unlubricated condition.

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

    Drilling and welding in the field 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 detailing

    Free connection detailing

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

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