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Type FF FloorFast®

An innovative floor fixing for securing steel chequer plate flooring to the supporting steelwork without the need for on-site drilling or welding.

View technical specification


The Type FF FloorFast fixing eliminates the need for costly scaffolding or elevated floors as access to the underside of the flooring is not required. Installation is carried out quickly and safely from above, often by one person, significantly reducing costs. The cast body along with the unique stepped clamping face, which locks under the steelwork, provides outstanding clamping force and a secure connection.

Features & Benefits

  • Superior clamping force from the cast body.
  • Lloyd’s Register Type Approval for resistance to shock and vibration.
  • Zero protrusion above the surface of the floor plate.
  • Designed for pedestrian walkways 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 or stainless steel grade 316.
  • Available with zinc plated or hot dip galvanised finish.
  • Reaction to fire: A1 (Steel)

Durability and corrosion protection:

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

For C4 and C5 corrosion categories contact us.

Technical Specification

Click to view labelled diagram

Flange Thickness Dimensions
Product Code Bolt min 4.61) Floorplate Thickness Standard With Ferrule2) Hole Ø Countersunk Ø for Bolt Countersunk Depth for Bolt Tightening Torque Hexagon Key
Z t - 10 20 30 d D D t1 t1
mm mm mm mm mm mm mm mm mm mm Nm mm
FF08 M8 4.5 - 12 3 - 15 13 - 25 23 - 35 33 - 45 9 17 - 4 - 11 5
FF10 M10 5 - 12 3 - 15 13 - 25 23 - 35 33 - 45 11 21 19 5 4 22 6
FF12 M12 6 - 12 3 - 15 13 - 25 23 - 35 33 - 45 13.5 25 23 5.8 4.8 22 8

1) Hot dip galvanised M10 and M12 versions are supplied with a slotted countersunk screw.

2) To order FloorFast with a ferrule, simply add ferrule size to product code.

  For Characteristic Resistances when designing a connection to Eurocode 3, please refer to DoP No.013

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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