Type AF High Friction Clamp

Type AF High Friction Clamp

For applications where high frictional loads are encountered, Lindapter has developed the high strength type AF, which offers excellent frictional clamping performance. Cast from SG iron, the AF is designed to be used with ASTM A325 Grade 5 or ASTM A490 bolts if required, and allows significantly increased torques to be applied. The profiled nose of type AF enables various tapers of beam flange to be accommodated (maximum 10 degrees).

With the use of the type AFW adapter washer, the product can be adapted to suit two differing conditions. Firstly, using the washer as shown in diagram 1, the AF's recessed head can be filled in to act in the same way as the flat top type B Lindapter. With the washer inverted as shown in diagram 2, the larger head size of ASTM A325 Grade 5 or ASTM A490 bolts can be captivated.

The increased torques necessary to achieve the type AF's elevated performance require the use of a high strength location plate.

Special packing pieces are required with the type AF to enable adjustment to differing beam flange thicknesses.

Material: SG Iron to BS EN 1563:1997
Standard Finish: Hot Dip Galvanised to BS EN ISO 1461:1999

Product Code * Bolt Size (Z) Bolt Grade Torque (lb ft) Safe Working Loads (5:1 Factor of Safety)
Frictional (lbs) Shot blast and painted steelwork Frictional (lbs) Galvanised steelwork Tensile (lbs)
Per 2 Bolt connection Per bolt
AF062 5/8" A325 Grade 5 177 1798 2248 3597
AF062 5/8" A490 221 2473 2698 See Notes Below
AF075 3/4" A325 Grade 5 347 2922 3597 5901
AF075 3/4" A490 477 4496 5620 See Notes Below

* Add suffix S or M to product code to denote tail length required.

NB. Frictional load figures are based on type AF and location plates in hot dip galvanised finish to BS EN ISO 1461:1999
Hardened washer to ASTM F436 must be used.
In tensile loading the limiting factor is the bolt capacity. Combined frictional and tensile loads must satisfy AISC LRFD 'Specification for Structural Joints using ASTM A325 or A490 Bolts' Section 4(b).

Product
Code *
Dimensions (ins) T Width
Y X Tail Length V Type AF Type AF
with washer
Short Medium
AF062 1 3/8" 1 15/32" 5/16" 19/32" 7/8" 1 1/16" 1 29/32"
AF075 1 9/16" 1 17/32" 3/8" 23/32" 1" 1 1/4" 2 7/32"

* Add suffix S or M to product code to denote tail length required.


AFW Adapter Washer

Material: SG Iron to BS EN 1563:1997
Finish: Hot dip galvanised to BS EN ISO 1461:1999.

Product Code Bolt Size Z Dimensions (ins)
Thickness T Size Hexagon A/F
AWF062 5/8" 3/16" 1 7/16" X 15/16" 1 1/16"
AWF075 3/4" 1/4" 1 9/16" X 1 3/16" 1 1/4"

Location Plate Details

For the type AF, location plates or strips must be manufactured from steel flat to ASTM A572 Grade 50 or equivalent strength.

Bolt Size Bolt Hole Dia Plate Size Bolt Hole Centres Plate Thickness Min. Width of Location Strips
5/8" 11/16" Beam width
+ 4"
Beam width
+ 11/16"
5/8" 4"
3/4" 13/16" Beam width
+ 5"
Beam width
+ 13/16"
3/4" 7"

Packings

These packings are for use with the High Friction Clamp only, to adjust the clamp to meet differing fixing thicknesses.

Material: Mild Steel to BS EN 10025:1990
Finish: Hot Dip Galvanised to BS EN ISO 1461:1999.

Dimensions

Product Code Bolt Size Y X T Width
AF062CW 5/8" 5/16" 1 9/16" 5/64" 2"
AF075CW 3/4" 3/8" 1 19/32" 5/64" 2 3/16"
AF062P1 5/8" 5/16" 1 21/32" 3/16" 2 1/16"
AF075P1 3/4" 3/8" 1 25/32" 3/16" 2 3/16"
AF062P2 5/8" 5/16" 1 21/32" 3/8" 2 1/16"
AF075P2 3/4" 3/8" 1 25/32" 3/8" 2 3/16"

Trademarks are the properties of their respective owner(s).

(November 2021), updated May 2012 CSS, August 2000

The descriptions, illustrations, specifications, dimensions, and part numbers are subject to change without notice.


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