fischer fixings UK Ltd Hilti (Gt. Britain) Ltd Rawlplug Ltd Spit Fixings DeWalt EJOT UK Ltd

Testing Categories

Testing Categories

The following testing categories are listed for members who have been accredited with that capability:

General Purpose Anchor Testing
 CFA Approved Testers accredited for this category have the capability to test anchors in tension with projecting studs and hexagon bolt heads in diameters M6, M8, M10, M12 and M16, together with eye type fixings, up to 20 or 25kN. The broad scope of their overall testing capability is shown in the full listing (for the meaning of initials hover over the box) Click on their name to go to their own page which includes a full description of the company, the service they offer and the geographical area they serve with a link to their own website.

 AST Anchors for Scaffold Ties
 Anchors used to tie scaffold structures back to buildings should be tested in accordance with Guidance Note "Anchorage systems for Scaffolding:- TG4:11" published jointly by the Construction Fixings Association and NASC (National Access and Scaffolding Confederation). Members claiming accreditation for this category will have demonstrated that they will work to these requirements. TG4:11 is downloadable free of charge from the Guidance Note section of the website.

ASD Anchors for Seasonal Decorations. This application, usually involving the attachment to a wide variety of building structures of catenary wires going across streets for festive decorations such as Diwali and Christmas lights, is a highly safety critical application. Recommendations for the selection of anchor systems, their installation, testing and regular inspection are detailed in a CFA Guidance Note: Anchors for Seasonal Decorations which is itself integral to the Professional Lighting Guide 06 "Guidance on installation and maintenance of seasonal decorations and lighting column attachments" published by the Institution of Professional Lighting Engineers.

 

Testing-Categories3

PIR Post-Installed Rebar  
Reinforcement may be installed, e.g. for the purpose of providing starter bars for the casting of new concrete sections, using special resin anchoring systems and cementitious grout etc. The problems of testing are usually associated with the difficulties of getting a grip on deformed bars which may also be bent. Companies accredited for General Purpose anchor testing and have the necessary equipment will be accredited in this category.

 

 

RWT Remedial Wall-Ties
 Remedial wall-tie systems need particular care in testing and frequently need testing at different stages of their installation to ensure that their security in both leaves is checked. Specialist equipment is also needed. Companies accredited for this category will have satisfied the CFA that they are knowledgeable in the correct procedures and have the appropriate equipment.

 

SHE Safety Harness Eyebolts 
More accurately known as Class A1 Anchor Devices for Fall Arrest they may also be used for other classes of fall protection such as Restraint, Work Positioning and Rope Access. Testing-Categories2In all cases they must be installed and examined in accordance with the requirements of (among other codes and standards) BS 7883:2005 Code of Practice for the design, selection, installation, use and maintenance of anchor devices conforming to BS EN795. To be accredited for "testing" such anchor devices - referred to in the code as "Periodic Examination" - companies must have satisfied the CFA that their staff are fully competent in this safety critical topic and that they have the necessary reporting systems and test equipment. Accreditation for testing does not imply competence in the installation of such systems but usually a complete knowledge of all aspects of installation is necessary for the purposes of Periodic Examination.

Other specialist areas  
Other specialist capabilities claimed by members will be backed up with appropriate evidence of equipment and competence.

 

 

Testing in shear

Testing-CategoriesThis is rarely required as the shear capacity of fixings in concrete, if installed at the manufacturer's recommended edge distances and centre spacings, is usually dependent on the strength of the anchor components (primarily the bolt itself and any shear sleeve) and is little affected by installation quality. Manufacturer's data may therefore be relied upon. Shear tests may be required if significant loads are to be transferred into other, weaker substrates e.g. brickwork or stonework and may occasionally be valid in concrete at edge distances lower than recommended by the manufacturer if edge reinforcement is present - seek the manufacturer's advice. When shear tests are carried out displacement is usually significant and becomes the decisive factor. Movement is therefore usually monitored accurately when testing in shear. This, together with the need to support the reaction forces via some sort of fixture, means that shear testing is time consuming and expensive. Some members have the capability to test in shear and this is indicated in the listing and on their web page.