STEEL JOINTS

For use with Timber Boxing

A1, A2 and A3 provide floor joint edge protection using square edged steel flat bars positioned vertically. All Type A versions are used with timber formwork and do not include dowels. Type A1 is pre-assembled for mounting on top of a timber form. Type A2 has one pre-drilled side for nailing to formwork. The second side is tack-welded to side one. Welds are cut following the concrete pour to allow concrete shrinkage to take place. Type A3 is pre-drilled to allow side one to be nailed to formwork for the first concrete pour. The second side is pinned to the first side after formwork is stripped from the first pour. Type D is a version of Type A1, which is used for doorways, sometimes with a 10mm step across it.

Comprehensive pre-assembled system

Type B provides proven flat bar steel edge protection into a full, comprehensive pre-assembled formwork system which includes a sheet metal steel form and Dominator dowels at spacings to suit the slab thickness. A range of sizes is fabricated to suit the slab thickness. The use of Dominator dowels caters for joint widths up to 25mm in most floors. It allows for continuous pours over the joint, but can also be used as an edge form.

For new to existing concrete slabs

Type C provides flat bar steel edge protection, for use when casting a new slab against an existing slab. Side one is bolted to anchors drilled into the existing concrete. Side two is pinned to side one and cast into the new concrete.

For Expansion Joints

Type E is a fully pre-assembled flat bar steel edge protection system similar to Type B, modified to create an expansion joint. It incorporates a central compressible material, to meet the requirements of hot climate markets and shrinkage compensating concrete slabs

For precast concrete flooring systems

Steel angle edge protection for use in suspended precast floors, such as hollow-core etc. This ensures a straight and spall proof crack line where reflective cracking regularly occurs, over panel joints, in the topping slabs.

Sliding cover plate joint.

Type G provides a sliding cover plate joint system for a range of floors where high joint movement occurs due to the wide joint spacing. Type G is used in stressed slabs, jointless (high dosage) steel fibre slabs and shrinkage compensating concrete slabs. It has been in use since 2003. A robust cover plate slides over the joint as floor shrinkage occurs. Three versions (Types G45, G65, and G85) provide for expected joint width openings up to 85mm.

New to existing sliding cover plate joint

Type G-C can be used where a new slab is poured against an existing slab, but a cover joint system is required. The first side is fabricated to enable it to be mounted into the edge of an existing slab.

Joints that require leteral movement

Type H is similar to the Type B version, providing flat bar steel edge protection, but for floors where wider joint openings are expected. It is a full, comprehensive, pre-assembled product but differs as it incorporates heavy duty Lesa Hi-Move plate dowels for joint openings up to 35mm in most floors.

An economical version of the Lesa Type B Joint

Type K is an economical version of Type B and is available for slab thickness up to 200mm. It is fully pre-assembled, and its lighter construction is suitable for many circumstances and lighter floor loads with lower load transfer requirements

Free Standing cover plate joint

Type L is a full, comprehensive pre-assembled version of Armour Joint, with an upper joint armouring section similar to Type G. This provides a cover plate over wider joints and can be used where sealed joints are required. Up to 45mm joint movement is catered for with standard Type L, and special versions can cater for joint widths up to 85mm.

An economical version of the Lesa Type P Joint

Type M is an economical version of Type P using steel angle edge protection and is available for floor thicknesses up to 200mm. It is fully pre-assembled, incorporating dowels to suit lighter floor loads and load transfer requirement. (For heavier duty, see Lesa Armour Joint Type P).

Equal Edge armour joint protection

Type P is a fully assembled version using steel angles in place of flat bar for joint edge protection. This version is used where clients have a preference for steel angle joint edges and are used in installations such as supermarkets.