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Remedial Wall Ties

Remedial Wall Ties

Remedial Wall Ties

Corrosion of Cavity Wall Ties

Wall ties are an essential element in the stability of masonry panels. Prior to 1978, wall ties were usually manufactured from galvanised mild steel. These ties were expected to last the lifetime of the building, but for many years it has been recognised that some of these wall ties have corroded after only 15 or 20 years.

When these ties corrode, they can expand to seven times their original thickness. This causes the brickwork to crack at the mortar joints and can result in major damage and sometimes the collapse of walls.

Ancon 63 Mechanical/Mechanical (MM63)

Used when tying together two leaves of solid materials, this tie has mechanical expanders at each end. Requires 11mm Ø holes.

Lengths:
200mm for 35-60mm cavities
225mm for 61-85mm cavities
250mm for 86-110mm cavities
300mm for 135-160mm cavities

Ancon 63 Resin/Mechanical (RM63)

For use when the material in the inner leaf is perforated, of low-density or friable material. A resin fixing may be used to eliminate any imposed stress. Requires 11mm Ø holes.

Lengths:
200mm for 35-60mm cavities
225mm for 61-85mm cavities
250mm for 86-110mm cavities
300mm for 135-160mm cavities

Staifix Resin/Resin (RR)

Used where mechanical expanders are unusable. Normally inserted into a 10mm hole, but if test facilities are required, a 12mm hole must be used.

A plastic sieve can be used to retain resin and is particularly useful in perforated brick or hollow blockwork. A 12mm hole is required to fit sieve.

Lengths:
180mm for 40-60mm cavities
200mm for 61-80mm cavities
220mm for 81-100mm cavities

Stairib Bar

Stainless Steel ribbed bar, resin-grouted into the inner and outer leaves. Requires 10mm Ø hole (6mm dia. bar) or 12mm Ø hole (8mm dia. bar).

Lengths:
As required. Diameter 6, 8mm

 

 

Ancon AC 31

Used where bricks are removed then replaced in the outer leaf. The wavy end is resin-bonded into the inner leaf in a 10mm Ø hole. The triangular end sits in a bed joint. Ancon AC31 can be supplied with a drip or a neoprene ring.

Lengths:
175, 200, 225, 250, 275, 300mm

 

Ancon AC 31C

Similar to the AC 31 but cranked by 25mm to aid fixing to the inner leaf. Requires 10mm Ø holes.

Lengths:
175, 200, 225mm

 

TeploTie (Type 2)

Basalt fibre wall tie that can be resin-fixed in remedial and retrofit applications. This tie has a thermal conductivity of only 0.7W/mk. Requires 8mm Ø hole (6mm dia. bar) or 10mm Ø hole (7mm dia. bar).

Lengths:
275, 300, 325, 375, 400, 425mm

 

 

HRT4/R

Used for tying the two leafs of a cavity wall or separating wall where the first leaf has already been built. The wavy end is resin-bonded into the existing wall in a 10mm Ø hole. The tie is based on the Staifix HRT4 and has similar properties.

Lengths:
200, 225, 250mm

 

 

Type A R/R

This is designed as a remedial tie for a separating wall. It will normally be inserted in 10mm Ø holes and resin-bonded into both leaves. It meets the requirements of a Type A wall tie to Approved Document E.

Length:
225mm

 

Staifix-Thor Helical Crack Stitching Kit

New from Ancon, the Staifix-Thor Helical Crack Stitching Kit is a high strength, non-disruptive solution for the permanent repair of cracked masonry. Click here for more information.

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