Thor Helical - Remedial Wall Ties

CE marked replacement wall ties for remedial lateral restraint.

remedial-helical- wall-ties-image-265px
Description:

Thor Helical Retrofit CD Ties are one-piece stainless steel helical ties with a patented twist accuracy and have a circumscribed diameter of 9mm.  Hammer-driven into small pilot holes, the remedial ties corkscrew into brick, block and concrete to deliver a mechanical fix that grips the wall on each side of the cavity.

The threaded interlock connection of the self-tapping helical wall tie exerts no expansive stress into the brickwork and will not loosen with vibration, unlike ties that have expanding mechanisms and only deliver point loadings.

The Thor Helical CD Tie system is patented across four Continents.  The helical wall ties incorporating a unique driving shank that is engaged by a short SDS adaptor. This overcomes safety issues and difficulties in application that can be encountered by earlier systems which use cumbersome, costly and unreliable telescopic tools.

  • Wall Tie Replacement
  • Pinning Masonry Arches
  • Adding Lateral Restraint by tying brickwork into the ends of floor joists
  • Securing Solid Walls of Double-leaf or Collar-jointed Construction
  • Tying Rubble-filled Walls
Benefits:
  • Suitable for remedial use in all types of masonry
  • Particularly useful where fire performance, low temperatures and material compatibility issues need to be overcome.
  • Require no resin or grout bonding agents
  • Cost effective tooling
Product Specifications

Typical Performance Loads in BRICK

(taken from CE Mark Testing for remedial wall ties)

Tension
1.94 kN
Compression
2.68 kN
Cavity
150mm

Typical Performance Loads in PERFORATED BRICK

(taken from CE Mark Testing for remedial wall ties)

Tension
1.99 kN
Compression
2.79 kN
Cavity
150mm

Typical Performance Loads in AGGREGATE BLOCK

(taken from CE Mark Testing for remedial wall ties)

Tension
2.87 kN
Compression
2.70 kN
Cavity
150mm

Typical Performance Loads in CONCRETE

(taken from CE Mark Testing for remedial wall ties)

Tension
2.37 kN
Compression
2.69 kN
Cavity
150mm

TYPICAL PERFORMANCE LOADS (taken from CE Mark Testing for lateral restraint in the end grain of timbers)

BS EN 845-1:2013 National Annex NA states that the lateral needs to provide an equivalent performance to the prescriptive 30mm x 5mm straps and the tension straps should have a declared tensile load capacity of at least 8kN.

Brick 215mm
5.61 kN
C16 Timber – End grain
4.10 kN

Ties are driven through a 215mm brick wall and into the end grain of a joist running perpendicular to the wall.  To meet this standard for lateral restraint straps installers must use a pair of 9mm ties in each joist-end.

MECHANICAL PROPERTIES OF THOR HELICAL CD TIES

Diameter
9mm
CSA mm2
15.6
0.2% Proof Stress N/mm2
>775
Ultimate Tensile Strength N/mm2 *
1050-1190
Mean Tensile Capacity**
17.47 kN

* Ultimate Tensile Strength is measured within a calibrated tolerance of +/- 2%

** Mean Tensile Capacity derived from CSA x Mean UTS

 

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