Thor Helical - Grout Free "Strap" Ties

High tensile, 12mm, helical bars used without grout or resin.

Helical-Strapping-Ties-CDT12-image-265px
Description:

Thor Helical 12mm diameter, self-tapping strap ties are driven deep into masonry to reconnect solid masonry without the need of cement, grout or resin.  Grout free ties are ideal for use when connecting solid walls on heritage houses, listed buildings and more modern constructions.

The heavy-duty, high tensile, stainless steel ties are available in three lengths 910mm (36″), 760mm (30″) and 610mm (24″). When hammer-driven into a small pilot bore hole the connectors corkscrew into brick, block, stone and concrete to offer outstanding resistance to compression, tension and shear loads.

Manufactured from 316 marine grade stainless steel and with a cross sectional area of more than 28mm2, Thor Helical Grout Free Ties are ideal for pinning arches and re-connecting walls, such as at corners and at party wall junctions, without the need for bonding agents. This feature eliminates issues of material compatibility that often arise when cement grouts are used in old or listed buildings with lime mortar.

Benefits:
  • No need for bonding agents – eliminates material compatibility issues
  • Can be used at sub-zero conditions
  • No material compatibility issues on old historic buildings with lime mortars
  • Faster to install than grouted ties – reduces labour costs
Product Specifications

MECHANICAL PROPERTIES OF THOR HELICAL STRAP TIES

Diameter
12mm
CSA
28.2mm2
0.2% Proof Stress
>765N/mm2
Ultimate Tensile Strength*
1050-1190N/mm2
Mean Tensile Capacity**
31.58kN

* Ultimate Tensile Strength is measured within a calibrated tolerance of +/- 2%
** Mean Tensile Capacity derived from CSA x Mean UTS

TYPICAL PERFORMANCE LOADS AT 215mm EMBEDMENT (from CE Mark Testing)

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

Strapping Masonry to Masonry
8.45kN
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