Why Thor Helical

Precision die-formed helical fixings — manufactured for superior strength, consistency and performance.

Founded by the Inventors of Helical Wall Ties

Thor Helical was founded by the very inventors of helical wall ties. The company's products are used globally for both new construction and renovations, with a distribution network spanning over 50 countries worldwide.

Thor Helical's product development team creates new twisted wire products to meet global demands for energy efficiency and better construction. Their unique, patented manufacturing process — from wire to finished product — ensures consistent quality that no competitor can match.

This in-house control provides high-performance, cost-effective products with quick and easy installation and uniform distribution of loading over the helical bar — giving Thor Helical a leading edge over all other helical bars on the market.

1025–1225

N/mm²

Ultimate Tensile Strength

±2%

tolerance

UTS Calibration

304/316

grade

Stainless Steel

Global

distribution

Authorised Distributors

Die-Formed vs Spin-Twisted

The manufacturing process is the critical differentiator. Here's exactly why die-forming produces a superior product.

Thor Helical — Die-Formed

Patented precision manufacturing

Consistent Pitch

Die-formed process controls pitch precisely along the entire length. Every thread is identical — ensuring uniform load distribution and predictable, certified performance.

Stronger Core

Controlling the die-formed process reduces internal stresses, preventing weak points. The bar maintains full structural integrity from tip to tail.

Superior Quality Control

Patented process delivers complete control over the finished tie. Every bar leaves the factory to the same precise specification — no batch-to-batch variation.

Greater Cross-Sectional Strength

Greater strength over cross-sectional area compared to all other helical tie products. The die-formed profile maximises every mm² of steel.

Competitors — Spin-Twisted

Common industry manufacturing deficiencies

Inconsistent Pitch

Spin-twisted manufacturing can create an inconsistent pitch that often varies along the bar length. This reduces load-bearing capacity and structural performance.

Internal Stress Points

The spinning process introduces internal stresses throughout the bar — creating potential failure points distributed along its entire length.

Variable Finished Product

Inconsistent manufacturing can result in variable finishes and therefore unreliable performance characteristics. No two bars are identical.

Substrate Damage

Variable pitch causes each subsequent thread to bore out more of the substrate — similar to a bolt stripping its threads. The result: weakened mechanical connection and reduced anchoring capacity.

Full Product Range Overview

All products manufactured from Grade 304/316 Austenitic Stainless Steel to BS EN 845-1:2013+A1:2016

Remedial Products

Cavity Wall Ties (Ø8, 9 & 10mm)
Timber Frame Wall Ties (Ø5mm)
Crack Stitching Bars (Ø5–9mm)
Masonry Pinning (Ø9, 12mm)
Lintel Repair Bars (Ø6mm)
Lateral Restraint Ties (Ø8, 12mm)
Joist-End Restraint Ties (Ø9mm)
Seismic Connectors
Concrete Repair Pins (Ø7, 9mm)

New Build Products

Timber Frame Wall Ties (Ø5mm)
Thin Joint Wall Ties (Ø7mm)
Batten Frame Fixings (Ø7mm)

Insulation Products

ISF18A Plasterboard (Ø7mm)
ISF18 Flat Roof (Ø7mm)
Super-7 Warm Roof (Ø7mm)
ISF35/ISF60 EWI (Ø7mm)

Typical Properties of Thor Helical Bars

Full range properties — UTS measured within ±2% calibrated tolerance

Diameter (mm)	CSA (mm²)	0.2% Proof Stress (N/mm²)	Ultimate Tensile Strength (N/mm²)	Mean Tensile Capacity (kN)
5	6	>880	1025–1225	7
6	8	>870	1025–1225	9
7	10	>880	1025–1225	11
8	13	>790	1025–1225	14
9	16	>850	1025–1225	17
10	20	>790	1025–1225	22
12	28	>820	1025–1225	30

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