Helical bars are stainless steel rods used for stitching cracks in brick walls, repairing sagging lintels, reinforcing masonry arches, and developing masonry beams to span localised patches of subsidence.
Typically bonded in the bed-joints of a wall with a suitable polymer-modified mortar, the bar and grout combination increases the toughness and strength of brick, block and stone walls and makes them less likely to crack.
They work with the masonry to generate lintels (beams) within walls and to increase the flexural strength, tensile strength and shear resistance of walls to combat building, wind, and seismic loads.
The ductile nature of the helically twisted bars allows them to accommodate cyclic thermal and moisture movements of a wall whilst holding the brickwork together and guarding against sudden failures
In manufacturing the bars, wire rolling machines progressively alter the shape of the wire to produce a flange-profiled wire. The cold-rolling process work hardens the steel and doubles its tensile strength. When twisted into a helix shape, the high-tensile spiral bar has high helical-flanges and deep helical troughs which interlock superbly within high-strength mortars and grouts.
Why are Twistfix helical bars superior to other helibar types?
Twistfix Helical bars are available in 5 diameter sizes and a selection of lengths ranging from 1m to 7m long. They provide a quick, easy and cost-effective means of restoring or adding strength to existing buildings. A series of structural repair details and 'how-to' animations demonstrate the ease and versatility of installing these UK manufactured brick reinforcement products.