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Once correctly installed, helically twisted bars provide strong reinforcement to fortify lintels and give a property a new lease of life. Installation is complete in seven easy steps, which are listed below.
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The ties can be installed using a SDS-Plus shank hammer drill to drive and countersink the tie. The unique design of the helical tie means the tie can be easily driven into a 5.5mm pre-drilled pilot hole. The fins of the tie undercut the masonry when being driven into the substrate to provide an expansion-free anchorage that will withstand tension and compression loads. The primary component of a masonry stitching kit is the helical stitching bars. These bars are often made of stainless steel and are twisted - helical refers to a spiral shape - to provide extra strength and flexibility. Where timber lintels are used, often in older properties, you are at risk from wood rot (wet and dry) as well as wood boring beetles. This can affect the structural integrity of the timber and mean that need you to replace or repair them using helical spiral bars as outlined in this guide.
What Causes a Cracked Brick Lintel?
Insert a second helical bar into the incision about halfway into the incision. Ensure a 10mm gap between the two bars. General builders are able to buy Twistfix helical bars in a wide range of lengths and diameters; all with improved product tolerance and consistency.
How to Use Helical Bars for Lintel Repairs - Twistfix
The Helifix HeliBar is a helical stainless steel reinforcing bar, with substantial tensile properties, used for strengthening and stabilising masonry in both new build and remedial situations. The helix shape rod is excellent for bed joint reinforcement. The helix's peaks and troughs boost the bar's grip in mortar. Helical bars are helpful for various masonry repairs. Push the second bar into the grout, reaching around 50% of slot depth; this should always be at least 10mm from the first bar. Once again, trowel any excess grout to ensure full encapsulation of the rod. Easi-Fix Helical Bars are manufactured from 304 grade stainless steel and each bar is cold rolled to further harden the steel and increase its tensile strength. During the cold roll/ twisting process the unique fin design is formed which imparts strength and allows the anchoring grouts to form a cohesive bond to the bar. Our unique helical structure is designed with over 25 years’ experience and offers the user complete confidence in the product’s ability to perform over time. Easi-Fix - Specialist solutions. Made possible.Push a first helical bar into each grouted aperture, to about 75% of the slot’s depth. To ensure the rod is appropriately encapsulated, use a trowel or pointing iron to compress any displaced grout. This guide aims to answer these questions and take you through how to repair lintels with helical spiral bars. Apply a second bead of anchor grout into the slot, making sure that the first bar is completely covered. Trowel away any excess grout before adding the second helical bar. This bar should reach around half the depth of the slot and be at least 10mm from the first bar. Push the helical bar firmly into the grout to around two thirds of the depth of the slot. Make sure that the bar extends 500mm either side of the window or door. Helically twisted masonry reinforcementrods have for 30 years been used in the structural repair sector of the UK building industry; but do you know whether Helifix Helibars or Twistfix bars have been used? The original Helibars were invented and patented by Twistfix Director WilliamOllis, whorecentlyre-engineered his invention. These upgraded Twistfix bars are produced with a greater degree of product consistency to improve upon the performance of the early Helifix product.
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Twistfix only supplies helicalbars produced with this advanced engineering.The upgraded bars areproduced in the UK's only manufacturing facility that, under one roof,takes in round wire and sends out finished helical products. Other manufacturers merely part-process pre-shaped wire thathas been cold roll-profiledby a third party. Helical bars when used for lintel repairs are available in three and seven metre lengths. These longer lengths allow the bars to extend beyond the window or door by the required 500mm. You can also cut the longer lengths to the exact size required. Twistfix helical bars are bonded into slots that have been cut at pre-determined levels within the masonry. In the longer lengths they are used mostly in lots of four, two rows each with a pair of bars, to form the upper and lower flanges of a deep masonry beam which will carry quite a large area of masonry above an unsupported area. It does this by redistributing the load placed on the structure to solve any problems which may have been caused due to localised structural movements. With the addition of a second bar, the stress forces that act on the lintel are further redistributed. The tensile strength exhibited by a lintel reinforced with a helical bar surpasses the alternatives, often many times over. With the lintel restored, you remove the risk of the lintel failing and any dangerous repercussions. Installing Helical Bars for Lintel RepairsClear all loose debris from the newly chased apertures and use clean water to ensure they are thoroughly flushed out and wet-down before installation of the grout. Wetting the masonry reduces suction of the liquid from the grout.
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