BowTie

 

For restraining bowed walls

BowTie HD Application 446x300.jpg

BowTie is a long stainless steel tie used to stabilise bulging walls, without any external plates, by securing them into the ends of internal floor joists.

BowTie HD is a heavy duty 12mm diameter threaded bar with self-cutting end used to restrain bowing building walls by securing them to internal parallel floor joists or roof beams.

System Components

  • Drill bit for clearance hole

  • BowTies

  • Power support tool

  • HD Driver

  • Hand support tool

  • PolyPlus resin cartridge with extension nozzles and applicator

Installation

BowTie installation 1.jpg

1. Mark the position of the joist centre on the external wall and then drill a clearance hole (normally 12mm) through the wall (and first joist if parallel to the wall). Clean out the hole

BowTie installation 2.jpg

2. Fit the BowTie Support Tool to an SDS rotary hammer drill, insert the BowTie and drive it into joist end to the required depth – at least 75mm (or through the second joist if parallel)

BowTie installation 3.jpg

3. Fit the plastic sleeve over the BowTie and use the support tool to push it to the back of the hole in the masonry (in the outer leaf in a cavity wall)

BowTie installation 4.jpg

4. Inject PolyPlus resin to fill the hole and bond the BowTie to the masonry and then make good

BowTie HD

BowTie HD installation 1.jpg

1. Mark the position of the joist centre on the external wall and then drill a clearance hole (normally 16mm) through the wall. Clean out the hole

BowTie HD installation 2.jpg

2. Fit the BowTie HD Support Tool to an SDS rotary hammer drill, insert the BowTie HD and drive it (off hammer) into, and through, the first and second joists

BowTie HD installation 3.jpg

3. Fit the plastic sleeve over the BowTie HD and use the support tool to push it to the back of the hole in the wall (outer leaf in a cavity wall)

BowTie HD installation 4.jpg

4. Inject PolyPlus resin to fill the hole and bond the BowTie HD to the masonry, allow the resin to gel and then make good

Applications

  • For stabilising bowed external building walls by securing them to internal floor and ceiling joists

  • Standard BowTies are recommended when installing into joist ends

  • BowTie HDs are recommended when installing into joist sides

CemTie

 

Grouted tie for stabilising solid masonry

CemTie sysfv.jpg

CemTie is a versatile, fully grouted, remedial tie used to stabilise all forms of solid masonry, secure failed lintels and brick rings, reconnect separated internal and external building walls and repair parapets.

 

System Components

  • CemTies of different lengths
  • Manual applicator and two extension nozzles

  • Long series drill bits

  • Brush for cleaning hole

  • HeliBond cementitious grout

Installation

CemTie installation 1.jpg

1. Drill clearance hole to required diameter and depth and flush clean

CemTie installation 2.jpg

2. Push CemTie fully into grout-filled pinning nozzle of grout gun and insert nozzle to the back of the hole

CemTie installation 3.jpg

3. As grout is injected the CemTie is carried with it

CemTie installation 4.jpg

3. As grout is injected the CemTie is carried with it

Applications

  • Lintel repairs

  • Securing multi-layer brick rings in bridges, tunnels and arches

  • Reconnecting separated internal and external building walls

  • Securing delaminated masonry

  • Repairing and securing parapets, cornices and decorative fascias

DryFix

 

Dry mechanical pinning and remedial tying system

20120306-chp11878.jpg

DryFix is a versatile and rapidly installed mechanical pinning and remedial tying system that requires no resin, grout or mechanical expansion.

Other types of the DryFix tie are available for specialist applications. For securing delicate terracotta fixings Helifix offer the DryFix Terracotta, for securing loose render there is the DryFix RenderPin and for securing a soft outer leaf material to a hard inner leaf material is the DryFix Asymmetric.

System Components

  • RP Drill bits for drilling pilot holes (where necessary)

  • Load Test Unit and Pull Test Key

  • Special Power Driver Attachment for rapid installation

  • Power Driver Extension (where necessary)

  • DryFix tie

  • SDS Drill for installation

Installation

Dryfix installation 1.jpg

1. Drill small pilot hole using rotary percussion drill, 3-jaw-chuck type

Dryfix installation 2.jpg

2. Load tie into DryFix Power Driver Attachment fitted to SDS hammer drill

Dryfix installation 3.jpg

3. Drive in tie until outer end is fully recessed below face of masonry

Applications

  • Versatile replacement wall tie

  • For securing multiple layers of masonry

  • For pinning delicate masonry features

Crack Stitching 

 

The most efficient way to repair structural cracks

Crack Stitching Installation 4.jpg

Helifix Crack Stitching repairs and stabilises cracked masonry using stainless steel HeliBars bonded into cut slots with HeliBond grout for a quick, simple, effective and permanent solution.

Cracked masonry is best stabilised by bonding HeliBar stainless steel bars into appropriate bed joints or cut slots. Tensile loads are redistributed along the masonry to minimise further developments of the crack which may occur with simple injection methods.

Technical Details

  • Available diameters – 4.5, 6 and 8mm

  • Available in lengths of 1m, 1.5m and 2m

  • Material – Austenitic stainless steel

  • Vertical spacing – Every 4-6 brick courses (300-450mm)

  • Depth of slot – Single skin / cavity wall 25-35mm Solid masonry 25-40mm

System Components

  • 1m lengths of HeliBar

  • HeliBond cementitious grout

  • Mortar rake

  • Mixing paddle

  • Applicator with fitted applicator nozzle

Installation

Crack Stitching Installation 1.jpg

1. Rake out or cut slots into the horizontal mortar beds, a minimum of 500mm either side of the crack, to the specified depth.

Crack Stitching Installation 2.jpg

2. Clean out slots and flush with clean water and thoroughly soak the substrate within the slot.

Crack Stitching Installation 3.jpg

3. Using the CS Pointing Gun Kit, inject a bead of HeliBond to the back of the slot.

Crack Stitching Installation 4.jpg

4. Using the HeliBar Insertion Tool, push the HeliBar into the grout to obtain good coverage.

Crack Stitching Installation 5.jpg

5. Insert a further bead of HeliBond over the exposed HeliBar, finishing 12mm from the face, and ‘iron’ firmly into the slot using the HeliBar Insertion Tool.

Crack Stitching Installation 6.jpg

6. Re-point the mortar bed and make good the vertical crack with Crackbond TE.

Repairing Cracks Near Corners & Openings

Crack stitching near to corners and openings.jpg

Where cracks are less than 500mm from an external corner or an opening, for example a window, at least 100mm should be bent around the corner and bonded into the return wall or bent and fixed into the reveal, avoiding any DPC membrane.

Where two or more cracks are close together these may be stitched using one continuous length of HeliBar which must be long enough to extend 500mm beyond the outer cracks. e.g. if there are three cracks, each 250mm apart, then the overall length of HeliBar required would be 1.5m.

The horizontal slot, normally the mortar bed, can be cut using a twin diamond blade chaser with vacuum attachment, an angle grinder or a mortar chisel.

All mortar must be removed, together with any loose debris, to ensure a sound bond. Prepare the slot with HeliPrimer WB or thoroughly wet the slot with clean water.

As standard, slots should be 10mm wide to accommodate the 6mm diameter HeliBar.

HeliBond grout is the recommended bonding agent. PolyPlus resin is used for smaller jobs and where loads are to be rapidly applied.

Additional Advice

  • Where two or more cracks are close together these may be stitched using one continuous length of HeliBar which must be long enough to extend 500mm beyond the outer cracks. e.g. if there are three cracks, each 250mm apart, then the overall length of HeliBar required would be 1.5m.

  • The horizontal slot, normally the mortar bed, can be cut using a twin diamond blade chaser with vacuum attachment, an angle grinder or a mortar chisel.

  • All mortar must be removed, together with any loose debris, to ensure a sound bond.

  • Prepare the slot with HeliPrimer WB or thoroughly wet the slot with clean water.

  • As standard, slots should be 10mm wide to accommodate the 6mm diameter HeliBar.

  • HeliBond grout is the recommended bonding agent. PolyPlus resin is used for smaller jobs and where loads are to be rapidly applied.

 
function startup() { colorWell = document.querySelector("#colorWell"); colorWell.value = defaultColor; colorWell.addEventListener("input", updateFirst, false); colorWell.addEventListener("change", updateAll, false); colorWell.select();