HELIFIX STRESS FREE STRUCTURAL SOLUTIONS14

DryFix

Dry mechanical pinning and remedial tying system

■ Patented remedial tying system■ Self-tapping, secure, stress-free fixing■ Requires no resin, grout or mechanical

expansion■ Slim, one-piece, grade 316 stainless

steel tie■ Extremely quick and easy to install ■ Effective in bricks, blocks, concrete,

hard mortar, timber■ Effective in cavity and solid walls,

hollow materials and close to edges■ Usable in all weathers, temperatures

and environments

FEATURES

■ Replacement wall tie■ For securing multiple layers of masonry■ For pinning delicate masonry features

APPLICATIONS

■ Highly economical with lowinstalled costs

■ Great tensile strength ■ Flexibility accommodates normal

building movement■ Multiple drip points prevent transfer of

water across cavity■ Can be installed through insulation

without affecting its thermalperformance

■ Leaves masonry virtually unmarked■ Minimal inconvenience to occupants

BENEFITS

BONDING AGENT

INSTALLATION

■ None required

REFERENCE Page 44

DryFix

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

1

Load tie into DryFix Power Driver Attachment fittedto SDS hammer drill.

2

Drive in tie until outer end is fully recessed belowface of masonry.

3

Make good.4

HELIFIX STRESS FREE STRUCTURAL SOLUTIONS 15

DryFix

HELIFIX STRESS FREE STRUCTURAL SOLUTIONS

Terracotta Tie

INSTALLATION

TYPICAL APPLICATIONS

DryFix

A small pilot hole isdrilled through theterracotta and into thebackup material, to apredetermined depth,using a rotarypercussion drill(3-jaw-chuck-type)The tie is power driven

into position (withSDS hammer drill)until the outer end ofthe tie is recessedbelow the face of theterracotta by thespecial insertion tool

The patented DryFix system provides an effective and economicalstress-free connection between all commonly used building materialsin cavity and solid masonry constructions without needing any grouts,resins or mechanical expansion.

The DryFix Terracotta Tie was developedspecifically to secure fragile terracotta facingsand delicate decorations and features which havebecome loose or are suffering from stressfractures.

It has an 8mm diameter over the majority of itslength with a short 10mm section at one end togrip the soft terracotta without enlarging thepilot hole. It is installed in the same manneras standard DryFix ties to provide arapid, reliable and concealed solution.

A. Fine Terracottato Masonry

B. Brick toClay Tile

D. Brick toConcreteBlock

E. Brick toConcrete Block(Mortar Jointor Solid Brick)

F. Brick Multi Leaves(Plan)

F. Brick MultiLeaves(Section)

H. Brick to WoodStud (Plan)(Mortar Jointor Solid Brick)

NOTE: In many situations ties may be installedfrom inside the building if circumstancesdemand.

H. Brick to WoodStud (Section)(Mortar Joint or Solid Brick)

I. Brick toSteel Stud(Plan).InteriorInstallation

J. Stone, Marble or GranitePanels toConcrete

I. Brick to SteelStud (Section).InteriorInstallation

G. Repairing Limestone/ Sandstoneor Brick Arches and Lintels

C. Brick toConcrete (Mortar Jointor Solid Brick)

■ Does not stress or fracture fragile substrates■ Requires only a small diameter pilot hole■ Easy to install and fully concealed■ No chemicals or expansion devices■ Withstands cyclic loading■ Accommodates differential movement ■ Usable in all weathers and temperatures

FEATURES AND BENEFITS

HELIFIX STRESS FREE STRUCTURAL SOLUTIONS16

DryFix

Drill a small pilot holethrough the render andinto the backup materialto the pre-determineddepth using a rotarypercussion drill (3-jaw-chuck type). Load the tieinto the special insertiontool (fitted to an SDS hammer drill) and drive it into positionuntil the outer end is recessed below the outer face

■ For both new build and remedial upgrade tomeet current seismic requirements andrestore structural performance

APPLICATIONS

Render Pinning Special short versions of DryFix areavailable for re-pinning separated,unstable and potentially dangerousloose render. This situation isparticularly prevalent throughout SEAsia where buildings are often coatedwith a hard render, keyed to the back-upmaterial by means of a splatter dashapplication, which is then painted orcovered with small tiles to achieve awaterproof finish.Typically the render is 20-65mm thickbut this can vary greatly between 12mmand 80mm. Breakdown of the bondbetween the render and back-upmaterial can occur for various reasonsbut once delaminated it is likely tobecome increasingly unstable, resultingin cracks and bulges. These in turnencourage water penetration while windloads tend to loosen the render even

further. Mosaic tile finishes can easilybecome loose and fall away.Installed in the same way as standardDryFix ties, re-pinning is a far simpler andmore cost-effective method of stabilisingthe render than traditional solutions suchas hacking off and re-rendering orchemical anchoring with large pins.(See 1998 report by Frank Jones)

Seismic connector

The DryFix system is used in conjunction with aspecial patented connector fitted to the tie end andconnected laterally with HeliBar 45 stainless steelwire. In new build constructions these are installed asthe outer leaf is constructed while in remedialsituations the DryFix ties are installed, in the standardmanner, through the ‘T’ joint of the outer leaf mortar,the seismic connectors fitted and then threadedtogether with wire in the channelled out mortar jointand grouted in place.Most methods are designed for new construction onlyand are very disruptive in remedial situations, oftenrequiring masonry to be dismantled and rebuilt. This isnot the case with the Helifix system which is the onlypositive lock seismic connector with easy overlap forlong runs.

DryFix

INSTALLATION

■ Simple and straightforward to install■ Easily tested for security of fixing in back-up

material■ Non-disruptive - requires no taking down

and rebuilding■ Strong, stress-free connection with back-up

material■ Additional strength created in outer leaf■ Positive lock with easy overlap for long runs■ Fully concealed and visually sympathetic

FEATURES AND BENEFITS