HELIFIX TIES PDF

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Remedial Wall Ties Remedial Wall Ties It happens occasionally on a job site, veneer ties inadvertently get left out of the wall during construction or some of the wall ties are fastened to the exterior sheathing and not the wood or metal studs as building code requires.

Occasionally we run across existing projects where missing or damaged ties are causing a problem such as bowing of the veneer or there is poor connectivity between wythes in older multi-wythe masonry. Rather than taking down a veneer and reinstalling it or rebuilding a multi-wythe masonry wall, there are readily available solutions from a number of manufacturers. Installation of helical ties in a stone veneer. The pilot hole is being drilled in the upper bed jointand a helical tie is being installed in the lower mortar joint.

This type of tie is formed from stainless steel straps that are twisted to make a self-tapping tie. A pilot hole is first drilled through a mortar joint in the veneer and into the backup or, in multi-wythe masonry walls, the pilot hole is drilled through the poorly bonded wythe and into one or more of the adjacent wythes.

The tie is then driven in, using a hammer drill and a product specific driver that will slightly recess the tie below the surface. The resulting small hole is then pointed over with matching mortar, making the repair nearly invisible.

The advantage of this type of remedial anchor is that they are quick to install and are relatively inexpensive. However, if the backup is stud construction, determining the stud layout can be time consuming. Locating the studs is necessary as building codes require that the helical ties, used to anchor a veneer, penetrate the wood or steel studs of the backup.

Pullout tests can be done on the ties to derive allowable design loads or verify that design values are being achieved. Single expansion ties are intended for stud backup systems and consist of either a lag screw for wood studs or a self-tapping metal screw for steel studs that are attached to a threaded expansion anchor that expands within the veneer.

A pilot hole is first drilled through a mortar joint in the veneer. Once the tie has been driven into the stud, the outer plug is expanded by a special driver securing the expansion anchor within the veneer. Double expansion anchors are intended for use with concrete, CMU or clay tile backup and have two expansion anchors on the same threaded shaft.

A pilot hole is drilled through a mortar joint and into the backup for a specified depth. Installation tools are used to first expand the expansion anchor within the backup and then expand the anchor within the veneer. Both anchors are torqued to a specified value to achieve the design load capacity.

In some instances, pull testing may be required to establish the design load capacity. Similarly with older multi-wythe masonry, remedial ties can supplement the lack of headers or provide additional bond where diagonal hidden headers are used.

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Remedial Wall Ties Remedial Wall Ties It happens occasionally on a job site, veneer ties inadvertently get left out of the wall during construction or some of the wall ties are fastened to the exterior sheathing and not the wood or metal studs as building code requires. Occasionally we run across existing projects where missing or damaged ties are causing a problem such as bowing of the veneer or there is poor connectivity between wythes in older multi-wythe masonry. Rather than taking down a veneer and reinstalling it or rebuilding a multi-wythe masonry wall, there are readily available solutions from a number of manufacturers. Installation of helical ties in a stone veneer. The pilot hole is being drilled in the upper bed jointand a helical tie is being installed in the lower mortar joint.

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Contact Us BowTie Stabilise a bowed wall by tying back to internal timbers, securely and effectively. Helifix products and their concealed, non-disruptive, installation techniques play an important role in preserving our built environment, from housing, offices, factories and bridges to churches, listed buildings and heritage structures. Wherever possible, repair and refurbishment is increasingly seen as a more sustainable option than demolition in terms of architectural value, materials usage, overall cost and environmental impact. With an enviable reputation for product quality, engineering excellence and comprehensive customer service, Helifix has considerable experience and technical expertise. It prides itself on possessing the necessary in-house skills to undertake all aspects of any project including advice and support, on-site back-up and high quality designed repairs using innovative, non-disruptive, concealed installation techniques.

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Helix Fixings: Provider and Installer of Quality Masonry Bars and Ties

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