L-shaped sheetmetal anchor with tubular leg and anchoring assembly

Abstract

An L-shaped sheetmetal anchor with tubular leg and an anchoring assembly employing the same are disclosed. The assembly is adaptable to varied anchoring structures and for use with interlocking veneer ties and reinforcement wires to provide a high-strength surface mounted anchoring system for cavity walls. The stepped cylinders sheath the mounting hardware to limit insulation tearing and resultant loss of insulation integrity. The assembly is thermally-isolated through the use of a series of strategically placed compressible nonconductive fittings. The assemblies are vertically or horizontally surface mounted on the inner wythe.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]This invention provides an L-shaped sheet metal anchor and anchoring assembly having a sealing, protective, and thermally-isolating tubular leg for surface mounting on the inner wythe of a cavity wall and an interengaging veneer tie to positively interconnect the inner and outer wythes. The assembly has application to seismic-resistant structures and to cavity walls having special requirements. The latter include high-strength requirements for both insulated and non-insulated cavities, namely, a structural performance characteristic capable of withstanding a 100 lbf, in both tension and compression.[0003]2. Description of the Prior Art[0004]In the late 1980's, surface-mounted wall anchors were developed by Hohmann & Barnard, Inc., now a unit of MiTEK-Berkshire Hathaway Corporation, and patented under U.S. Pat. No. 4,598,518. The invention was commercialized under trademarks DW-10®, DW-10-X®, and DW-10-HS®. These widely ...

AI Technical Summary

Benefits of technology

The present invention provides a thermally-isolating anchoring system that can withstand high levels of tension and compression, and is designed to prevent disengagement under seismic or severe environmental conditions. The system includes a shaftway that protects the insulation during installation. The anchoring system utilizes seals and has only point contact with metal studs, which restricts thermal conductivity.

Problems solved by technology

However, under certain conditions, the system did not sufficiently maintain the integrity of the insulation.

Besides earthquake protection, the failure of several high-rise buildings to withstand wind and other lateral forces resulted in the incorporation of a continuous wire reinforcement requirement in the Uniform Building Code provisions.

In general, the pintle-receiving sheetmetal version of the Seismiclip® interlock system served well, but in addition to the insulation integrity problem, installations were hampered by mortar buildup interfering with pintle leg insertion.

This resulted, upon experiencing lateral forces over time, in the loosening of the stud.

While the gapping was largely resolved by placing a self-sealing, dual-barrier polymeric membrane at the site of the legs and the mounting hardware, with increasing thickness in insulation, this patchwork became less desirable.

However, as there is no thermal break, a concomitant loss of the insulative integrity results.

In the past, the use of wire formatives have been limited by the mortar layer thicknesses which, in turn are dictated either by the new building specifications or by pre-existing conditions, e.g. matching during renovations or additions in the existing mortar layer thickness.

On the other hand, contractors find that heavy wire anchors, with diameters approaching the mortar layer height specification, frequently result in misalignment.

However, the above-described technology did not address the adaption thereof to surface mounted devices or stud-type devices.

Nor does it address the need to thermally-isolate the wall anchor.

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