Static structures (e.g. – buildings) – Assembled in situ-type anchor or tie – Sheet or wire tie
Reexamination Certificate
1998-12-17
2001-04-03
Stephan, Beth A. (Department: 3635)
Static structures (e.g., buildings)
Assembled in situ-type anchor or tie
Sheet or wire tie
C052S379000, C052S562000, C052S713000
Reexamination Certificate
active
06209281
ABSTRACT:
The present invention relates to masonry anchor members for tying a masonry veneer to a stud back-up in a cavity wall and more particularly to the provisions of anchor members which can be quickly installed to project at precisely the right distance from the back-up stud while requiring substantially less material than conventional anchor members, and still more particularly to anchor members as aforesaid which will not be subject to or will have a greatly increased resistance to corrosion.
BACKGROUND OF THE INVENTION
Cavity walls of a masonry veneer tied to a backup wall are commonly utilized in construction to provide for an aesthetically pleasing appearance while being less expensive than solid masonry walls. One common type of cavity wall used in both residential and commercial buildings is a brick veneer tied to a stud back-up wall.
The brick veneer is tied to the stud back-up wall by use of masonry or brick veneer anchors. Such anchors are generally a planar anchor plate which is attached to the stud of the stud back-up wall. The anchor plate at the exposed end is provided with a slot through which a brick tie wire is inserted, the brick tie wire being mortared between two rows of bricks to provide a secure connection between the brick veneer and back-up wall. As there are a large quanitty of connectors required to secure the brick veneer their cost becomes a very critical factor. In the past, these connectors have been made of a galvanized carbon steel which is a material similar to that which is used in the construction of the metal studs for the stud back-up walls.
While it is highly desirable to provide for the proper location of the anchor plates so that the slotted exposed ends stand at the correct distance proud of the back-up wall, the commonly utilized means for effecting such location has necessitated added plate material increasing costs. As a result some anchor plates have eliminated any locating means and have to be set in position simply by sight giving rise to inaccurate tie wire embeddments. In addition, there has recently been serious concern expressed by a number of agencies regarding the potential for corrosion and failure of the masonry anchors due to the exposure of the anchors to moisture which is present in the cavity between the stud back-up wall and the masonry veneer.
One widely used example of a connector which provides for accurate presentation of the slotted exposed end of the anchor plate is an L-shaped connector plate with the base of the “L” fitting over the face edge of the stud and the leg of the “L” being connected to the main part of the stud and having a slot for a brick tie wire in a nose portion of the plate extending beyond the front edge of the stud. By constructing the anchor in such a shape, various sizes of anchors for various sizes of studs, such as “4”, “6” and “8” inch studs, may be constructed. While such an anchor plate is hugely successful, it requires a significant quantity of material which increases with stud size giving rise to increasing costs.
SUMMARY OF THE INVENTION
The present invention in one aspect provides for an anchor member for an anchor tie for tying courses of masonry veneer to a backup wall of sheet material supported by spaced vertical studs which anchor members can be easily installed to project at precisely the right distance from the back-up wall while requiring substantially less material than conventioanl anchor members.
In another aspect, the invention provides for an anchor plate as aforesaid which utilizing the reduced material requirement of the invention augment by the increased strength of stainless steel adding to the size reduction, can be economically made of stainless steel to compete with conventional anchors having locating means thereby eliminating the problems of anchor plate corrosion.
More particularly, the anchor plate or member of the invention, which to take full advantage of the invention is formed of stainless steel, has a nose portion adapted to be projected through a vertical slit in a backup wall sheet material, and an anchor portion to extend rearwardly of the sheet material and to be secured to a stud supporting the sheet material.
The nose portion of the anchor plate which has a tie wire slot formed therein, has a maximum vertical dimension for maximum adjustability such that the length of the tie wire slot is not greater than approximately the height of a veneer course. The horizontal dimension of the nose portion is sufficient to present the tie wire slot standing proud of the backup wall sheet material at precisely the desired distance when the anchor plate is installed.
The anchor portion of the anchor plate has a maximum horizontal dimension not greater than approximately one-half of the width of the smallest studs usually encountered in back-up walls. The anchor portion of the plate is provided with a locating abutment means projecting perpendicular thereto to engage a backup wall surface to fix the projection of said anchor nose portion beyond the backup wall sheet material at precisely the desired distance.
In another aspect, in a preferred form the present invention provides for an anchor member comprising a generally planar anchor plate having an outer coupling nose or end for connection to a veneer tie wire and an inner anchoring portion or end for securement to the back-up wall. The anchor plate has struck-out tabs extending laterally thereof intermediate the coupling end and the anchoring end. The outer coupling end is insertable through a slot cut through the back-up wall insulating sheet material adjacent a supporting stud until the tabs engage the inner face of the sheet material to provide for proper spacing of the coupling end from the back-up wall.
In still another aspect, the invention provides for a tool engaging ledge arrangement struck out from the anchoring end of the anchor plate whereby the plate can be held with a tool such as a screwdriver inserted beneath the ledge arrangement when it is being fastened to a stud.
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patent: 5816008 (1998-10-01), Hohmann
patent: 5893254 (1999-04-01), Troiani
Bailey Metal Products Limited
Stephan Beth A.
LandOfFree
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