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Corrosion protection inserts for metallic construction supports

Inactive Publication Date: 2008-10-23
CLARIZIA ALBERT J +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]Therefore, an object of the present invention is to provide an insert for use with metallic construction supports such as joist hangars, hurricane straps and post supports which provide a barrier preventing the leeching of chemicals and moisture from treated wood to the supports.
[0009]Another object of the present invention is to provide an insert for use with metallic construction supports that provides electrical insulation between treated lumber and the support to reduce galvanic corrosion.
[0010]Another object of the present invention is to provide an insert for use with metallic construction supports that can be installed quickly and at low cost.

Problems solved by technology

Supports used with lumber, especially exterior treated lumber are susceptible to corrosion due to moisture and corrosive chemicals often used to prevent rot and deterioration of the lumber.
Moisture causes chemical compounds in the lumber to leach, further compounding the problem.
Although stainless steel reduces the corrosion due to chemical and galvanic attack, it is expensive and requires use of stainless steel fasteners such as screws and nails in order to be effective.
Such galvanic corrosion-protection measures have been effective in the past, but are insufficient for new lumber treatments that include use of high metallic compound formulation, as well as corrosive biocides and fungicides.
The membrane must be applied to all wood surfaces in contact with the galvanized supports, requiring considerable time for fitting the membrane.

Method used

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  • Corrosion protection inserts for metallic construction supports
  • Corrosion protection inserts for metallic construction supports
  • Corrosion protection inserts for metallic construction supports

Examples

Experimental program
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embodiment 701

[0041]FIGS. 7-9 are plan view and front and side elevation drawings, respectively of alternative embodiment 701 of joist hangar insert 101 for accommodating varying joist and joist hangar widths. Joint hangar insert 701 utilizes a slot 703 for providing additional adjustment of width 109 or 111 depending on the width of a joist such as joist 403 of FIG. 4. Slot 703 also allows an interference fit for inserting and retaining insert 701 in a joist hangar. Slot 703 may be a vertical through slot as shown in the figure, or it may extend only part way of the longitudinal height 117 of the insert. Slot 703 also provides a means to accommodate varying widths of the joist without utilizing different inserts. Slot 703 may also extend partially through bottom portion 107 to add additional flexibility to width adjustments.

[0042]In other embodiments, insert side portion joining strips 706, shown in dotted lines in the FIGS. 7-8, attach respective side portions 701A, 701B at a distance represent...

embodiment 1801

[0054]FIG. 18 is an alternative embodiment 1801 of the coated strap 1703 of FIG. 16 having a coating 1807 covering only a portion of strap 1703. In the preferred embodiments, coating 1807 covers only the portions of the strap which contact treated lumber, and optionally, the interior portions of nail holes 1705. Partial coating of strap 1703 reduces cost and weight of the strap. Partial coating also allows spray and brushing application techniques for manufacture. Although a hurricane strap is shown in FIGS. 17 and 18, the methods and structure of this invention may be applied to any metallic structural component such as joist hangars, post supports, and other metallic straps, supports and hangars used in the art.

[0055]Still other embodiments of the invention utilize addition of structural, corrosion inhibitor or biological inhibitor fillers to the resins used in the coatings of FIGS. 17 and 18. For example, conductive fillers having high anodic potential may be added to the resins ...

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Abstract

An insert for construction supports such as joist hangars and hurricane straps provides corrosion protection from chemicals and moisture in exterior construction lumber. The insert is a semi-rigid body having a shape that fits the construction support so that surfaces of the insert are disposed between the support and the construction lumber at joints in the construction. In the preferred embodiments, the inserts are made of a plastic material and provide a chemical, moisture and electrical barrier between the support and exterior lumber elements of a structure.

Description

[0001]This application claims the benefit of U.S. Provisional Application No. 60 / 925,740 filed Apr. 23, 2007.FIELD OF THE INVENTION[0002]The present invention relates to corrosion protection for metallic supports used in exterior treated wood construction, and more particularity, for protective inserts used with galvanized steel hangars, straps, brackets and supports.BACKGROUND OF THE INVENTION[0003]Steel hangars, straps, brackets and other reinforcing supports are often used in exterior and interior construction because of the increased strength, rigidity and safety these supports add to the structure. Supports used with lumber, especially exterior treated lumber are susceptible to corrosion due to moisture and corrosive chemicals often used to prevent rot and deterioration of the lumber.[0004]Lumber treatment often utilizes metallic compounds, as well as acidic or caustic compounds, which can react chemically or electrically through galvanic corrosion to attack and degrade the ste...

Claims

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Application Information

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IPC IPC(8): E04B1/64E04B5/00E04C5/18
CPCE04B1/2612E04B5/12
Inventor CLARIZIA, ALBERT J.GALLOWAY, WILLAIM F.
Owner CLARIZIA ALBERT J
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