US20130042547A1 - Apparatus and Method for Protecting In-Ground Wood - Google Patents
Apparatus and Method for Protecting In-Ground Wood Download PDFInfo
- Publication number
- US20130042547A1 US20130042547A1 US13/214,171 US201113214171A US2013042547A1 US 20130042547 A1 US20130042547 A1 US 20130042547A1 US 201113214171 A US201113214171 A US 201113214171A US 2013042547 A1 US2013042547 A1 US 2013042547A1
- Authority
- US
- United States
- Prior art keywords
- post
- collar
- sleeve
- spaced apart
- ground level
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/12—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members
- E04C3/125—End caps therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/22—Sockets or holders for poles or posts
- E04H12/2292—Holders used for protection, repair or reinforcement of the post or pole
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
- E04H17/20—Posts therefor
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Building Environments (AREA)
Abstract
An apparatus and method for decreasing rot and insect damage to in-ground wood increases the effective life of the wood. The combination of a waterproof sleeve that covers the in-ground portion of the wood, and a collar surrounding the wood above the ground, defines a barrier system that prevents microbes and insects from gaining access to the wood and prevents leaching of chemical preservatives and the like from the wood into the soil.
Description
- The present invention relates to an apparatus and method for decreasing rot and insect damage to in-ground wood and thereby increasing the effective life of the wood, and more specifically relates to a barrier system for in-ground wood that prevents microbes and insects from gaining access to the wood and prevents leaching of chemical preservatives and the like from the wood into the soil.
- Wooden poles of a variety of descriptions are sunk into the ground for use as supports. Examples include posts for fencing, supports for decking and other structures, and utility poles. Wooden poles are used as fence posts for many different styles of fences because they are both highly functional and often very attractive. Although there are many techniques for building fencing using wooden posts, in a typically situation the post is sunk into the ground, typically in a pre-drilled or pre-dug hole, which is then filled in with soil, gravel or concrete. Some type of railing is then attached to the poles to complete the fencing.
- The effective life of in-ground wood such as a wooden fence post depends on a variety of factors, including for instance the species of wood that is used, the soil conditions including the amount of moisture in the soil and the composition of the soil—microbial-caused caused decomposition of wood fiber eventually results in rot and insect damage can further weaken the posts. While some species of wood such as some types of cedar are notoriously long-lasting as fencing posts, all in-ground wood will eventually decompose and the post will therefore fail and need to be replaced. In some areas where there is significant moisture in the ground, wooden fence posts can fail in a matter of years from the combination of bacterial and other microbial decomposition of the wood and insect damage.
- Treated wooden fencing has significantly improved the longevity of in-ground wooden posts. Treating wooden posts involves applying preservatives of various types to the wood so that microbial and insect degradation of the wood fibers is slowed or stopped. Treatments can include simple application of liquid preservatives, and more complicated processes that involve applying preservatives to the wood under pressure so that the preservatives penetrate into the wood.
- Regardless of the way in which the wood is treated, the preservatives that are used often contain dangerous and toxic chemicals that could be harmful to health, or at least raise questions about their proper use in the environment. When pressure treated wood is used for in-ground applications such as fence posts, some of the chemicals used as preservatives can leach into the soil and the United States Environmental Protection Agency recommends that wood treated with the commonly used preservative chromated copper arsenate (“CCA”) should not be used in proximity to edible plants.
- For these and a variety of other reasons, more and more consumers are questioning use of products that add such toxins to the soil and are therefore seeking out alternatives to use of treated wood. There is a need therefore for improved alternatives for use of wood for in-ground posts.
- The present invention provides an apparatus and method for overcoming the problems of rapid wood decay and possible leaching of toxic compounds into the soil from treated wood products. The invention facilitates improved longevity of in-ground wood and even in circumstances where treated wood is used, the present invention prevents leaching of toxic compounds from the in-ground portion of the wood into the soil.
- The invention is defined by a waterproof sleeve that surrounds the post below ground level and extends to a level just above ground level, and a collar that surrounds the post where it emerges from the ground. The sleeve defines a barrier between the post and surrounding soil that prevents migration of water across the barrier, and prevents microbes in the soil from exposure to the wood and associated decomposition, and prevents insects from gaining access to the wood. The collar is designed to encircle the post at the ground level and to surround the upper portion of the sleeve. The collar prevents moisture and debris from entering the sleeve, yet allows for evaporation of moisture from the sleeve and from within the interior of the collar.
- The invention will be better understood and its numerous objects and advantages will be apparent by reference to the following detailed description of the invention when taken in conjunction with the following drawings.
-
FIG. 1 is an elevational and partial cross sectional view of an exemplary in-ground fence post illustrating the sleeve and collar according to the present invention. -
FIG. 2 is a perspective view of an illustrated embodiment of the collar according to the present invention. -
FIG. 3 is a perspective view of a section of the collar illustrated inFIG. 2 . -
FIG. 4 is an end elevation view of the collar shown inFIG. 3 . -
FIG. 5 is a cross sectional view taken along the line 5-5 ofFIG. 3 , and including a band that secures the collar to the post. - A first illustrated embodiment of an
apparatus 10 for protecting in-ground wood according to the present invention is illustrated inFIGS. 1 through 5 . As noted previously, theapparatus 10 according to the present invention comprises asleeve 12 and acollar 14, both of which surround a fence post, which is identified herein withreference number 16. Relative directional terms are used at times to describe parts of the invention and relative positions of the parts. As a naming convention, the ground plane is considered to be the surface of the ground (reference number 18) and, for purposes herein, is considered to be horizontal although of course in use the ground plane has slope and irregularities. Other relative directional terms correspond to this convention: “upper” refers to the direction above and away from the ground plane; “lower” is generally in the opposite direction, and so on. - The invention is described with reference to use of the invention with an in-ground fence post. It will nonetheless be appreciated that the invention is not limited to use with fence posts but instead may be used with any type and size of in-ground wood, such as deck supports, telephone and utility poles, and the like. The posts may have any cross sectional configuration, such as square, round, or irregular.
- Sleeve 12 defines a waterproof casing that encloses the
post 14 where the post is below theground level 18—dimension C,FIG. 1 . Thesleeve 12 is preferably a plastic material such as polyethylene that is formed with a size and shape that corresponds to the shape of the post. The sleeve has aside wall portion 20 that extends vertically along the sides ofpost 16, abottom portion 22 that lies below the bottom of the post, and anopen top 24 through which thepost 16 is inserted—the sleeve is essentially a bag that covers and contains that portion of the post that is below the level of the ground. Thesleeve 12 may be formed as a cylinder or any other shape so long as the sleeve is large enough in interior diameter that thepost 16 may be inserted into the sleeve. The sleeve fits relatively loosely around the post—as detailed below, when the post is sunk into a post hole in the ground and the hole is in-filled with soil 26 (or other appropriate fill material, including for example crushed gravel, concrete, etc.), the sleeve conforms fairly closely to the post because thesoil 26 compresses thesleeve 12 against thepost 16. - There are numerous plastic compounds that are appropriate for
sleeve 12, including as noted polyethylene; other polymers will work suitably well, too. The polyethylene may include compounds that enhance the stability of the sleeve over long periods of time and exposure to moisture in the ground and to conditions existing in subsurface conditions. The material used forsleeve 12 should be thick enough to be puncture and tear resistant in use; a standard thickness of about 6 mil has been found to be effective although the thickness may vary as appropriate. Importantly, the sleeve must be wholly intact at all points where the sleeve encases the post in the ground in order to define a waterproof barrier around the post. The length of the sleeve extending between thebottom portion 22 and theopen top 24 is sufficient that the sleeve extends a slight distance aboveground level 18 when thepost 16 is in the ground. -
Collar 14 defines a length of collar material that surroundspost 16 immediately aboveground level 18 and which is attached to the post and encircles the open top ofsleeve 12 to prevent moisture and debris from entering the open top of the sleeve. As detailed below, thecollar 14 is designed to allow evaporation of moisture from the interior of thesleeve 12, prevent UV radiation from impinging on thesleeve 12, and prevent water and other debris from entering the sleeve. As shown inFIGS. 2 through 5 ,collar 14 is defined by a length of material that is wrapped around thepost 16—the lineal length ofcollar 14 is roughly equal to the circumference aroundpost 16 where the collar surrounds the post. - Beginning with the
lowermost edge 30 ofcollar 14, which generally rests on or adjacent to the surface ofground 18 in the assembled apparatus (FIG. 1 ), avertical sidewall portion 32 extends upwardly to an inwardly and upwardly slopingedge section 34. The slopingedge section 34 defines a stand-off so that thevertical sidewall portion 32 is spaced apart from thepost 16, as detailed below. Immediately adjacentsloping edge section 34 is avertical sidewall section 36 that defines a seat for the connecting band that attaches thecollar 14 to the post.Vertical sidewall section 36 includes a thickenededge portion 38 at the junction between thevertical section 36 and thesloping edge section 34, and an outwardly projectinglip 40 at the upper extent of thevertical section 36. The combined thickenedsection 38 and upper outwardly projectinglip 40 at opposite sides of thevertical section 36 effectively define acircumferential groove 42 around which the connecting band extends. Abovevertical section 36 and outwardly projectinglip 40 is a second inwardly and upwardly sloping section, referred to herein assealing section 44. As detailed below,sealing section 44 defines a seal betweencollar 14 and thepost 16 in the assembled product. - For reference purposes, the exterior surface of
collar 14 is identified in the drawings withreference number 46—theexterior surface 46 is exposed to the elements when the collar is in place around apost 16. The opposite surface ofcollar 14, that is, the surface that facespost 16 is identified asinterior surface 48. An upwardly and inwardly slopinglip 50 is formed oninterior surface 48 ofcollar 14 below and adjacent to the junction between thevertical sidewall section 32 and the slopingedge section 34.Plural vent openings 52 are formed incollar 14 abovelip 50 and below the junction between thevertical sidewall section 32 and thesloping edge section 34. -
Collar 14 is formed from a flexible, malleable material that is waterproof and resistant to degradation from ultraviolet radiation. A thermoplastic elastomer sold under the brand name SANTOPRENE is one material that has found to exhibit good properties for use incollar 14. While a variety of colors may be used forcollar 14, the preferred color is black. The collar is provided in an extruded roll and the collar is cut to an appropriate length by the installer; the lineal length of thecollar 14 as used with apost 16 is the same as or slightly greater than the circumference of the post where the collar surrounds the post just above the level ofground 18, as shown inFIG. 1 . - With specific reference to
FIG. 4 , preferred but exemplary specifications forcollar 14 are detailed, although it will be understood that the size, shape and form of the collar may be varied as required in any given installation. The overall height ofcollar 14 is represented as dimension A, and is preferably approximately 3½ inches.Seal 44 is angled at about a 69 degree angle from thevertical sidewall 32, andlip 50 is angled at about a 45 degree angle from thevertical sidewall 32. The thickness of the collar between the junction between thevertical sidewall section 32 and thesloping edge section 34 and extending upwardly to the outwardly projecting lip is slightly greater than the thickness of the collar below the junction between thevertical sidewall section 32 and thesloping edge section 34. This added thickness results in a slightly more rigid upper portion of the collar. - Returning to
FIG. 1 ,apparatus 10 is illustrated installed on apost 16. Initially, ahole 54 is dug in the ground with the appropriate diameter for thepost 16 that will be inserted into the hole, and at the proper depth. Thepost 16 is then inserted into theopen top 24 of an appropriatelysized sleeve 12 and the sleeve is pulled onto the post until the bottom of the sleeve rests against the bottom of the post. The sleeve-covered post is then inserted into thehole 54. The edge of thesleeve 12 at the open top 24 should extend above the level ofground 18 by several inches. If the sleeve is too long it may be trimmed to the proper length. A properlysized sleeve 12 is slightly larger in diameter than past 12 so the sleeve does not fit tightly to the irregular contours of the post. Fill material such assoil 26 is then filled into thepost hole 54 and thepost 16 is adjusted to the desired orientation relative to the ground, typically vertically oriented. - The circumference of
post 12 immediately above the level ofground 18 is then measured and a length ofcollar 14 is cut to the length of the circumference, or slightly greater. This is best shown inFIG. 2 where the length ofcollar 12 has opposite ends 56 and 58. Thecollar 12 is then wrapped around thepost 16 and the portion ofsleeve 12 that extends above ground level, as seen inFIG. 1 , with thebase 30 of the collar resting on or adjacent to the surface ofground 18. The collar is then pulled snug around thepole 16 and theends fastener 60 is then wrapped around the collar atcircumferential groove 42 betweenedge 38 andlip 40 and is tightened in place. There are numerous types of fasteners that will work forfastener 60. InFIG. 1 ,fastener 60 is a standard hose clamp of the type having a screw-driven worm gear. Other suitable fasteners include conventional nylon cable ties and zip ties, lap joint clamps, etc. Thefastener 60 is tightened around thecollar 14 and thepost 16 to hold the collar securely in place on the post. - As an alternative method of attaching
collar 14 to post 16, the opposite ends 56 and 58 of the collar may be tacked or stapled to the underlying post and thefastener 60 may be omitted. - As best illustrated in
FIG. 5 , when thecollar 14 is secured in place onpost 16 with afastener 60, the inwardly projectingseal 44 at the upper edge of the collar is deflected upwardly so that theinterior surface 62 of theseal 44 rests flush against the surface of thepost 16. In addition, the interior surface of the collar oppositefastener 60 lies flush against the surface of the post with the fastener compressing the collar material against the post. All wooden posts will have irregularities in their outer surfaces. However, because thecollar 14 is malleable and flexible, the combination of the collar-to-post contact atseal 44 and the collar-to-post contact beneath thefastener 60, the collar effectively seals around the post at the upper end of the collar. - Immediately below
edge 38, thecollar 14 diverges outwardly away frompost 16 at slopingedge section 34. Again as best seen inFIG. 1 , thecollar 14 is thus spaced apart frompost 16 belowedge 38 to define aspace 62 that extends completely to the level ofground 18. The portion ofsleeve 12 that extends aboveground 18 is captured loosely withinspace 62.Inward lip 50 lies above the upper edge of open top 24 ofsleeve 12, but thelip 50 does not touch the outer surface ofpost 16 and is spaced apart from it.Sleeve 12 is not tightly conformed to post 16 where the sleeve is inspace 62. As such, there is aspace 66 between the sleeve and the post and a passageway is defined fromspace 66 over theopen top 24 ofsleeve 12,past lip 50 and through the plural holes 52.Passageway 66 includes theopen top 24 ofsleeve 12 and is schematically illustrated inFIG. 5 with arrow A. - Most wooden posts have some residual moisture that wicks away from the post and evaporates over time. The
passageway 66 thus allows water vapor that evaporates from the post, even in the portions of the post below the level ofground 18 to escape from the collar. External water such as rain and irrigation water cannot enterspace 62 throughholes 52 becauselip 50 is sloped upwardly (relative to the ground plane) and blocks water from entering the space. Moreover, thelip 50 effectively blocks UV radiation from hittingsleeve 12. This prevents degradation of the sleeve over extended periods of time. - The combination of
sleeve 12 andcollar 14 defines an effective apparatus and method for enhancing the life of in-ground wood. It will be appreciated by those of skill in the art that a variety of structural changes may be made to the sleeve and collar relative to the embodiments disclosed above without departing from the nature and scope of the invention. - While the present invention has been described in terms of preferred and illustrated embodiments, it will be appreciated by those of ordinary skill that the spirit and scope of the invention is not limited to those embodiments, but extend to the various modifications and equivalents as defined in the appended claims.
Claims (20)
1. Apparatus for use with wooden in-ground posts having a portion extending below ground level and a portion extending above ground level, comprising:
a waterproof sleeve surrounding the below ground portion of said post and a portion of said sleeve extending above the ground level;
a waterproof collar adapted for being wrapped around said post and having a lower edge on or adjacent to the ground level, an upper edge sealed against said post, and a lower section that is spaced apart from said post around said post, wherein said portion of said sleeve that extends above the ground level is contained in the lower portion of said collar that is spaced apart from said post.
2. The apparatus according to claim 1 including plural holes in said collar opening into said lower portion of said collar that is spaced apart from said post.
3. The apparatus according to claim 2 wherein said collar includes an interior wall that is spaced apart from said post, and including a lip formed on the interior wall below said plural holes.
4. The apparatus according to claim 3 wherein said lip has a distal end and the distal end is spaced apart from said post.
5. The apparatus according to claim 4 wherein said portion of said sleeve that extends above the ground level is contained in the lower portion of said collar that is spaced apart from said post, below said lip.
6. The apparatus according to claim 5 including a fluid flow path from the spaced apart portion past said lip and through said plural holes.
7. The apparatus according to claim 3 wherein said lip is positioned relative to said plural holes to block sunlight entering through said holes from impinging on said sleeve.
8. The apparatus according to claim 7 wherein said lip is position relative to said plural holes to prevent watering from entering the lower portion of said collar that is spaced apart from said post.
9. The apparatus according to claim 1 wherein said collar includes a circumferential seat between the upper edge and the lower portion and including a fastener extending around said collar in said circumferential seat.
10. The apparatus according to claim 1 wherein the collar defines a wall thickness and the wall thickness at the lower section is relatively less than the wall thickness at the upper edge.
11. Apparatus for use with wooden in-ground posts having a portion extending below ground level and a portion extending above ground level, comprising:
a waterproof sleeve adapted for surrounding the below ground portion of said post wherein a portion of said sleeve extends above the ground level to define a space between the post and said sleeve, said sleeve having an open top, a closed bottom and closed sidewalls, and a circumference greater than the circumference of the in-ground post;
a waterproof collar adapted to be wrapped around said post at the ground level and having a lower edge on or adjacent to the ground level, an upper edge sealed against said post, and a lower section that is spaced apart from said post around said post around the circumference thereof, wherein said portion of said sleeve that extends above the ground level is contained in the lower portion of said collar that is spaced apart from said post, and said waterproof collar defining a fluid flow path from the space between the post and the sleeve; and said waterproof collar including water and light blocking means for preventing water and light from outside of said collar from entering the space between the post and the sleeve.
12. The apparatus according to claim 11 wherein the fluid flow path from the space between the post and the sleeve is defined by plural holes in said collar opening into said lower portion of said collar that is spaced apart from said post.
13. The apparatus according to claim 12 wherein said light blocking means for preventing water and light from outside of said collar from entering the space between the post and the sleeve is defined by an interior wall that is spaced apart from said post with a lip formed on the interior wall below said plural holes and extending circumferentially around said collar.
14. The apparatus according to claim 13 wherein said lip has a distal end and the distal end is spaced apart from said post.
15. The apparatus according to claim 14 wherein said lip is positioned relative to said plural holes to block sunlight entering through said holes from impinging on said sleeve.
16. A method for use with a wooden in-ground post having a portion extending below ground level and a portion extending above ground level, for extending the effective life of said post, comprising the steps of:
a) forming a hole in the ground for receiving said post;
b) providing a post;
c) covering a lower portion of said post with a waterproof sleeve and inserting said post in said hole so that a portion of said waterproof sleeve extends above the ground level;
d) in-filling the hole;
e) wrapping a waterproof collar having opposite ends around said post so that a bottom edge of the collar is on or adjacent to ground level, mating the opposite ends of said collar and securing the collar to the post so that an upper portion of said collar is sealed against said post and a lower portion of said collar is spaced apart from said post, and wherein a portion of said waterproof sleeve that extends above the ground level is captured between the collar and the post in the spaced apart portion.
17. The method according to claim 16 including the step of providing holes in said collar in said spaced apart portion to define a fluid flow path from said post into said spaced apart portion and through said holes.
18. The method according to claim 16 of allowing moisture from said post to evaporate therefrom through the fluid flow path.
19. The method according to claim 18 including the step of blocking light and water from entering said spaced apart portion.
20. The method according to claim 16 wherein the step of securing the collar to the post includes the step of wrapping a tie around the upper portion of the collar and tightening the tie against the collar.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US13/214,171 US20130042547A1 (en) | 2011-08-20 | 2011-08-20 | Apparatus and Method for Protecting In-Ground Wood |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US13/214,171 US20130042547A1 (en) | 2011-08-20 | 2011-08-20 | Apparatus and Method for Protecting In-Ground Wood |
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US20130042547A1 true US20130042547A1 (en) | 2013-02-21 |
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US13/214,171 Abandoned US20130042547A1 (en) | 2011-08-20 | 2011-08-20 | Apparatus and Method for Protecting In-Ground Wood |
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Cited By (6)
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---|---|---|---|---|
US8820007B2 (en) | 2011-09-12 | 2014-09-02 | N. Eric Knudsen | Device for forming post sleeves, and method of use |
US8887452B2 (en) * | 2012-06-18 | 2014-11-18 | Kenneth C. Carhart | Apparatus and method for protecting in-ground wood |
US20140373461A1 (en) * | 2013-06-25 | 2014-12-25 | VMR Product Group | Post installation systems |
US9085915B1 (en) | 2014-03-06 | 2015-07-21 | Troy Emmett | Wooden support post protection system |
US20160237632A1 (en) * | 2015-02-18 | 2016-08-18 | Can-Traffic Services Ltd. | Films and methods for protecting roadside poles |
US20230349192A1 (en) * | 2022-04-29 | 2023-11-02 | Simpson Strong-Tie Company Inc. | Wrap Around Plates |
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US8820007B2 (en) | 2011-09-12 | 2014-09-02 | N. Eric Knudsen | Device for forming post sleeves, and method of use |
US9212463B2 (en) | 2011-09-12 | 2015-12-15 | N. Eric Knudsen | Device for forming post sleeves and related methods |
US9546496B2 (en) | 2011-09-12 | 2017-01-17 | N. Eric Knudsen | Device for forming post sleeves and related methods |
US10132099B2 (en) | 2011-09-12 | 2018-11-20 | N. Eric Knudsen | Device for forming post sleeves and related methods |
US20190119941A1 (en) * | 2011-09-12 | 2019-04-25 | N. Eric Knudsen | Device for forming post sleeves and related methods |
US10655355B2 (en) * | 2011-09-12 | 2020-05-19 | N. Eric Knudsen | Device for forming post sleeves and related methods |
US8887452B2 (en) * | 2012-06-18 | 2014-11-18 | Kenneth C. Carhart | Apparatus and method for protecting in-ground wood |
US20140373461A1 (en) * | 2013-06-25 | 2014-12-25 | VMR Product Group | Post installation systems |
US9085915B1 (en) | 2014-03-06 | 2015-07-21 | Troy Emmett | Wooden support post protection system |
US20160237632A1 (en) * | 2015-02-18 | 2016-08-18 | Can-Traffic Services Ltd. | Films and methods for protecting roadside poles |
US20230349192A1 (en) * | 2022-04-29 | 2023-11-02 | Simpson Strong-Tie Company Inc. | Wrap Around Plates |
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