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Extra-Hot 6' x 6' Utility Pole / Key Hole Ground Thawing Electric Construction Blanket with 18" Dia. Cutout. Key Hole / Utility Pole Heated Ground Thaw Blankets offer a low-weight, highly efficient heating source for utility companies and construction workers that need to thaw frozen ground in and around poles, posts and holes. Powerblanket EH0606-PH18 can be placed directly around a column or pole to provide heat where needed. Thaw up to 8 feet deep in record time. Every blanket is water resistant and constructed of rugged, D-15 vinyl. These construction grade blankets provide the most continuous and even heating source available, providing the perfect amount of heat to ensure complete thawing of the entire area.
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In the diagram below you can see what will happen through a series of freeze and thaw cycles (courtesey of Garteway Farms).
Frost heave shown due to improper use of concrete in and around post!
Not only is lateral pressure applied to the post and its concrete base, but the vertical ground expansion under the lid of concrete amplifies the upward motion of the post. As the concrete moves upwards, its rough edges dislodge surrounding dirt, which falls to the bottom of the hole.
Over time, the fence post is literally lifted right out of the ground! Decks and porches will be ruined, bridges and roads crack and deteriorate... and home repairs skyrocket. Cold and freezing weather reeks havoc on post, pillars, sonotubes, decks, bridges and other structures with support columns. When repair work is needed, Powerblanket Keyhole Thawing Blankets will get the job done quickly. Thaw froen ground in and around post and pillars quickly with these outdoor heated constructions blankets designed specifically for post whole repair.
If opportunity allows, a better technique for initial groundwork preparation is to dig a bell shaped hole - larger at the bottom than the top. Also, the concrete should not extend above ground level. Doing this insures that lateral expansion tends to force the post downwards, and also insures that there is no lip for the expanding ground to get a hold of to lift the post upwards.
|Country of Manufacture||United States|
|Dimensions||6' x 6' (feet)|
|Heat Range||High (150°F)|
|Certifications||UL/CSA/ETL Safety Certified|
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