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2. Screw piles - Wikipedia

   en.wikipedia.org/wiki/Screw_piles

   Screw pile designers typically use their own design software which has been developed through field testing of differing compression pile and tension anchor configurations in various soil profiles. Corrosion is addressed based on extended field trials, combined with worldwide databases on steel in ground corrosion.

3. Earth anchor - Wikipedia

   en.wikipedia.org/wiki/Earth_anchor

   An earth anchor is a device designed to support structures, most commonly used in geotechnical and construction applications. Also known as a ground anchor , percussion driven earth anchor or mechanical anchor , it may be impact driven into the ground or run in spirally, depending on its design and intended force-resistance characteristics.

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5. Anchor bolt - Wikipedia

   en.wikipedia.org/wiki/Anchor_bolt

   Tapcon screws are a popular anchor that stands for self tapping (self threading) concrete screw. Larger diameter screws are referred to as LDT's. This type of fastener requires a pre-drilled hole—using a Tapcon drillbit—and are then screwed into the hole using a standard hex or phillips bit. These screws are often blue, white, or stainless ...

6. Molly (fastener) - Wikipedia

   en.wikipedia.org/wiki/Molly_(fastener)

   Figure 1 of the original patent for the molly bolt, U.S. Patent No. 2,018,251. The molly bolt was patented in 1934 by George Frederick Croessant. [3] Although his patent acknowledges that expandable fasteners of this general kind were already known, Croessant's patent is intended to provide "an improved and adequate anchoring grip that may be retightened if necessary and that will permit ...

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