enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Screw piles - Wikipedia

   en.wikipedia.org/wiki/Screw_piles

   Screw piles were first described by the Irish civil engineer Alexander Mitchell in a paper in Civil Engineer and Architect's Journal in 1848; however, helical piles had been used for almost a decade by this point. [2] Screw foundations first appeared in the 1800s as pile foundations for lighthouses, [3] and were extensively used for piers in ...

3. Harrisburg, North Carolina - Wikipedia

   en.wikipedia.org/wiki/Harrisburg,_North_Carolina

   Harrisburg is located in southwestern Cabarrus County. It is bordered to the north by Concord and to the west by Charlotte in Mecklenburg County.. North Carolina Highway 49 passes through the center of Harrisburg, leading northeast 57 miles (92 km) to Asheboro and southwest 13 miles (21 km) to the center of Charlotte.

4. Earth anchor - Wikipedia

   en.wikipedia.org/wiki/Earth_anchor

   Single helix earth anchors Guyed mast 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.

5. Screw picket - Wikipedia

   en.wikipedia.org/wiki/Screw_picket

   A screw picket is a metal device which is used to secure objects to the ground. Today, screw pickets are used widely to temporarily "picket" dogs. They are also used to graze animals such as sheep, goats, and horses. Screw pickets are also used to stabilize small trees, tent poles, and other objects that are intended to remain upright.

6. Screw-pile lighthouse - Wikipedia

   en.wikipedia.org/wiki/Screw-pile_lighthouse

   Fowey Rocks Light, near Key Biscayne, Florida Spit Bank Lighthouse , in Cork Harbour , Ireland was built by Alexander Mitchell between 1851 and 1853 and is still in use. Carysfort Reef Light , four miles east of Key Largo , Florida , was built in 1852 and was the oldest screw-pile (with disk) lighthouse still in service in the United States ...

7. List of screw and bolt types - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_and_bolt_types

   The term fine adjustment screw typically refers to screws with threads from 40–100 TPI (Threads Per Inch) (0.5 mm to 0.2 mm pitch) and ultra fine adjustment screw has been used to refer to 100–254 TPI (0.2 mm to 0.1 mm pitch). These screws are most frequently used in applications where the screw is used to control fine motion of an object.