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A silt fence, sometimes (misleadingly) called a "filter fence," [1] is a temporary sediment control device used on construction sites to protect water quality in nearby streams, rivers, lakes and seas from sediment (loose soil) in stormwater runoff. Silt fences are widely used on construction sites in North America and elsewhere, due to their ...
The first step in installing a picket fence is to insert the posts into the ground. Traditionally this is done by digging deep holes (usually 36 inches (91 cm) x 12 inches (30 cm)) either manually or with a power auger. The posts are then placed upright into the ground and concrete is poured to cement them into place.
Nofence is a Norwegian company that makes GPS collars for farm animals (cattle, sheep, and goats) that discourage them from crossing virtual fences. [ 1][ 2] Oscar Hovde Berntsen has been working on the idea of virtual fencing, as an alternative to fixed electric fencing, since the 1990s. [ 3] Nofence was incorporated in 2011. [ 3]
Corrugated galvanised iron. Typical corrugated galvanised iron appearance, with visible large flake type patterns. The galvanised sheet is viewed from below and is supported by a piece of angle iron (painted white). Corrugated galvanised iron (CGI) or steel, colloquially corrugated iron (near universal), wriggly tin (taken from UK military ...
RAF aircrew with one of their Bristol Beaufighters on a PSP airstrip at Biferno, Italy, August 1944. Marston Mat, more properly called pierced (or perforated) steel planking (PSP), is standardized, perforated steel matting material developed by the United States at the Waterways Experiment Station shortly before World War II, primarily for the rapid construction of temporary runways and ...
The minimum width of the blade, which must be at the button, is 4 mm (0.16 in); its thickness, also immediately below the button, must be at least 1.2 mm (0.047 in)." [ 3 ] : m.23.1 The cross-sectional profile of the sabre blade is commonly a V-shaped base which transitions to a flat rectangular shaped end with most blade variants, but this is ...
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