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Steel casing pipe is used in different types of horizontal underground boring, where the pipe is jacked into an augered hole in segments and then connected together by welding or by threaded and coupled ends, or other proprietary pipe connectors such as interference-fit interlocking push-on joints.
A concrete spacer with a plastic clip in use Concrete spacers in a precast element Diaphragm wall block on rebar for a Diaphragm wall. A rebar spacer is a short, rod-like device used to secure reinforcing steel bars, or rebar, within cast assemblies for reinforced concrete structures. The rebar spacers are fixed before the concrete is poured ...
In general, a spacer is a solid material used to separate two parts in an assembly. Spacers can vary in size from microns to centimeters. They can be made of metal, plastic, glass, and other materials. Shapes include flat sheet, cylindrical and spherical. Two sizes of metal standoffs and one plastic standoff.
Interlocking is an arrangement of signal apparatus that prevents conflicting movements through an arrangement of tracks such as junctions or crossings. On the London Underground signals and points are operated and controlled by an array of electrical, pneumatic and mechanical components. [ 1 ]
A screw is then inserted through an opposing slot and tightened to create a pull effect. This type of join is a very common joint in factory-made furniture. Mitre joint: Similar to a butt joint, but both pieces have been beveled (usually at a 45-degree angle). Box joint: A corner joint with interlocking square fingers.
Interlocking (US) The interlocking tower and tracks in Des Plaines, Illinois Any location that includes a switch or crossing of two tracks, derived from the early practice of installation of a system of mechanical equipment called an interlocking plant to prevent collisions. See also signal box. Interlocking is also the term for the actual ...
IEC 61854 Overhead lines – Requirements and tests for spacers; IEC 61855 Household electrical hair care appliances – Methods of measuring the performance; IEC 61857 Electrical insulation systems; IEC 61858 Electrical insulation systems – Thermal evaluation of modifications to an established electrical insulation system (EIS)
Spacers which define conducting features need to be cut to avoid forming loops. In the alternative spacer-is-dielectric (SID) approach, the spacers define dielectric spaces between conducting features, and so no longer need cuts. The mandrel definition becomes more strategic in the layout, and there is no longer a preference for 1D line-like ...