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2. Span (engineering) - Wikipedia

   en.wikipedia.org/wiki/Span_(engineering)

   In engineering, span is the distance between two adjacent structural supports (e.g., two piers) of a structural member (e.g., a beam). Span is measured in the horizontal direction either between the faces of the supports (clear span) or between the centers of the bearing surfaces (effective span): [1] A span can be closed by a solid beam or by ...

3. Pipe support - Wikipedia

   en.wikipedia.org/wiki/Pipe_support

   A pipe support or pipe hanger is a designed element that transfer the load from a pipe to the supporting structures. The load includes the weight of the pipe proper, the content that the pipe carries, all the pipe fittings attached to pipe, and the pipe covering such as insulation. The four main functions of a pipe support are to anchor, guide ...

4. Electrical conduit - Wikipedia

   en.wikipedia.org/wiki/Electrical_conduit

   Fiberglass conduit is available in multiple wall thicknesses to suit various applications and has a support distance very similar to steel. High temperature, low smoke, no flame, classified area (Class I Division 2), and zero halogen versions are also manufactured for specialty applications such as subway tunnels and stations and in the US can ...

5. Four-point flexural test - Wikipedia

   en.wikipedia.org/wiki/Four-point_flexural_test

   l A: Span length (distance between support point and the nearest loading point of the test punch) in mm; l B: Length of the reference beam (between the loading points, symmetrically placed relative to the loading points) in mm; D L: Distance between the reference beam and the main beam (centered between the loading points) in mm

6. Sleeve (construction) - Wikipedia

   en.wikipedia.org/wiki/Sleeve_(construction)

   A general practice is to size the sleeve two NPS (pipe sizes) up from the diameter of the penetrant. For example, a 4" pipe, with 1" of thermal insulation makes a 6" penetrant (1" pipe covering on each side of the pipe), plus two pipe sizes = an 8" sleeve, creating a 1" annulus .

7. Overhead line - Wikipedia

   en.wikipedia.org/wiki/Overhead_line

   This movement is proportional to the distance between anchors. Tension length has a maximum. For most 25 kV OHL equipment in the UK, the maximum tension length is 1,970 m (6,460 ft). [6] An additional issue with AT equipment is that, if balance weights are attached to both ends, the whole tension length is free to move along the track.