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2. Flagpole - Wikipedia

   en.wikipedia.org/wiki/Flagpole

   Flagpoles are usually made of wood or metal. Flagpoles can be designed in one piece with a taper (typically a steel taper or a Greek entasis taper), [2] or be made from multiple pieces to make them able to expand.

3. List of flagpoles by height - Wikipedia

   en.wikipedia.org/wiki/List_of_flagpoles_by_height

   This list of flagpoles by height includes completed flagpoles which are either free–standing or supported, excluding the height of any pedestal (plinth), building, or other base platform which may elevate them.

4. Cable railing - Wikipedia

   en.wikipedia.org/wiki/Cable_railing

   Cable railing requires very rigid frames compared to many other types of railings due to the forces applied to the end posts by tensioning the cables. Cables must be tensioned to provide minimum cable deflection using 4-inch sphere, to satisfy building code requirements. [ 2 ]

5. North American railroad signals - Wikipedia

   en.wikipedia.org/wiki/North_American_railroad...

   Signal bridges and masts typically provide at least 20 feet (6.1 m) of clearance over the top of the rail. Bracket masts are arranged with multiple signals are mounted on the same masts governing two adjacent tracks. Bracket masts tend to be the tallest type of signal to allow the train crew to see the signal over a train on the intervening track.

6. Utility pole - Wikipedia

   en.wikipedia.org/wiki/Utility_pole

   Non-wood poles; There are three main non-wood pole materials and structures on which the attachment hardware may be mounted: concrete, steel, and fiber-reinforced composite (FRC). Each material has intrinsic characteristics that need to be considered during the design and manufacture of the attachment hardware. Concrete poles

7. Fishplate - Wikipedia

   en.wikipedia.org/wiki/Fishplate

   An improvement over fishplate rail connectors is directly bonding rails together using thermite or flash butt welding. In 1967, the Hither Green rail crash occurred on the Southern Region of British Railways when a rail fractured at its fishplate joint. The crash accelerated welded rail connections, with strict procedures on concrete and wooden ...