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2. Rack railway - Wikipedia

   en.wikipedia.org/wiki/Rack_railway

   The Riggenbach system suffers from the problem that its fixed ladder rack is more complex and expensive to build than the other systems. Following the success of the Vitznau–Rigi railway, Riggenbach established the Maschinenfabrik der Internationalen Gesellschaft für Bergbahnen (IGB) – a company that produced rack locomotives to his design.

3. Wrought iron - Wikipedia

   en.wikipedia.org/wiki/Wrought_iron

   Wrought iron is a form of commercial iron containing less than 0.10% of carbon, less than 0.25% of impurities total of sulfur, phosphorus, silicon and manganese, and less than 2% slag by weight. [18] [19] Wrought iron is redshort or hot short if it contains sulfur in excess quantity. It has sufficient tenacity when cold, but cracks when bent or ...

4. Fixed ladder - Wikipedia

   en.wikipedia.org/wiki/Fixed_ladder

   Fall protection system: Fixed ladders above 24' must have a fall protection system in accordance with OSHA Standard 1910.28(b)(9)(i)(C). Cages are not anymore considered as fall protection, and ladders that are newly installed or replaced after November 19, 2018, must have a fall protection system based on OSHA's new fixed ladder requirements.

5. Anchor plate - Wikipedia

   en.wikipedia.org/wiki/Anchor_plate

   One popular style is the star anchor, an anchor plate cast or wrought in the shape of a five-pointed star. Other names and styles of anchor plate include earthquake washer, triangular washer, S-iron, and T-head. [2] In the United Kingdom, pattress plate is the term for circular restraints, [3] tie bar being an alternative term for rectangular ...

6. Utility pole - Wikipedia

   en.wikipedia.org/wiki/Utility_pole

   FRC poles are hollow and similar to the tubular steel poles, with a typical wall thickness of 1 ⁄ 4 to 1 ⁄ 2 in (6 to 13 mm) with an outer polyurethane coating that is ~0.002 in (0.05 mm) thin. As with all the other non-wood poles, FRC poles cannot be mounted with the traditional climbing hardware of hooks and gaffs.

7. Ladder - Wikipedia

   en.wikipedia.org/wiki/Ladder

   An extension ladder. A ladder is a vertical or inclined set of rungs or steps commonly used for climbing or descending. There are two types: rigid ladders that are self-supporting or that may be leaned against a vertical surface such as a wall, and rollable ladders, such as those made of rope or aluminium, that may be hung from the top.