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2. Fatigue (material) - Wikipedia

   en.wikipedia.org/wiki/Fatigue_(material)

   Fatigue (material) Fracture surface of an aluminium crank arm from a bicycle. The dark area (due to oil, dirt and fretting) is a slow growth fatigue crack and may contain striations. The bright area is caused by sudden fracture. Mechanical failure modes. Buckling.

3. A-frame building - Wikipedia

   en.wikipedia.org/wiki/A-frame_building

   A-frame buildings are an ancient form in Europe (e.g. cruck frame construction or grubenhaus ), China, and the South Pacific islands. Sometimes called a roof hut, these were simple structures used for utilitarian purposes until the 1950s. [ 2] In 1934, R. M. Schindler built the first modern A-frame house, for owner Gisela Bennati, in Lake ...

4. Gantry (transport) - Wikipedia

   en.wikipedia.org/wiki/Gantry_(transport)

   Gantry (transport) A gantry (also known as a sign holder, road sign holder, sign structure or road sign structure) is a traffic sign assembly in which signs are mounted or railway signals are supported on an overhead support. They also often contain the apparatus for traffic monitoring systems and cameras, or open road tolling systems.

5. A-frame - Wikipedia

   en.wikipedia.org/wiki/A-frame

   A-frame. An A-frame is a basic structure designed to bear a load in a lightweight economical manner. The simplest form of an A-frame is two similarly sized beams, arranged in an angle of 45 degrees or less, attached at the top, like an uppercase letter 'A'. These materials are often wooden or steel beams attached at the top by rope, welding ...

6. Steel building - Wikipedia

   en.wikipedia.org/wiki/Steel_building

   Steel building. A steel building is a metal structure fabricated with steel for the internal support and for exterior cladding, as opposed to steel framed buildings which generally use other materials for floors, walls, and external envelope. Steel buildings are used for a variety of purposes including storage, work spaces and living accommodation.

7. Steel frame - Wikipedia

   en.wikipedia.org/wiki/Steel_frame

   Steel frame. Rectangular steel frame, or "perimeter frame" of the Willis building (at right) contrasted against the diagrid frame at 30 St Mary Axe (at center), in London. Steel frame is a building technique with a " skeleton frame" of vertical steel columns and horizontal I-beams, constructed in a rectangular grid to support the floors, roof ...