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The ladder paradox (or barn-pole paradox) is a thought experiment in special relativity. It involves a ladder, parallel to the ground, travelling horizontally at relativistic speed (near the speed of light) and therefore undergoing a Lorentz length contraction .
Pole building design was pioneered in the 1930s in the United States originally using utility poles for horse barns and agricultural buildings. The depressed value of agricultural products in the 1920s, and 1930s and the emergence of large, corporate farming in the 1930s, created a demand for larger, cheaper agricultural buildings. [2]
Putlog holes or putlock holes [1] are small holes made in the walls of structures to receive the ends of poles (small round logs) or beams, called putlogs or putlocks, to support a scaffolding. [2] Putlog holes may extend through a wall to provide staging on both sides of the wall.
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Some hex signs incorporate star shapes, while others may take the form of a rosette or contain pictures of birds and other animals. [ 7 ] The term barnstar has been applied to star-shaped anchor plates that are used for structural reinforcement, particularly on masonry buildings from the 18th and 19th centuries.
Arizona: The Chuckbox. Tempe. The sign outside touts "over 278 sold," but The Chuckbox is likely to sell that many burgers in a day now. Watch as they grill your burger (and bun) over a mesquite ...
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