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A gate may make use of one or more logs. Each log is lowered horizontally into a space or bay between two grooved piers referred to as a stoplog check. [3] In larger gate structures, there will be multiple bays in which stoplogs can be placed to better control the discharge through the structure.
A notch weir is any weir where the physical barrier is significantly higher than the water level except for a specific notch (often V-shaped) cut into the panel. At times of normal flow all the water must pass through the notch, simplifying flow volume calculations, and at times of flood the water level can rise and submerge the weir without ...
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Charpy test sample with a notch. In mechanical engineering and materials science, a notch refers to a V-shaped, U-shaped, or semi-circular defect deliberately introduced into a planar material. In structural components, a notch causes a stress concentration which can result in the initiation and growth of fatigue cracks.
Often this type of gate is called a portagee fence or a portagee gate in various ranching communities of coastal Central California. Most gates can be opened by push post. The chain is then wrapped around the tractor post and pulled onto the nail, stronger people can pull the gate tighter but anyone can jar off the chain to open the gate.
The moving part or parts of a gateway may be considered "doors", as they are fixed at one side whilst opening and closing like one. [2] A gate may have a latch that can be raised and lowered to both open a gate or prevent it from swinging. [3] Gate operation can be either automated or manual. Locks are also used on gates to increase security.
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