Cease logs are lengthy rectangular boards or beams which might be positioned on high of each other after which dropped into pre-made slots inside a weir, gate or channel. It’s a hydraulic engineering management factor and is utilized in a floodgate to manage and alter the extent of water or the speed of stream in a canal, river, or reservoir. They could be manufactured from varied supplies together with metal and composites.
They’re fairly often used to briefly cease or block the stream of water by a canal or spillway to permit routine upkeep. Typically they might be used for longer intervals, as an illustration, when an space of land reminiscent of a subject is flooded and cease logs are being utilized in smaller gates to manage the depth of water within the subject. They are often left in and adjusted throughout the time that the sector is flooded.
By including or eradicating particular person stoplogs, the operator of a gated construction has the flexibility to manage the water stage in a given channel. Gates could comprise a couple of log and may make use of a number of logs. The logs are lowered horizontally into an area between two grooved piers. A lot bigger gate buildings make use of a number of bays during which cease logs will be positioned to manage the stream charge of the water by the construction.
Because of the cease logs or boards being subjected to excessive charges of water stream, they may ultimately present indicators of damage and can start to leak. As particular person ones age they’re changed with new ones.
Smaller stoplogs which might be designed to be used by a single enskilt avlopp are typically referred to as hand stops. They’re used to manage water stream in such locations reminiscent of ditches and rice fields.
They supply a cheap means for isolation duties and weir purposes the place a single piece cease gate would show too heavy to carry, or the place a number of door sections are required.
Cease logs could also be comprised of quite a lot of supplies. Chrome steel cease logs with a sealing mechanism of EPDM (Ethylene Propylene Di Methyl) are appropriate to be used in most water together with sewage and effluent remedy crops.
The final commonplace measurement vary is something from 1000mm sq. as much as 2000mm sq., nonetheless bigger or smaller sizes can be found, and assemblies are usually constructed to the purchasers necessities.
A typical log will probably be manufactured utilizing a composite sandwich development comprising of a light-weight inflexible mobile core, with a totally welded metal field part between two different skins of inflexible compressed composite plastic, which is asbestos free, inflexible, non poisonous and extremely violet stabilised.