| Stop logs are long rectangular boards or beams that | | | | high rates of water flow, they will eventually show |
| are placed on top of one another and then dropped | | | | signs of wear and will begin to leak. As individual ones |
| into pre-made slots inside a weir, gate or channel. It is | | | | age they are replaced with new ones. |
| a hydraulic engineering control element and is used in | | | | Smaller stoplogs that are designed for use by a single |
| a floodgate to control and adjust the level of water | | | | individual are sometimes called hand stops. They are |
| or the rate of flow in a canal, river, or reservoir. | | | | used to control water flow in such places such as |
| They may be manufactured from various materials | | | | ditches and rice fields. |
| including steel and composites. | | | | They provide an economical means for isolation |
| They are very often used to temporarily stop or | | | | duties and weir applications where a single piece stop |
| block the flow of water through a canal or spillway | | | | gate would prove too heavy to lift, or where multiple |
| to allow routine maintenance. Sometimes they may | | | | door sections are required. |
| be used for longer periods, for instance, when an | | | | Stop logs may be made from a variety of materials. |
| area of land such as a field is flooded and stop logs | | | | Stainless steel stop logs with a sealing mechanism of |
| are being used in smaller gates to control the depth | | | | EPDM (Ethylene Propylene Di Methyl) are suitable for |
| of water in the field. They can be left in and | | | | use in most water including sewage and effluent |
| adjusted during the time that the field is flooded. | | | | treatment plants. |
| By adding or removing individual stoplogs, the | | | | The general standard size range is anything from |
| operator of a gated structure has the ability to | | | | 1000mm square up to 2000mm square, however |
| control the water level in a given channel. Gates may | | | | larger or smaller sizes are available, and assemblies |
| contain more than one log and can make use of one | | | | are generally built to the customers requirements. |
| or more logs. The logs are lowered horizontally into a | | | | A typical log will be manufactured using a composite |
| space between two grooved piers. Much larger gate | | | | sandwich construction comprising of a lightweight rigid |
| structures make use of multiple bays in which stop | | | | cellular core, with a fully welded steel box section |
| logs can be placed to control the flow rate of the | | | | between two other skins of rigid compressed |
| water through the structure. | | | | composite plastic, which is asbestos free, rigid, non |
| Due to the stop logs or boards being subjected to | | | | toxic and ultra violet stabilised. |