This site intends to present technical proposals on hydraulic steel structures such as hydraulic gates,
　intake and discharge equipments, silt/sand dischargers etc. which are provided harbour entrances, docks
　and locks along waterways, or dams, weirs, floodgates and power stations on rivers, or irrigation systems.

PROPOSAL３　【STORM GATE・・OTHERS】

　A technical proposal on super large storm gates other than the torsion type and membrane structure is under consideration. More time is necessary for reliability improvement and prototype verification of the gate. Details are as follows.

１．Estimation of Proposed Technology

　The result of estimation on the top page is as follows.
（１）This technology is deemed not to be satisfactory for a technical proposal. Its reason is,
　1) The initial cost is equal to or less than 1/3〜1/2 of the ordinary technology
　2) But, the reliability of this technology is much less than ordinary technologies.
（２）Still there are risks which prevent the proposal from being realized. Details are as below.
　1) Necessary prototype verification has not been completed. (Pro. Ver.)
　2) The patentee's agreement has not been obtained. (Patentee)
　3) An agreement of the beneficiaries has not been obtained. (Bus. His.)
（３）The engineering level is �U (Preliminary design).