Vertical Lift Gates

Several types of vertical lift gates are used in a variety of hydraulic structures, including spillways, low-level inlets/outlets, powerhouses, and navigation locks. In recent years, there have been considerable problems with the performance of vertical lift gates. The majority of these problems have occurred as result of fatigue, causing fracture in main structural framing members of the gate. New criteria address methods to reduce fatigue and fracture through design and construction techniques. Research has proven that the serviceability of the gate can be improved by using proper material selection and fabrication techniques. These fabrication techniques include the use of proper joint detailing and welding procedures. Proper material selection and material compatibilities are essential parts of providing
a long service life of the structure. Contents (chapters): 1. Intro 2. Description & application; 3. Navigation lock lift gates; 4. Spillway crest gates (load, fatigue, fracture control, material selection, serviceability, weldments, etc); 5. Outlet gates; 6. Design analysis & detail requirements; 7. Operating equipment (hoists, dogging devices, lifting beams, etc); 8. Corrosion control (coating systems, cathodic protection, control contamination, etc); 9. Maintenance considerations