VERTICAL LIFT GATES

• This is the gate that is in most common use in all the irrigation structures.
• It consists of a Rectangular skin plate of mild steel.
• This plate remains supported on a framework of I-girders or channel sections.
• Grooves are constructed on the crest as well as along the inside of piers.
• The gates slide or move, vertically up end down in these grooves.
• Water pressure acting on the gate is transferred to the crest and piers.
• In order to facilitate lifting and lowering of the gates, rollers are fitted in the grooves.
• The gates are lifted with the help of winches.
• Counterweights are also used to ease the lifting of the gates.
• Counterweights remain suspended with one end of the ropes.
• The other end of the ropes being connected to the gates.
• If gates are very big in size, they may be constructed in more than one part and each part moves separately.
• These gates may be constructed in sizes varying from 6 m to 15 m in height and 15 m in width.