Dam top gantry crane is employed to lift floodgate, Hydro-generating unit and trash rack on dams. The working area is a line or belt area along its running rails. The structure is plate girder or box girder. The lifting mechanism, gear box which hoist and crane traveling mechanism are driven by motors. There is a closed operation room on main beams. The slings is a hoisting beam powered by flexible cable device. The foot is protected by Buffer device and Windproof rail clipping device.

There are two kinds of dam top gantry crane: 1. Single direction: The lifting mechanism (slings/hook) is fixed on trolley and only travel along the rails direction on main beams, thus it can only lift one side floodgate/trash rack. 2. Double directions: The lifting mechanism on trolley can move vertically against the main beam rails direction, thus it can be used to lift 2 sides’ floodgates/trash racks of upstream and downstream.

Henan Mine Crane could arrange engineer to do supervision of installation, make the load test, do commissioning, training of the buyer's workers, the buyer should be responsible for each of our technician’s accommodation, meals, round-trip tickets, travel expenses and self-security. The engineer’ salary is USD100.00 per day abroad.

1. Quality problems of products sold by our company will be solved as per the “three guarantees” system of our company by the “three guarantees” service team;

2. Related personnel will be sent to the site immediately after receiving quality complaints (by call, letter or oral notice) from clients;

3. Personnel involved in after-sales service shall be serious and considerate in handling the problem to make clients care-free;

4. In addition to solve quality problems, personnel involved in after-sales service shall train clients, answer their technical inquiries and related questions free of charge;

5. Related cost for products with quality problem will be shouldered by our company. Our company charges for quality problems caused by clients (or problems after the warranty term), but the charge will not be higher than the expense (or cost);