Abstract: Abstract:Taking the counter weight of the oneway gantry hoist QM2×800/250kN of a hydropower station as example, using the software Staad.pro, the reaction force of the structure support legs was analyzed, and a calculation method of the counter weight was given. The method was used as reference to determine the practical counter weight of the gantry hoist, and the problem of unbalance of counter weight was solved effectively.

Key words: Key words:gantry gate hoist, counter weight, rotating crane, Staad.pro software, structure analysis, reaction force of supporting leg