Counter Weight Issue

[abimaks]

hello eveybody....
I'm abhijeet from bangalore n i've jus joined CE ... m hoping i can add value to the work u guys are putting in while gettin some valuable inputs on the stuff i do as well.

as a person i believe in simple solutions n for now m looking at some kinda counter weight funda to allow a 40kg frame measuring 3' by 5' and fixed on one side with heavy duty industrial hinges ... the frame needs to b lifted to a 45degree angle ... from a normal position (horizontal)one ... coupla points to b noted 1. Its a delicate thing
2.it needs to open n close some 200 times in an hour.

Currently we use a 15 kg frame which one guy lifts n brings down .... we need a counter weight of some sort to assist him with the extra weight of the new frame.