Well done this reminds me on a system i had done to open louvers on top of the front door using a multi pulley system i did not use any counterweight though but what was cool about it was that i managed to make a system that opened and closed the two louvers simultaneously with the rope hanging only from one side.
Counter weight door system.
It was quite practical.
Architectural counter weight doors include.
The hermco counterweight system utilizes a set of patented winding drums with counterweights on each side of the door providing the best lifting and closing system on the market today.
After you compare we know you will agree.
Counterweight doors work exactly how they sounds there are counterweights on the end of a cable that counter the weight of the door making it virtually weight less so you can open it close it with ease.
Counterweight doors are the perfect application when the headroom above the door opening is too low to install a roll up door.
Series 1500 single leaf fully recessed.
Series 3000 bi fold two leaf.
Series 5000 vertical lift.
They are ideal when security is essential where noise or temperature control might be an issue where you need a minimal internal or external projection and have little available headroom with a very high opening.
Hermco counterweight systems are designed to install on new or existing garage doors.
Series 2000 hingeaway two leaf.
Series 1000 single leaf partly recessed.
A counter weight door can also have a pilot door or pass door installed on the door so you can enter the building without opening the counterweight door.