A counterweighted double hung window would allow either window to stay in any position.
Window counterweight door.
Sash chain or cord.
The diameter of the sash pulleys to be specified must be sufficient to suspend the counterweight free of contact with the window jamb.
The sash pulley specified should be designed to carry one half the weight of the glazed sash smoothly and dependably throughout the life of the window.
The sc1500 fully recessed counterweight balanced door is custom made and designed for all applications where security and superior appearance is required and openings designed to span as little as 1m to as much as 25m in width with no external projection and where the door is to provide full opening height.
Overhead door rolling counter doors provide a multitude of attractive solutions for smaller openings to 20 wide and 9 high.
Ideal for a host of applications in commercial retail corporate and professional environments our comprehensive system of counter doors encompasses three basic types metal curtain wood curtain and integral frame and sill.
At the top of the window track there would be a pulley.
A cord called a sash cord would run from the window over the pulley to a window counterweight.
Renlita custom opening solutions is a manufacturer of custom crafted and installed vertical openings.