Balanced Door
     
     
    Features
     
    • Balanced doors are designed to overcome the effects of external wind and internal stack pressures.
    • The location of the pivot points distributes door weight more evenly, placing less stress on frame and hardware. (increasing longevity of the door system)
    • Only two-thirds of a balanced door protrudes onto exterior sidewalk space.
    • Large or heavy doors design is allowed .
    • Floor cutouts are not necessary for closer/checking mechanism.
    • Metal, wood door or glass door with stainless steel or aluminum frames/stiles/rails.
    • Complaint to ADA requirements.
 
What is a Balanced Door?
 
A balanced door is a kind of swing door mostly used as an exterior entrance door in a public or commercial building. It is different from all kinds of hinge doors as its unique hardware and mechanical design allow itself to bear and efficiently operate a tall and heavy door leaf. The pedestrians can open it easily without much pulling or pushing force, and the door leaf can make a full close by itself.

The reason making it a “balanced” door is that the exterior wind pressure is distributed by its unique swing path, the location of the door swing fulcrum point makes the door open with ease by leverage and the pivot spring force overcomes the interior stack pressure to fully close the door.

 
Where to use a balanced door?
 

*High Traffic Entrance
*High-rise buildings affected by wind tunnel effect
*Where the entrance door needs to be heavy and tall
*Where the door needs to resist the frequent gale

 
Comparing to a Traditional Swing Door
 
 
 
  
 
 
 
Balanced door
 
1. When opening the door, the wind pressure is distributed to inside through the gap on the hinge side and on the edge side the stack pressure push back to accelerate the door open. 
2. The required door opening force is only half to two third of regular force.
3. The torsion bar provides closing force against the stack pressure and fully closes the door.
4. The door retracts while opening and saves one third of door width taking exterior public space when fully opened.
5. Reduced waving radius to fasten opening/closing speed.
6. No entrance traffic jam with larger door size.
 
Conventional Door
 
1. Door opening force against the entire door weight and wind.
2. The internal stack pressure makes it hard to keep the door fully closed.
3. The full waving radius takes much time to a full opening and takes much exterior public space to cause entrance traffic jam.
 
 
Effects of Wind
 
Watch the animation : https://youtu.be/y-YPyzFXvzI
 
Balanced door on the right side distributes wind force efficiently.
 
 
Balanced door demo
 
 
 
Balanced Door v.s. Hinge Door operation on site