Internal "foldback" door using parliament hinges?

[rossyl]

Hi,

Hoping you can offer some ideas.

- A double door size gap
- A 2 stair drop on one side
- On the other side, one of the door cannot be left open as it blocks another door.

So I think both doors need to go fold back onto one side of the door. Like a bi-fold door.

My trouble is that both of these doors are fire doors and so will be heavy. They will also be part glazed, adding to the weight.

I am concerned that they will sag in the middle and be a nightmare to use.

The flooring that they will be over is engineered wood. If they constantly rub they will destroy the flooring. Also, I don't want a track in the floor for them.

So... any ideas!!

I am hoping so.

Thanks
R

 

[foxhole]

Either use a 6inch hinge on frame and 3inch hinge on door centre or piano hinges.

 

[rossyl]

Even with piano hinges, would it not just sag off the frame?

 

[foxhole]

No zero sag with piano hinges, they would have to break to allow movement.