All
Back in the early 1990's, on my way home from Brighton Tech I noticed a skip full of fire doors behind Boots and lugged one out (heavy) and onto the roof bars of my Astra estate.
This door had a rectangular wired glass 'window' next to the flat plate that you push on to open.
It is now part of the L-shaped computer desk in my little bedroom and fits under the window from wall to wall, supported on 2x1 battens at each end. Been in-situ for 30+ years. I had to cut it down to reduce its width to 27" and used the offcut to infill the rectangular hole (now halve its width). It was made of 34mm thick ?chipboard with plywood outer sheathing with a Sapele? wood finish and with finished edges.
I also cut down another sapele door to a width of 30" and this is along the longer wall and it hangs under the Boots fire door at one end nearest the window.
I notice that both doors are about 43mm thick which is odd. The sapele door was a lot lighter (but not as light as a normal interior egg-box door). I always thought that modern internal doors were 35mm thick, is this always the case ?.
I am contemplating removing the old Boots fire door because I am finding it tricky to clean the window etc, so I need something a lot narrower and possibly hinging up/down for access. The problem is the Sapele door is about 28cm short of the outer wall where the window is, so a support is needed (currently provided by the heavy Boots fire door and I don't know what is inside this Sapele door. It seems quite resilient but I am reluctant to stand on it (unlike the Boots fire door which takes my weight easily).
A trestle would do the trick -
I don't really want a leg (or more), I prefer open space under the desk. Maybe a diagonal bracing across the corner where the door is 28cm short of the out wall ?. The problem is I will have to put the radiator back (eventually !) so there is a space issue where the front wall support for this diagonal support ends, and how do you attach the cut end of a piece of X*Y timber that is cut to an angle so that it is flush with the wall and doesn't look naff ?.