Barn renovation: cutting through joist
Barn renovation: cutting through joist
(OP)
Hello all,
I have a dilemma in a barn renovation. I need to build a staircase with full (human) height access to the 2nd floor. Ideal would be to cut through the lower joist. I realise this is structurally challenging, but I am wondering if there is any kind of precedent for this kind of intervention?
I am thinking of bracing both sides of the remaining rafter to the wall below, as this has significant mass (about 70 cm thick).
Any advice, pictures, examples very much appreciated!
I have a dilemma in a barn renovation. I need to build a staircase with full (human) height access to the 2nd floor. Ideal would be to cut through the lower joist. I realise this is structurally challenging, but I am wondering if there is any kind of precedent for this kind of intervention?
I am thinking of bracing both sides of the remaining rafter to the wall below, as this has significant mass (about 70 cm thick).
Any advice, pictures, examples very much appreciated!

RE: Barn renovation: cutting through joist
What other loads are on the red section that we are not seeing?
RE: Barn renovation: cutting through joist
Approximate staircase position and landing shown in new image.
The reason to cut through the lower joist, is that distance between bottom and top joists is about 160cm, - terrible for bumping heads.
The loads on the bottom joist: i assume it is well connected to exterior mortar/walls to avoid bowing of walls. You can also see central poles resting in centre of lower joist, stress which is distributed downwards through smaller vertical poles and a wall on the far side.
Image from inside perspective looking up (lots of misc. wooden structures to be removed)
RE: Barn renovation: cutting through joist
RE: Barn renovation: cutting through joist