Renovation of roof slope and relocation of knee wall

Hello, I want to enlarge the floor area in the children's room and behind the "Drempel" there are metal straps that are attached to the beam on the wall and connected to the ceiling beams. Would it be unproblematic to shorten the straps to change the angle or can someone suggest an alternative that would allow moving the Drempel by about 50 cm? Thanks in advance!

I strongly advise against this. The steel straps are presumably back anchors for the foot purlin, which prevent the thrust from the roof from pushing the foot purlin and possibly the wall outward. The KS wall lacks the cast-in-place ring beam, which normally takes over this function and allows bolting the foot purlin to the ring beam.

This is the explanation for this construction that seems plausible to me. It is not the norm, but presumably a "homemade" solution that will also not appear in the structural analysis of the building—if such an analysis even exists. In principle, such components of the roof structure must not be removed or altered so as not to jeopardize the overall statics of the roof structure. Changes are only permitted with the involvement of a structural engineer and may also require a building permit.

However, you could clad the beams and the metal and use the spaces in between as niches for shelves or built-in cabinets. Maybe that is a compromise to still gain a little more space without changing the structure in the statics?

Hello everyone, first of all thank you for the contributions! I now had a structural engineer on site, the following result: leave a support beam and a steel band in the middle and cover them. Compensate the rest of the bands by tightly tensioning and screwing steeper bands on every ceiling beam. I can work with that! Thanks again!