Hi, planning a partial garage conversion and looking for some advice. Garage is single-skin brick, 6.2m x 5m with a fink truss roof and concrete slab floor. The pitch of the roof is quite steep so there's a lot of unused space, particularly in the middle. I gather that because the chords are only rated to support the roof + snow load, if I wanted to use the upper part for storage (nothing mad, boxes, some tools etc) I'd need to add in separate joists to support the floor.
I've looked into 2 options:
1. Joists running parallel to the existing chords sitting on the wall plates on either side (6.2m span)
2. Joists running perpendicular to the existing chords and higher up attached to ledger boards resin anchored to the wall with hangers (span 5m).
I've since realised that i don't think i could realistically even get the joists up there running them perpendicular due to limited space and because the span is quite a bit, wondering about the feasibility of reducing it. Was thinking of putting a stud wall in (so spans would be 2.2m and 4m) running perpendicular to the existing chords and then sitting the joists on this with the other ends on the wall plates and then bolting the joists together. Appreciate this would make the stud wall load bearing but not sure if this would need additional footings or would the slab be enough? Looking at span tables, I'm thinking C24 47x195 at 600 centres for the joists. Please tell me if this is a silly idea as have been doing a bit of research but not sure what the best way to go about this would be. Thanks
I've looked into 2 options:
1. Joists running parallel to the existing chords sitting on the wall plates on either side (6.2m span)
2. Joists running perpendicular to the existing chords and higher up attached to ledger boards resin anchored to the wall with hangers (span 5m).
I've since realised that i don't think i could realistically even get the joists up there running them perpendicular due to limited space and because the span is quite a bit, wondering about the feasibility of reducing it. Was thinking of putting a stud wall in (so spans would be 2.2m and 4m) running perpendicular to the existing chords and then sitting the joists on this with the other ends on the wall plates and then bolting the joists together. Appreciate this would make the stud wall load bearing but not sure if this would need additional footings or would the slab be enough? Looking at span tables, I'm thinking C24 47x195 at 600 centres for the joists. Please tell me if this is a silly idea as have been doing a bit of research but not sure what the best way to go about this would be. Thanks
