Picture 3 also has a support center of picture that in all likelihood will need to be worked i.
Removing roof supports attic.
Adjust the bob until it is directly over the line and still.
Attic trusses have a rectangular shape inside each truss.
However if you want to better utilize the space in your loft you may consider changing roof trusses and going for stick framing or rafters instead.
That can complicate things.
If the roof slope is steeper than 9 inches in 12 inches of run it doesn t take much width to end up with a nice room 12 feet wide with an 8 foot ceiling.
In pictures 1 3 it looks like there has been an addition to the original structure.
Remember any alterations to a roof should be undertaken only with an engineer.
Roof trusses are a common means of support and load bearing.
Watch this video before.
Let s start with what i can see.
Dangle the bob over the line at one end of the attic with the string against the lower edge of the rafter until it stops moving.