Picture 3 also has a support center of picture that in all likelihood will need to be worked i.
Removing roof supports attic.
Attic trusses have a rectangular shape inside each truss.
In pictures 1 3 it looks like there has been an addition to the original structure.
Adjust the bob until it is directly over the line and still.
Use a plumb bob on a string to find the point on the upper cords or rafters of your trusses directly above the line.
Look at this photo of the space created by attic trusses at my home.
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.
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.
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.
Remember any alterations to a roof should be undertaken only with an engineer.
Let s start with what i can see.
That can complicate things.