Hello I would like to add some unconditioned storage room in my attic,maybe later on down the road add on a room and a dormer. My house was built in 1948 2x4 roof rafters 24inches on center 177inches long, peak height is 9 foot. Ceiling joist are also 2x4. Currently there are braces from mid way through the rafter to the center of the attic no purlin. I would like to remove the braces and add a knee wall and collar ties in its place. I dont know how high the knee wall needs ton and how low the collar ties will be to support the roof. please see the attached pics and feel free to contact me for additional information
Thank You
John
Thank You
John