FYI - probably not the best idea to put a "raw" email adress on the internet. Easily picked by spam bots.
Going from a picture to a dimensioned drawing (suitable for construction, yes?) isn't going to give a high quality drawing. The best you can hope for is to generically trace the important "bits" from the image using Raster Design or something similar, along with written dimensions on a field sketch. For higher levels of accuracy you need to go to lasergrammetry.
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