I not sure what you mean "dimjim" by 'one bolt length'. Total length of the bolt is about 1 meter and most of that is embedded in concrete. Could you explain to me what you mean by 'one bolt lenght'?
I am dealing with a bolt-ring consisting of 24 bolts. The bolts are D=30mm and about 1 meter long and embedded in concrete and are welded fast at the bottom end (the concrete is clamped between two bolt-rings). I need to pretension the bolts and I am wondering what the effective length of the...