Weld Transverse Shrinkage and Pre-Set
Transverse shrinkage per weld and total pull from the Blodgett relation (0.2 x weld area / thickness), and the recommended pre-set to lay the parts apart so the assembly cools to size. A screen; restraint, sequence, and a mock-up govern, and longitudinal/angular distortion are out of scope.
Formula and source
Transverse shrinkage per weld = 0.2 x weld area / thickness (the 0.2 coefficient is dimensionless; the area-over-thickness ratio carries the length); total = per-weld x weld count; recommended pre-set = total.
Transverse weld shrinkage - the Blodgett weld-area-over-thickness relation from Blodgett, Design of Welded Structures (James F. Lincoln Arc Welding Foundation), by name.
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