When reinforcing cages for reinforced concrete structures are fabricat
ed by robots using tack welds to improve productivity, the ductility a
nd strength of the rebars are affected. This paper presents informatio
n on the effect of welds on the mechanical properties of rebars under
uniaxial monotonic loads. It is found in the study that welding reduce
s the ductility and strength of rebars, but that annealing is not nece
ssary from the standpoint of reinforced concrete design.