The load-deformation behavior of short prestressed concrete columns was studied by testing twenty-three columns under axial load. The primary test variables were the type and the amount of lateral reinforcement. The types of lateral reinforcement investigated included: (a) conventional ties, (b) continuous square spiral, and (c) welded wire fabric. For each type of reinforcement, the lateral reinforcement percentages studied were 1.09, 1.46, and 2.18 by volume of the concrete core. Neither the type nor the amount of lateral reinforcement was found to have a significant effect on the peak load capacity of the prestressed columns. However, after the columns reached their maximum load, the lateral reinforcement played a significant role in improving the deformation and the load carrying capacity of the columns The confinement provided by the continuous square spiral was comparable to that of individual ties at smaller spacing. As the tie spacing increased, the continuous square spiral became less effective in confining the column. The welded wire fabric can be as effective as any other type of lateral reinforcement provided proper anchorage details are developed.
