Reducing Wall Thickness

In tall structures, it is necessary to reduce the wall thickness peri­odically to reduce the weight of the structure and to save in the volume of concrete. Whenever a reduction in wall thickness is re­quired, a board is placed on the inside of the forms thereby reduc­ing the thickness of the wall. When the reduction is on only one side of the wall, the jacks will not be in the center of the forms and the pull on the yokes must be balanced.