I take it that you are doing a 2D elevation. Draw a fish scale and use the "Linear Array" tool to duplicate it setting a zero spacing in the spacing data box and dragging the fish scales out. To create the offset row select all the scales, hold down the option key and drag a copy to place offset from the first row. Use the option copy method to make as many rows as needed. Use the gripper tool to set the scale. Select all the arcs, the select mask tool set to arcs only will help with this. Once set to arcs only, drag a fence around them and enable the gripper. The yellow box on the gripper arrow is the scale adjust. Individual arcs can be added, deleted, or trimmed as needed to make each row the correct length.