In this example we will add two 8 ft. by 12 ft. expansion loops in a 80 ft long run of pipe. Use Draw Joint icon 
and click on the first anchor point to add point/joint 16 ft. in the X direction along the longitudinal axis of the piping followed by a point 8 ft. in the X direction away from the point that was just added. Repeat those step in the -X direction starting from the anchor on the other end as shown.
