Cut all the PVC pipes to the necessary length. Measure using the measuring tape, then mark with the pencil. Use the hacksaw and cut straight to ensure snug fits with connecting pieces.
Construct the base. Prepare one extender by applying primer to the inside of one hub to a depth of 1 inch. Prepare the 20-foot section of pipe by applying primer to the outside of one end. Primer should extend 1 inch from the end and completely circle the pipe. Keep debris off the end of the pipe and let the primer dry for one minute.
Apply PVC cement over the primer on first the inside of the extender and then the outside of the pipe. Fit the pipe into the extender, turning the extender 1/4 turn while doing so. Hold in position for one minute to allow the cement to harden. Note: primer and cement should be applied in this same manner for every fitting.
Prepare the opposite end of the extender by applying primer to the inside of the hub. Prepare one end of a 2-foot section of pipe. Fit the pipe into the extender.
Apply primer and cement to the inner hub of one end of a 90-degree elbow and the opposite end of the two foot section of pipe using the same procedure used in the previous step. Fit the elbow onto the pipe. Note that when finished, the elbow should lie flat on the ground.
Prepare the opposite end of the elbow with primer and cement. Prepare the outside of one end of a 6-oot section of pipe. Fit the 6-foot section of pipe to the elbow.
Prepare the inside of another 90-degree elbow with primer and cement. Prepare the outside of the 6-foot section in the same manner. Fit the elbow onto the pipe. When finished, the open end of this elbow should be vertically aligned. Posts will later be fixed into the vertical section. Repeat these steps starting on the opposite end of the 20-foot section of PVC pipe.
Prime and cement the hub of a 90-degree elbow. Prime and cement the posts--the outside of one end of an 8-foot section of pipe. Fix the elbow to the pipe. Repeat this process using the last elbow and other 8-foot section of pipe.
Prepare one of the vertically positioned base elbows with primer and cement. Prepare the outside of the open end of an 8-foot section of pipe. Lift the pipe vertically off the ground and press it into the elbow, turning it a quarter turn while doing so.
Build so that the elbow at the top of the 8-foot sections of pipe, the posts, should face toward the center of the goal as it will later support the crossbar. Repeat the process while installing the opposite post.
Lay the other 20-foot section of PVC pipe on the ground. Prime and cement the inner hub of one end of an extender. Prime and cement one end of the 20-foot pipe. Attach the pieces. Prime and cement the inner hub at the other end of the fitting just attached. Prime and cement the outside of a 2-foot section of pipe. Attach the pieces. Repeat these steps on the opposite end of the 20-foot section to complete the crossbar.
Pull the posts to the ground with one person standing at each post. The 20-base will now be suspended.
Prepare the inside hubs of both elbows at the top of the posts with primer and cement. Prepare the outside of both ends of the crossbar. Fit the ends of the crossbar into the elbows. Do this with two people to make the job easier.