Use a tape measure to measure the following lengths on a 10-foot piece of 1/2 inch PVC pipe -- You will need almost 16 feet of pipe to make one hurdle. PVC pipe is usually sold in 10 foot lengths – 1 by 40 inches, 8 by 3 inches, 2 by 29 inches, 2 by 18 inches, and 2 by 2 inches. Use a fine tip marker to mark the lengths.
Use a hack saw to cut the pieces of pipe.
Gather the following ½-inch PVC pipe connectors: two T connectors, two 90-degree elbow connectors and eight straight connectors.
Assemble a 30-inch hurdle by twisting an 18-inch piece of pipe into one of the straight ends of the T connectors. Repeat for the other T connector. Twist a 2-inch piece of pipe into the other straight end of the T connector. This forms the base for each side of the hurdle.
Twist a 29-inch piece of pipe into the T fitting – the one in the middle – of each T connector. This forms the upright of each side of the hurdle.
Twist a 90-degree elbow onto each end of the 40-inch piece of pipe. This forms the top crossbar of the hurdle. Push the open ends of the crossbar elbows onto the ends of the uprights. You now have a complete 30-inch hurdle.
Make a taller hurdle by pulling the elbows and 40-inch piece of pipe from the uprights of the hurdle. Add a straight connector and a 3-inch piece of pipe to each upright, install the crossbar and elbows to make a 33-inch hurdle. Make taller hurdles by installing more straight connectors and 3-inch pieces of pipe to make 36-, 39-, and 42-inch hurdles.