A lacrosse net attaches to an upright, 6-foot-by-6-foot square frame that has a 7-foot deep triangular base in back for support. The net covers the sides, top and back of the frame, and the full size opening faces the field of play. The bottom of the opening is unobstructed by a frame member to allow a ball to roll into the goal. The netting is 1 3/4-inch nylon mesh that can be fastening to the frame with nylon ties. PVC pipe is a sturdy weatherproof frame that can be painted regulation orange to provide a clearly defined goal.
Apply PVC primer and cement to the end of a 6-foot length of 1 1/2-inch PVC pipe that will be the top of the frame. Attach a 90-degree elbow to this end of the pipe. Attach the other 90-degree elbow to the opposite end of the pipe temporarily. Do not cement it to the pipe.
Measure from the outside of the first elbow to the outside of the temporary elbow. The overall length will be in excess of 6 feet. Note the amount of excess and remove the temporary elbow. Cut the excess amount off the end of the pipe and cement the elbow to the end so it is facing the same way as the opposite elbow.
Prime and cement two 6-foot lengths of PVC pipe and insert them into the elbows at each end of the frame top piece. These are the sides of the frame. Attach the standing port of the 45-degree elbows to the end of each leg temporarily.
Measure the overall length of the sides from the outside of the elbows on the top piece to the outside of the 45-degree elbows and note the excess beyond 6 feet. Remove the 45-degree elbows and cut the excess off each side piece. Prime and cement the standing ports of the elbows to the sides, with the 45-degree angle ports facing toward the inside of the frame.
Prime and cement 7-foot lengths of PVC pipe into each of the angled ports of the 45-degree elbows. These are the base supports of the frame. Attach the triangle coupler to the end of one base support temporarily. Measure from the outside of the 45-degree elbow to the outside of the triangle coupler and note the excess beyond 7 feet.
Remove the triangle coupler and cut the same amount of excess off each base support. Prime and cement the ends of the base supports and insert them into the triangle coupler to complete the frame. Paint the frame with orange epoxy paint.
Cut a piece of 1 3/4-inch knotted nylon netting 18 feet long and 10 feet wide. Use a nylon tie and attach one corner of the 18-foot side of the netting at a bottom corner of the square frame. Continue to attach the netting up the side, across the top and down the opposite side of the face frame with nylon ties at 3-inch intervals.
Pull the center of the 10-foot side of the netting to the point of the triangle base and attach it with a nylon tie. Pull the sides of the netting down and attach them to the sides of the base with nylon ties at 3-inch intervals. Trim the excess netting with scissors.