Step 1: Get Your Supplies
I got everything I needed at Lowes.
Step 2: Open Pipe and Pull Out Bags
Open the pipe package and stretch the pipe out to maximum length. It should be just about 25' long.
Pull two bags from the box.
Step 3: Cut Eight Legs
Each leg will be about 3' long. Use a utility knife to cut each one all the way around at the bottom of the fold. Be sure the pipe pleats are fully extended when you measure.
Step 4: Mark and Drill the Plywood Base
Make two lines with a felt tip marker parallel with each long side. The first line is 1/2" in and the second line is 1" in. Then measure 2" in from each end and make a mark. Then make a mark 9.5" in from each end.
Drill 3/16" holes where each line overlaps. These 16 holes are for the cable ties.
Step 5: Use Cable Ties to Attach the Legs
Do this for all eight legs. And then compress the legs as shown.
Step 6: Add the Feelers
Mark two holes where each feeler approaches the edge of the plywood. Drill and tie the two ends as shown in the Photo.
Step 7: Slip Bags Over the Plywood Base
Starting from the feeler end, slip the two bags over the plywood, feelers and legs. Work the bags all the down so they pull against the feelers.
Step 8: Push Feelers and Legs Through the Bags
Push the feelers through the bags and slide the plastic up to the plywood. The feelers should stick out of the front as shown.
Make sure the bags are both smooth over each foot and cut a small hole through the bags centered over the foot pipe. Expand the hole just enough to push the leg through and pull it through. Do this for all eight legs.
Step 9: Bend 1/2" EMT
I took a 10' length of EMT and put in a 90 degree bend starting 4.5' from one end. This end goes down into a vertical tube on the back of my trike. (You can probably get Lowes to bend the EMT for you if you don't have a bender.)
Then I drilled two 1/4" holes through the EMT. One was 2" from the far end and the other was 18" from the far end. These were drilled in line with the vertical bend.
Insert the EMT into the trike and hold the plywood base over the EMT. Drill 1/4" holes through the plywood base over each hole in the EMT. Use two 1.5" carriage bolts to mount the plywood base on the end of the EMT.
Step 10: Fill With Newspaper
I thought the legs were kind of droopy so I put a 40" piece of 1" plastic pipe through each leg midsection. These four cross braces stiffened the legs and made them look better, but they are optional.
Then tie the bags closed.