I constructed it using wood, styrofoam and PVC tube. Even though the pillars are quite big (much bigger than I had actually planned), they are quite light and easy to transport. The entire assembly is easily put together and taken apart.
- 34 x 34 mm lumber, 210 cm long, 5 pieces
- 12 x 44 mm lumber, 210 cm long, 7 pieces
- Styrofoam slabs, 2 cm thick, 50x100 cm
- Styrofoam slabs, 3 cm thick, 50x100 cm
- Liquid nails
- PVC glue
- PVC tube, 40 mm diameter, about 6 meters
- PVC couplers, 40 mm diameter, 4 pieces
- 135° PVC elbows, 40 mm diameter, 4 pieces
- PVC screw-on endcaps, 40 mm diameter, 2 pieces
- Saw (electric, or as in my case, handsaw and miter box)
- Paint and paintbrushes
Step 1: The wooden frame
- 100 cm long, 34 x 34 mm, 8 pieces (vertical supports)
- 50 cm long, 12 x 44 mm, 8 pieces (horizontal supports)
- 52,4 cm long, 12 x 44 mm, 8 pieces (horizontal supports)
Out of a single 12 x 44 mm piece, I cut 2 50 cm and 2 52,4 cm long pieces, so 4 of these were needed for this part, along with 4 34 x 34 mm pieces.
I made 4 frames, using 2 50 cm long 12 x 44 mm pieces and 2 100 cm long 34 x 34 mm pieces. It is very important that all angles are 90°, or the entire construction will be wobbly and unstable! Connect 2 of these frames together with 52,4 cm long pieces, so it forms a box. Again, make sure all angles are 90°! I made 2 of these boxes.
Next, a support for the arch was needed. A piece of PVC tube is mounted in the box for this. A coupler will protrude from the top of the pillar, so the arch (wich will be modular, to make it easier to transport) simply slides in. But first, I had to make something to attach the tube to! For this, I cut another 4 50 cm long 12x44 mm pieces, and 4 52,3 cm long pieces. I attached them to the frame at 40 cm from the top. Next, I cut two 50 cm long 34x34 pieces, wich I used to bridge the center of the box. This will form the support for the arch.
That's for the bottom part of the support, but I also needed a support for the top. Here it's very important to work accurately, because otherwise the tube won't be vertical. I cut 4 50 cm long 12x44 mm pieces, and bridged the top of the box with them, with 4 cm of space between them. From leftovers of the 34x34 mm pieces, I cut 4 4 cm long pieces, wich I used to attach the two pieces together. You can see what I mean on the picture. You end up with a 4x4 cm hole the tube goes through.
The frames are ready, now it's time to install the PVC tubes! They are attached to the bottom support using a screw-on endcap. The endcap assembly consists of two parts: the cap itself and a threaded piece that's attached to the tube with a coupler. The cap is nailed to the bottom support, in the center. The threaded piece is glued to a 60 cm long piece of 40 mm PVC tube.
Next, the tubes are inserted through the top supports, screwed on the bottom supports, and secured to the top support with nails through the tube. All that was left now was topping the tubes with a coupler. The arch will be inserted here.