On a bridge of this scale I couldn't add handrails or really any details that you may get on a larger bridge.
I also won't go into too much detail because, with the possible exception of the beam bending, this is just as simple as it looks.
The cost of the timber was £20 and it took me about 3 afternoons to build and install.
Step 1: Materials
The size and design of the bridge will have to fit the garden, this is a small garden so I made the bridge as slender as possible so as not to overpower its surroundings.
I used sawn treated pine, very rough cut pieces but they're cheap and treated to make them more durable.
- 19x32x2400mm, 8 pieces, these will form the curved beams, I only need 2 but it's good to have lots of spares
- 19x100x2400mm, 3 pieces, I sawed these planks in half to give me 50mm width planks, this was mainly to save money.
alternately just buy 19x50mm planks.
- Wood Glue, I recommend Evo Stick because the strength of the curved beams will depend a lot on the glue.
- Wood Screws, get exterior grade to ensure they don't rust away.
- Plastic Stakes, large plastic stakes to secure the bridge to the ground
This depends entirely on how good a finish you want to put on your bridge.
Basic Tools: Timber Saw, Drill, Mallet.
Finishing Tools: Plane, Power Sander / Sand Paper, Router.