ARCH BRIDGES

Here’s the arch bridge that’s part of the 8 bridge kit.

I always liked arch bridges so I used 32 bridge beams to build this larger arch.

Here’s a view of the 2 arch “ribs” that lean towards each other and are connected at the top with a 1×4.

There’s a lot more info about arch bridges, how they work, ancient Roman arch bridges and the formulas to compute how much tension is in the tie at;