How To Build A Simple Wood Bridge - Leonardo Da Vinci Style

Here's another great idea from Leonardo da Vinci or at least it seems like he's the individual gets the credit for this architectural design and engineering wonder. A simple bridge that could be built out of a variety of different size boards or even tree branches. Watch the video and if you're anything like me you will be amazed at how building a bridge can be so simple.

[kevinp]

Your video was very helpful. I used 2x6x10’s to span 25’ over a creek. Probably should have used 2x6x8’s. Would recommend making the cross pieces extend a couple of feet each side to brace the railing. Mine is 4’ wide. 3’ might have worked. The arched design raises the bridge over our creek so it shouldn’t wash away next heavy rain.

[freespeechordeath]

As always your video was a godsend man. You do good work👍 keep on keeping on brother!

[martyjoseph]

Exactly what I'm looking for to have an arched ramp up a few steps to lessen the upper angle and prevent (light) motorcycle parts from dragging, thinking 4-6' boards will get me there.

[HolyCrudCakes]

Look up rainbow bridges canada.. They have some pretty good looking bridges

[Valast]

Looks a bit different than those i build. (Maybe cus you used screws cus the leonardo bridge can actually hold itself without any extra planks

[restassuredworship]

how much weight can a 14 foot span with 2x4s handle though - i was thinking of making a bridge over a creek near our house with 2x12s bc i don't know how the math works and id rather over than under do it - any insight?

[someting]

I wanna build a house using only gravity fit. That would involve some more advanced maths tho.

[rupe]

While the design is quite clever, I wonder what an engineer would say about the loading for common dimensional lumber versus length. Seeing as each 12ft section is divided in half (6ft) for loading I would guess this can only hold a few hundred pounds per section without additional bracing. We're talking a safe load, so not to the breaking point of several fat people bouncing around. We also have to consider that a portion of the load on each section is transferred to the other sections, which will require a little math to make sure things are not overloaded in the next section.