[quote=@ShidenBlades]
How wide are these bridges? 
[/quote]

Are you asking length or width? The width is stated in the OP. About 9 inches (0.75 feet). 

[@Drifting Pollen]

How long are both bridges btw?

[h3]Add on:[/h3] Also, I assume the bridges can hold both their weight? There's not a max weight limit, is there? ShidenBlades, any thing else you can think of, you might want to pipe up so I can officially update the OP with this stuff.