Weight capacity of my concrete/steel bridge?

[Streetcar]

I would limit the yield strength of the steel to 15 ksi. This will at least address some degree of degradation and lower material strength due to age. Steel has come a long way during the past few decades.

The bridge is not old enough to be lower than 36ksi

 

[deezler]

You lose the bet.

The length of the tracks on Cat 299D in contact with the ground is less than 6 ft.

I know, I looked it up and had it in my own post.

When I first typed that, I was picturing a tracked crawler loader or a forestry forwarder type machine, not a basic skid steer. (I didn't read the initial post well enough).

 

[2manyrocks]

After more inspection, I think these beams are a lighter gauge of metal than I first thought.

 

[paulsharvey]

After more inspection, I think these beams are a lighter gauge of metal than I first thought.

Yeah, I dont think it's worth the risk, to you or your contractor. I'm sure it would be fine, and I'm 80-90% sure; but that 10-20% is a big cost if your (i'm) wrong. Heck, maybe I'm 95% sure, but that means there is a 5% doubt