TehMightyEngineer
Structural
- Aug 1, 2009
- 3,073
Trying to be a hero for a customer, we have an old, cast-iron LeBaron "heavy duty" LS368 36"Ø manhole frame and cover. It's for a smaller municipal airport but they want it to be rated for a 100,000 dual-wheel aircraft load. The LeBaron catalog we have does not indicate what "heavy duty" is and with the foundry out of business I doubt we're going to easily find a rating for this.
I'm prepared to run the numbers on it but it's thicker than similar typical cast aircraft rated manholes covers and I suspect is has more than enough capacity.
It's obviously much more attractive to just hand it to the customer and not delay the construction while I work up an FEA model. So, does anyone have any historic LeBaron Foundry documentation running around their libraries that lists a capacity for this frame and cover?
Professional and Structural Engineer (ME, NH, MA)
American Concrete Industries
I'm prepared to run the numbers on it but it's thicker than similar typical cast aircraft rated manholes covers and I suspect is has more than enough capacity.
It's obviously much more attractive to just hand it to the customer and not delay the construction while I work up an FEA model. So, does anyone have any historic LeBaron Foundry documentation running around their libraries that lists a capacity for this frame and cover?
Professional and Structural Engineer (ME, NH, MA)
American Concrete Industries
