Tom wrote:
* wrote:

Tom wrote in article
...

Ned Simmons wrote:

http://think2020.tripod.com/photo.htm

2000+ years and still working...Whereas I-35W was 40?




Are you suggesting that the 2000 year-old bridge withstood dozens
of 100,000 pound trucks on a daily basis througout its lifetime?

Most of today's Interstate bridges would last forever if we
didn't use them!!!!!

Apples-to-apples, please.

Truly you're a star! However, your reasoning will terrify millions
of Americans as you're saying that US bridges of the "modern" era
don't have any load capacity redundancy. I notice that there is a
fast growing prevalence in the US for people to employ drivers to
get them across bridges, your doing?

Odd that you go from a single specific situation on the Chesapeake Bay
Bridge to "a fast growing prevalence in the US".

As for the 2000 year bridges, they did what they were designed to
do with a safety redundancy that sees them still standing. I think
there's been odd American, John A Roebling springs to mind, who
have been able to do this.

I don't know of any current engineer who would design a bridge for
common use that was intended for foot, horse and ox traffic as they
were 2000 years ago.

So you're saying that 2000 years ago, they built bridges that can take
the stress of many 18 wheel semi trailer trucks daily without regular
inspection and maintenance, and that there have been NO failures of
any of these bridges?