It's frightening to believe that one tractor trailer can completely destroy
a major Interstate Bridge. Such exposure to the vulnerability of America's
crucial infrastructure only makes America open to terrible terrorist
exploitation leaving millions of people and the economy at risk an new insidious
way. Unfortunately it seems military power may not be the best way to address
terrorism...perhaps looking at the deeper root causes of terrorism, the
religious intolerance, the income inequality, and cultural and racial prejudice
may be places to start looking for solutions.
A beam (a non-load bearing one!) slightly lower than the bridge's
supporting beams at both sides that a too-tall vehicle would hit first (and
hopefully go no further) should be sufficient, wouldn't it? Otherwise, it
would be cost prohibitive and we know the pol's in DC won't want to
give up our hard earned (but easily taken) tax monies for this.
"State Patrol Chief John Batiste blamed it on a tractor-trailer carrying a
tall load that hit an upper part of the span."=================When I saw the news pictures of the collapsed
bridge it was clear that it was designed as a truss structure which means that
it depended on the mutual support of each of the truss members. And, as a chain
in only as strong as its weakest link, under certain conditions, an entire truss
structure can fail when only one or a few of its members fail.Trusses are designed to primarily support tensional/compressional loads.
Having the truck's load hit one or more truss members on the side
introduced a lateral/torsional load that was, apparently, sufficient to
break/bend it enough to compromise the structural integrity of the entire truss
structure.I doubt it was a problem of the bridge's design or
construction per se. But, it's clear that there weren't sufficient
precautionary measures to prevent this from happening. Maybe they'll
install a load size monitoring system, whether physical, electronic or some
combination, to prevent this in the future.
Well, we are heading to Vancouver, BC in three weeks. We are planning to stay at
Bremerton, WA (accross the bay from Seattle) and wondering what is the altinate
route? Anyone know?
Up until recently, I used to cross this bridge on I-5 fairly often. It's a
busy stretch of freeway that connects two towns separated by the river. It
really is a miracle that no one was killed.
Having lived in countries where there is a lack of laws and enforcement,
freeways collapse from companies skimping on concrete and rebar, licenses
aren't checked and drivers qualifications are necessary, this is sort of
sad. We live in a country that has lost people in public and private areas
without integrity. This is endemic in a lot of the world but is appearing on
the shores of our country. There are more cases now of vehicles hitting
overpasses or bridges that connect our non-Internet highways, literally.
Drivers are to know their load height and weight. They sometimes even take
backroads to get around the normal weigh and check paperwork stations. When the
top people in government think they can get around the laws they are supposed to
enforce, then the citizenry believe they can do the same. They won't get
caught. This driver may have done almost everything and no one will notice he
didn't complete all his checklist items before going down the highway.
This is a well traveled route, especially on Memorial Day and now the summer
tourists will be impacted.Is medical marijuana okay for CDL drivers
while on and off duty?