In Switzerland, arguably the world's experts in tunnel-boring, one death per tunnel kilometer is considered acceptable (and it is often less than that).
The much easier Channel tunnel has had around one death per five kilometer.
The Japanese Akashi Kaikyo Bridge prominently has had no construction deaths, which was considered extraordinary at the time. The Humber Bridge, which was the longest suspension bridge before Akashi Kaikyo, did cost four lives.
Construction is a dangerous business. You operate heavy machinery. You move large amounts of heavy material. You deal with power tools. Death is always a possibility - and that's something we IT folks tend to forget in our clima-controlled environments with our cozy desks and expensive chairs.
The US Death Rate per Capita is about .8%, so let's start there.
How many is it acceptable to die on the job? Well, there's hard stats on that - About 1M people work in construction[1], and about 1000 of them died on the job last year[2]. That'd be about .1% death rate on the job. Is that good enough? Probably not, but it's where we're at and what society accepts.
If 2,000 people worked on the Golden Gate Bridge for five years, it'd be an average construction project. It was a massive undertaking, but apparently poorly documented - There's no record of worker counts[1], but we do know the number of deaths - 11, of which 10 were from a single failure of a gantry.
Obviously more than zero, else we wouldn't attempt to build any bridge (or do anything else, like drive cars or fly planes) lest someone dies in the process...
What's acceptable (i.e. It's ok if 1 person dies on this project) is different than what's the potential risk (i.e. There is a risk that 1 person might die on this project).
And further there are trade offs. I don't know the trade offs of bridge building is but the example i've heard in the past is, it's possible we could make it so no one ever dies in a plane crash. To do that with today's tech might make flights cost 2x, 3x, 4x more. Flights cost more = more people choose to drive (say SF to LA or LA to Vegas or DC to NYC). More people drive = more deaths.
That isn't to say you shouldn't make things safer but you have to take into account is your change a net positive over all. I have no idea what the trade off is for bridges. The bridge arguably increase commerce which means its completion created jobs. Poverty is a top killer of people so more jobs = less death.
That said, one thing I'm happy to see on construction sites, at least for buildings, they put up fences on every floor so it's harder to fall out. My guess is that really only became possible when they could create the fences out of plastic.
DocTomoe|3 years ago
In Switzerland, arguably the world's experts in tunnel-boring, one death per tunnel kilometer is considered acceptable (and it is often less than that).
The much easier Channel tunnel has had around one death per five kilometer.
The Japanese Akashi Kaikyo Bridge prominently has had no construction deaths, which was considered extraordinary at the time. The Humber Bridge, which was the longest suspension bridge before Akashi Kaikyo, did cost four lives.
Construction is a dangerous business. You operate heavy machinery. You move large amounts of heavy material. You deal with power tools. Death is always a possibility - and that's something we IT folks tend to forget in our clima-controlled environments with our cozy desks and expensive chairs.
GauntletWizard|3 years ago
How many is it acceptable to die on the job? Well, there's hard stats on that - About 1M people work in construction[1], and about 1000 of them died on the job last year[2]. That'd be about .1% death rate on the job. Is that good enough? Probably not, but it's where we're at and what society accepts.
If 2,000 people worked on the Golden Gate Bridge for five years, it'd be an average construction project. It was a massive undertaking, but apparently poorly documented - There's no record of worker counts[1], but we do know the number of deaths - 11, of which 10 were from a single failure of a gantry.
[1] https://www.bls.gov/oes/current/oes472061.htm [2] https://www.constructconnect.com/blog/construction-worker-de... [3] https://www.mcall.com/news/mc-xpm-1987-05-21-2575677-story.h...
coldtea|3 years ago
refurb|3 years ago
What's acceptable (i.e. It's ok if 1 person dies on this project) is different than what's the potential risk (i.e. There is a risk that 1 person might die on this project).
spoonjim|3 years ago
gernb|3 years ago
That isn't to say you shouldn't make things safer but you have to take into account is your change a net positive over all. I have no idea what the trade off is for bridges. The bridge arguably increase commerce which means its completion created jobs. Poverty is a top killer of people so more jobs = less death.
That said, one thing I'm happy to see on construction sites, at least for buildings, they put up fences on every floor so it's harder to fall out. My guess is that really only became possible when they could create the fences out of plastic.
throw_a_grenade|3 years ago