Steel bridges take a long time to build because of the precision of the work. The pieces have to fit perfectly together, or else the bridge will not be safe.
how long does it take to build a asimo
I toke two years to build
20
It takes 20000 day to build an oil rig.
3.5 years
Because it's a bridge and bridges take along time to build. If you don't like that, then try building you own bridge to see how long it takes you. (Didn't mean the in a mean way)
how long does it take to build a asimo
how long did it take to build the half moon
how long did it take to build the scottish parliment?
how long did it take to build cabot tower
building an arch bridge takes time.. depending on weather or climate. most bridges are completed between 10 to 15 years.
1 hour
hs2 will take 15 years to build
how long does it take to build a beam bridge of 2400 sq ft
it took 3 years
How long did it take to build st James cathedral london
a long time