From here PHOTO - CHICAGO - ELEVATED - UNDER CONSTRUCTION - EARLY 1890s - READY FOR 1893 WORLD'S FAIR
It is often argued "Horses and carts didn't built this/" well here is a superb example of man, horse and cart working in conjunction with a temporary machine to show just how naive that argument is.
The machine is a travelling crane which is made from wood and steel and it travels along the rails as the overhead track progresses through the street constructing the next section its going to travel on. Once complete all traces of the clever machine vanish as it is dismantled save for photographs we would have no idea "how" it was done. Once such common sense solutions are accepted and applied to other constructions many remain mystery no more.
Just found this site. How Chicago's Loop came to be
Which carries a much larger image. https://arc-anglerfish-arc2-prod-tronc.s3.amazonaws.com/public/FMF24MONTRDCPKJMBX26TUNUGM.jpg
It is often argued "Horses and carts didn't built this/" well here is a superb example of man, horse and cart working in conjunction with a temporary machine to show just how naive that argument is.
The machine is a travelling crane which is made from wood and steel and it travels along the rails as the overhead track progresses through the street constructing the next section its going to travel on. Once complete all traces of the clever machine vanish as it is dismantled save for photographs we would have no idea "how" it was done. Once such common sense solutions are accepted and applied to other constructions many remain mystery no more.
Just found this site. How Chicago's Loop came to be
Which carries a much larger image. https://arc-anglerfish-arc2-prod-tronc.s3.amazonaws.com/public/FMF24MONTRDCPKJMBX26TUNUGM.jpg