How did they build stone bridges over huge rivers, like the Danube, before they had heavy machinery?

Question

How did they build stone bridges over huge rivers, like the Danube, before they had heavy machinery?

Answer 1

Likely they used a variation of the ancient Roman method of building arches supported by wooden frames until the keystone (at the top of the arch) could be inserted giving the arch its own durable strength.

Answer 2

Also if you're talking about roman bridges they were great engineers. Roman's had primitive man powered cranes that they would put on log rafts and use those to assist with heavy lifting.

Answer 3

LOL - what a sturdy question! What little ones are utilising & utilising heavy equipment?!? nicely there became that one 6-yo who tried to rigidity the kinfolk automobile to Applebee's to get some fowl strips. i wager they ought to positioned the warnings to lead clear of any ability proceedings!

Answer 4

yes human powered cranes plus a very smart approch to the use of folcrum points and levers

Answer 5

they imported labor like today's businesses do, of course

Answer 6

one stone at a time..............

Answer 7

uhhhhhh......manpower......ya think?