I would expect that the full size machines were riveted with hot rivets That way the rivets deform to the hole size and grip more tightly by contraction when cooled.
An old tractor, I have, has a set of spade lugs (bolted on the steel rims). It had a fair number of lugs which had come loose and were either bent and/or had enlarged the bolt holes in the rims. This is an agricultural machine but would occasionally have been driven over hard standing – really uncomfortable for the driver, so not done at speed! Some steam engines may well have been used on metalled roads for a large part of their lives.
Edited By not done it yet on 05/03/2019 17:28:11