The photo is part of a top plate of a girder on a small drawbridge that was built in 1922.
The structural girder runs from the abutment to the opening section of the deck and also serves to separate the vehicle deck from the pedestrian deck.
Two things are interesting to notice:
1. Many of the rivet heads are less than perfectly shaped.
2. Two of the rivets near the right end have been replaced with hexhead bolts. That may have been an 'expedient' repair, or maybe there once was some bracket or frame that once held a sign or something else that was mounted on top of the girder.
(CLICK ON PHOTO TO ENLARGE)
This should give the "rivet counters" a big headache - just proves there is a prototype for everything - and through the life of whatever it is - it can have bits added -removed -
Barney
The real problem is the detail freaks need to find a way to copy the rivet heads which aren't perfectly formed ;D
That's just you just have to rivet, then coincidence helps by itself. This happens by itself with soft copper rivets that are a little too long.
It gives the modeler some leeway, if not everything is always as perfect as expected in the prototype.
Bernhard