Bridge Rivets
Bridge Rivets
(OP)
I have an historic bridge where select rivets are to be replaced with high strength bolts. New bolt heads are required to have the appearance of the existing rivets (on both ends of the bolt). Anyone have any experience with this kind of bolt? Does it exist?
Thanks.
Thanks.






RE: Bridge Rivets
RE: Bridge Rivets
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www.SlideRuleEra.net
RE: Bridge Rivets
The only thing that will look like a rivet on BOTH sides of the connection is...a rivet.
I don't recommend trying to find a modern-day riveting crew.
So get an F 1852 button-head bolt and put the head toward the more visible side of the connection. Historic bridges all over the country have had rivets replaced with bolts, and the travelling public has not been injured in any way by the appearance of hexagonal nuts on one side of the connection.
Eng-Tips policies: FAQ731-376
RE: Bridge Rivets
RE: Bridge Rivets
For a 7/8" bolt or nut, distance across the flats is 1 7/16". That's 1.66" tip to tip. Nut height is 55/64". Doing a little hand sketch of what seems to be an appropriately proportioned dome, I think you'd need to add another 3/4" to the radius of the dome, which brings you up above 3 inches in diameter.
Repeating the exercise for a 1/2" bolt (7/8" head, 31/64 nut height)...I get a dome about 2" across.
Eng-Tips policies: FAQ731-376
RE: Bridge Rivets
like you are speaking of would have the strength
of the original rivets. Regular bolts and nuts
would of course and I think they tighten them
to yield. That used to be the practice. I do not
think you could do it with a thin nut head.
How do you drive such parts if the nut head does
not have a slot phillips or hex head or whatever
to restrain or tighten the parts.
RE: Bridge Rivets
Hg
Eng-Tips policies: FAQ731-376
RE: Bridge Rivets
RE: Bridge Rivets
Hg
Eng-Tips policies: FAQ731-376
RE: Bridge Rivets
RE: Bridge Rivets
They are neat, weather-resistant, quite positive in locking and come in a good range of sizes.
Huck bolts have been used to give a good rivet-like appearance on one side. Other side apppearance is somewhere between bolt and rivet
RE: Bridge Rivets
Hg
Eng-Tips policies: FAQ731-376
RE: Bridge Rivets
RE: Bridge Rivets
Because otherwise, my point is that you can't just do a standard AASHTO analysis of the connection and assume that's what you have.
Hg
Eng-Tips policies: FAQ731-376
RE: Bridge Rivets
also, one should realise that the sole function of a large portion of rivets is to stitch sections together so tightly that rust penetration is minimised
RE: Bridge Rivets
FYI, noise restrictions in Socal have made the TC fastener system viable and cost effective. I have no personal experience with A490 in the TC, but I am told they are now in use.
Rod
RE: Bridge Rivets
ASTM F 2280 is the brand shiny new (April 2006) TC equivalent to A 490.
Hg
Eng-Tips policies: FAQ731-376
RE: Bridge Rivets