Frangible Concrete Reinforcing
Frangible Concrete Reinforcing
(OP)
I have recently come across a specification for "frangible" rebar in a concrete footing. Does anyone have any info on "frangible" reinforcement? I have googled it and called a couple suppliers and can't find any explanation.
Thanks!
Thanks!






RE: Frangible Concrete Reinforcing
RE: Frangible Concrete Reinforcing
readily or easily broken (Longman's)
Normally we are looking for ductile steels for reinforced concrete. Fragile the concrete is. Then, the high strength steels attain lower elongation over "yield" point. It is more than enough, anyway, to make noticeable any cracking that not progresses thunderously to failure. And frangible steels (as some cast irons and old irons are) are routinely specified for vertical signing posts, where it is preferred the sign be ejected by the impact than hammering the vehicle in whipping action.
So ... except that someone has wanted to signal that the steel standing in the footings is not ductile, it would be a funny note, because most would put such class of steel or HS steel directly, instead.
RE: Frangible Concrete Reinforcing
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RE: Frangible Concrete Reinforcing
RE: Frangible Concrete Reinforcing
RE: Frangible Concrete Reinforcing
I don't know about the terms or possible miss-spelling, but could be the intent. You don't want the blow-out walls to be too strong even though we engineers usually like the "belt and suspenders" philosophy to provide redundancy.
Dick
RE: Frangible Concrete Reinforcing
RE: Frangible Concrete Reinforcing
RE: Frangible Concrete Reinforcing
Seems we have crossed paths before, generally in an agreeable fashion. But, the idea that you expect I should be able to count too, is pushin it a bit too far, you are gettin downright disagreeable. We are gettin closer, 7 now, I was anticipating 10 before timbercharlie looked again.
RE: Frangible Concrete Reinforcing
RE: Frangible Concrete Reinforcing
The loose spec is probably too vague and unenforceable without any further definition or request for clarification.
Dick
RE: Frangible Concrete Reinforcing
RE: Frangible Concrete Reinforcing
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Frangible Concrete Reinforcing
RE: Frangible Concrete Reinforcing
Not only I have no idea about what it could mean, I am extremely curious now about what it is!