Minimum size of principal rebar in concrete
Minimum size of principal rebar in concrete
(OP)
One of the more experienced engineers at our firm has made the comment that you shouldn't use 10M bar as the principal reinforcement in concrete. He maintains that 10M should only be used as ties and stirrups. The problem is, that it doesn't say this in the concrete code.
Has anyone heard this rule of thumb before? If so, do you know what the reasoning is for not using bars smaller than 15M as the prinicpal reinforcemtent?
Has anyone heard this rule of thumb before? If so, do you know what the reasoning is for not using bars smaller than 15M as the prinicpal reinforcemtent?






RE: Minimum size of principal rebar in concrete
Frequently used mesh reinforcement are around 10mm to 8mm.
Many codes do specify minimum diameter for compression reinforcement though.
RE: Minimum size of principal rebar in concrete
Using 15M bars often makes placement easier too as fewer bars can be used.
The code probably wouldn't specify a minimum as it would depend on the situation - more a matter of good practice for the location.