Standard Hooks for #18 Rebar
Standard Hooks for #18 Rebar
(OP)
Are there any codes that prohibit specifying a 180 degree hook for #18 rebar or recommendations against? I have received a recommendation from a fabricator against a 180 degree hook for #18 rebar stating it will put undue stress on the bar, risking breakage.






RE: Standard Hooks for #18 Rebar
RE: Standard Hooks for #18 Rebar
The 180 degree is a standard hook, and on a #18, it should be about 2'-4.5" out-to-out. Bending a 180 requires the same forces as bending a 90, since the additional bending is performed on an additional length of bar. The hard part is actually bending a hook that big, and even starting a bend in a bar that big requires very large forces.
(And higher grade bar requires substantially more force.)
RE: Standard Hooks for #18 Rebar
Heating won't necessarily reduce the strength. You just have to make sure it cools down very slowly. A bar that large, however will have a pretty big quenching effect, so it may be pretty difficult to get it done properly.