Hooks for single mat footing , cantilever beam
Hooks for single mat footing , cantilever beam
(OP)
is it required for a single mat footing to be hook at the ends of the Rebar?
I have seen some engineers practice those kind of procedure. . but is it really required?
and also is it required to hook all top bars of the cantilever beam at the tip of it?
I have seen some engineers practice those kind of procedure. . but is it really required?
and also is it required to hook all top bars of the cantilever beam at the tip of it?






RE: Hooks for single mat footing , cantilever beam
RE: Hooks for single mat footing , cantilever beam
I would say that there is not a theoretical need for the hooks unless there is concentrated load of some sort at the edge of the footing that creates a condition whereby flexural demand for than rebar grows faster than the rebar is developed without the hook. Maybe a column or wall at the footing edge. This tends to be somewhat of a regional thing. In some parts of the world, footing reinforcement gets hooked all the time as a matter of perceived good practice.
Almost the same answer. In theory, you could omit the hooks if the cantilever load is purely uniform (no concentrated load at the tip). In this instance, however, it's been my experience that everyone, in all parts of the world, chooses to hook the top bars as a matter of good practice.
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Hooks for single mat footing , cantilever beam
RE: Hooks for single mat footing , cantilever beam
On mat foundations we don't either unless the load is directly at the edge of the mat. Most times for buried vaults with mat base slabs our mat extends out from the exterior face of the wall enough that the bars don't need hooks along the edge.
For cantilevered structural beams and columns we do typically hook at the edge.
Check out Eng-Tips Forum's Policies here:
FAQ731-376: Eng-Tips.com Forum Policies
RE: Hooks for single mat footing , cantilever beam