Reinforcement laps in continous footings
Reinforcement laps in continous footings
(OP)
Hi folks!
Ive found few articles where a general rule of laping reinfrocement in continous footing is done by providing corner bars and laping them at the outsied face of the footing like in the link here:
see rebar laps in plan view
http://www.beforethearchitect.com/Articles-FDN%20R...
Why cant rebar be lapped with same principals that are give for beams:
http://www.buildinghow.com/Defaultnew.aspx?ch=53
Ive found few articles where a general rule of laping reinfrocement in continous footing is done by providing corner bars and laping them at the outsied face of the footing like in the link here:
see rebar laps in plan view
http://www.beforethearchitect.com/Articles-FDN%20R...
Why cant rebar be lapped with same principals that are give for beams:
http://www.buildinghow.com/Defaultnew.aspx?ch=53






RE: Reinforcement laps in continous footings
Dik
RE: Reinforcement laps in continous footings
Agree with you on that but I would always provide minimum reinforcement in the longitudinal direction since the load on the strip is never of the same intensity (door openings, garage doors, Windows, soft spots under the strips).
This can all couse bending moments, not big, but just to be shure.
RE: Reinforcement laps in continous footings
RE: Reinforcement laps in continous footings
The first detail is used for concrete section with closing corner; normally the bent bar in the corner will have larger bent radius to avert bearing problem inside the bent bar. I don't see the need to provide this detail in strip footing unless in-plan bending is expected.
HTH
RE: Reinforcement laps in continous footings
If long bars are req'd, then I usually place them at the location of the wall dowels... The steel placer often has support bars at the outside edge if required. For strip footings, often have plain concrete for residential type work.
Dik
RE: Reinforcement laps in continous footings
RE: Reinforcement laps in continous footings
"The first detail is used for concrete section with closing corner; normally the bent bar in the corner will have larger bent radius to avert bearing problem inside the bent bar. I don't see the need to provide this detail in strip footing unless in-plan bending is expected."
You mean bending moment in the longitudinal direction?
But a narrow strip will only "bend" in longitudinal direction.
RE: Reinforcement laps in continous footings
See attached diagram showing plan view of a concrete section with closing corner. This kind of in-plan bending could happen if the strip footing is attached to a retaining walls.
RE: Reinforcement laps in continous footings
this would apply in a ending column to beam situation and not in the footing.
RE: Reinforcement laps in continous footings
Dik