where is in aci rebar splicing in columns should not all be the same location?

[delagina]

i rarely do concrete column but i remember there is this requirement. i want to check if this also applicable for walls and mat footings.

 

[msquared48]

12.17.2.2 of ACI 318-05

Mike McCann
MMC Engineering

http://mmcengineering.tripod.com

 

[hokie66]

As columns are typically all spliced at floors, I don't understand the question.

 

[delagina]

is this alternate lap splice also applicable to mat footings?

 

[delagina]

bumping this just to check if anyone knows if there is anything in ACI about rebar splicing mat footing alternately. i dont think there is.

my draftsman alternately spliced my mat footing rebar even though i didnt say so. before i tell him it aint necessary, i want to be sure.

 

[hokie66]

Why change what he has drawn? Whether required by code or not in a given situation, it is good practice in a mat foundation, if the mat is large and the reinforcement is heavy.

I think the column requirement you are remembering may be for long columns, e.g. three storeys high unsupported where single length bars are not available.