Strip Footing: Transverse Steel Slways Necessary?
Strip Footing: Transverse Steel Slways Necessary?
(OP)
Let's say you have a small continuous strip footing (wall footing), with a very nominal (small) load. Something like 16" wide x 12" deep with an 8" CMU wall bearing upon the footing.
Granted you'll have at least 2 continuous #4 bars longitudinally, but is it really necessary to have transverse bars perpendicular to the longintudinal steel? Do the shrinkage & temperature requirements apply here, even though the footing is below frost depth? Granted there is shrinkage taking place during drying/curing, but it seems a small issue given the small cross section of the footing.
The ACI code doesn't seem to properly address this type of situation. Upon reviewing similar constr. docs. on various projects, sometimes the transverse bars will be spec'd, sometimes not.
Of course, the contractor never wants to put these in, and many times they just leave them out.
This is a question I've been trying to answer for some time, but cannot find any definitive info.
I welcome anyone's input.
Thanks.






RE: Strip Footing: Transverse Steel Slways Necessary?
Thanks.
RE: Strip Footing: Transverse Steel Slways Necessary?
It is not an ACI requirement but I think that it is needed to assure that the longitundinal bars wind up where you want them.
RE: Strip Footing: Transverse Steel Slways Necessary?
Shrinkage/Temperature steel requirements per Section 7.12 seems to be intended for "slabs" although I see it as a general practice by many to use these ratios for elements other than slabs.
RE: Strip Footing: Transverse Steel Slways Necessary?
Dik
RE: Strip Footing: Transverse Steel Slways Necessary?
Dik
RE: Strip Footing: Transverse Steel Slways Necessary?
DBD
RE: Strip Footing: Transverse Steel Slways Necessary?
RE: Strip Footing: Transverse Steel Slways Necessary?
Another thing I have noticed is that the structural design software we use at our firm always calls for transverse bars in a strip footing design no matter how small of a footing or light of a load. It always puts in .0018 x gross area for the transverse steel. I guess the engineers at the software company are being ultra-conservative.
RE: Strip Footing: Transverse Steel Slways Necessary?