85' Long Residential Footing and Stem Wall Design

[engineerED930]

Can anyone direct me with a resource for designing a RC footing and stem wall for a house 85'x35'? I'm not concerned about dead and live loading as I am about the length of it. What kind reinforcing should be considered to resist the torsional movement it will see?

Thank you in advance for your time and input.

 

[jhnblgr]

Expansion and contraction joints and maybe some pilasters.

 

[jayrod12]

What torsional movement would you be getting on a footing and stem wall? If this is one of those where the stem wall cantilevers from the footing and they install a partial height wood wall above, then I would call that more overturning moment than torsion, but that's semantics.

A drawing with some sizing and loading may help clarify things.

I agree with @jhnblgr regarding at least control joints. Where I practice it's quite regular to see perfectly vertical cracks in foundation walls that exceed 35 feet long at about mid length of the wall, or two cracks at third points. Treat your wall like a slab for just a second, how often are you providing control joints in a lightly reinforced 8" thick slab on grade? Likely somewhere around 16-20 feet on centre. That's to control the shrinkage cracking. I fail to see how a wall is any different.