Inclined wall footing

Could you provide a sketch of the foundation? Thank you.

A sketch would be helpful here. How steep is the angle? If it was a shallow angle I would place the reinforcing vertical. If the angle is steeper (>10° or so), then I would probably place the reinforcing perpendicular to the base of the wall. In either case, the longitudinal reinforcement should run perpendicular to the "vertical" reinforcement.

Both approaches may be considered appropriate, as long as the design is accomplished properly for each. If you use "vertical" reinforcing that is placed perpendicular to the base of the wall, the height of the wall in your design should be the height measured perpendicular to the base of the wall. If you use "vertical" reinforcing that is actually vertical, the height of the wall in your design should be the height of the reinforcing plus cover. You may want to contact the contractor and ask his opinion about ease of forming and placing steel. I would suspect that he would want to run the "vertical" reinforcing as I have described above. Hope this helps-

Yoderengineering

As with the more typical horizontal wall reinforcement, the generalized guidance for walls on a sloped surface would be to:

a) place the corresponding wall vertical rebars also in strictly vertical positions;

b) place the corresponding wall horizontal rebars also in strictly horizontal positions;

c-1) place the corresponding footing rebars in positions that are parallel to the slope;

or;

c-2) place the corresponding footing rebars horizontally in a "stepped" footing that "steps" up and/or down the slope, as appropriate.

While it is technically possible to (rotate) the rebar assemblies to match given slopes, it is not operationally effective to do so. (Construction should not be made into "rocket surgery", if it can be avoided at all...)

In any case, take the time to do all construction in conformance with all local and other applicable jurisdictional Codes and authorities, and get all appropriate inspection permits and approvals as your work progresses.

Lastly, try to take digital pictures of your work progress to document what you did, and did not, do, or have contracted to be done.

Hopefully, this was helpfull. In any case, good luck with your wall.

Thank you very much for your answers. I was both concerned about the method of calculation and the ease of construction, since the walls go up to a height of over 18 ft. Your response helped clarify both questions. Plus, I should comment I went about looking for design examples and found a chute wall design with slope 2:1 H:V, with strictly vertical main reinforcement but they place inclined longitudinals. It´s in the USBR´s small cannal structures. My walls are 1.5:1 V:H.

A sketch is required.