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Accounting for Wall Jump

Two options are available to account for the foundation wall jump in the analysis as shown in the figure (programs "Cantilever Wall" and "Masonry Wall").

Options to account for wall jump

If the jump is assumed as an inclined footing bottom, then a new shape of the footing bottom is considered and the structure front face resistance is included only up to a depth of the wall front face.

If the jump influence is considered as a front face resistance the analysis assumes a flat footing bottom (as if there was no jump), but the structure front face resistance included up to a depth of jump. In such a case computation of the structure front face resistance must also be input - otherwise the jump influence is neglected.

The jump introduced below the wall foundation is always considered as a structure front face resistance.

Assuming wall jump in the middle