Locus:7784:029 represents the plaster layer applied to the west face of wall Locus:7784:014 . The plaster layer exhibits a slight upward inclination.
The curve can probably be explained as the result of wooden beams, which, after having been placed in the wet clay, would have 'pressed' or 'pushed' the clay into its current curved-shape. Wood impressions can be observed on Zusatzbild no. 14054, 14055 etc.