The ornamental design for a frywallstructure, as shown and described.
FIG. 1 is a top front perspective view of the frywall structure of my present invention.
FIG. 2 is a rear bottom perspective view thereof.
FIG. 3 is a front elevation view thereof, the rear elevation view, the left side elevation view, and the right side elevation view being mirror images thereof.
FIG. 4 is a top plan view thereof.
FIG. 5 is a bottom plan view thereof.
FIG. 6 is a front elevation cross-sectional view along section 6-6 in FIG. 4.
FIG. 7 is an illustrative expanded cross-sectional view of portion 7 in FIG. 6; and,
FIG. 8 is an illustrative expanded cross-sectional view of portion 8 shown in FIG. 6.
Portions not illustrated herein form no part of the claimed design. The surface shading lines illustrate contour only and form no part of the present design. Interior portions shown in cross-hatching lining in the cross-sectional views form no part of the claimed design.