The ornamental design for spacer element for scaffolding, as shown and described.
FIG. 1 is a front perspective view of a spacer element for scaffolding
showing my new design;
FIG. 2 is a top plan view of the spacer element in its operative position,
the broken line showing of scaffolding parts is for illustrative purposes
only and forms no part of the claimed design;
FIG. 3 is a side elevational view thereof;
FIG. 4 is a top plan view of a second embodiment of a spacer element for
scaffolding showing my new design; and,
FIG. 5 is a top plan view of a third embodiment of a spacer element for
scaffolding showing my new design.