Trim Hatch in V8i SS4

Your query is unclear, post an image of what your are trying to achieve

If it was me, I would delete the existing pattern and do the following:

1. Select the edges bounding the concrete and the square shape that you don't want patterned.
2. Isolate the selection using Displayset
3. Repattern the area using the following settings (obviously set Pattern/Scale/Angle as required)