The ornamental design of a removable baserailsection for a replacementrooftopunit (RTU), as shown and described.
FIG. 1 is a front perspective view of a removable base rail section for a replacement rooftop unit (RTU).
FIG. 2 is another front perspective view of a removable base rail section;
FIG. 3 is a right side view of a removable base rail section;
FIG. 4 is a left side view of a removable base rail section;
FIG. 5 is a top plan view of a removable base rail section;
FIG. 6 is a bottom plan view of a removable base rail section;
FIG. 7 is a front view of a removable base rail section; and,
FIG. 8 is a rear view of a removable base rail section.
The broken lines in the drawings illustrates the replacement rooftop unit of the removable base rail section which forms no part of the claimed design.