Roll Up Door Bottom Bar

FIG. 1 is a top front perspective view of the roll up door bottom bar showing our new design; FIG. 2 is a left side view thereof; FIG. 3 is a right side view thereof; FIG. 4 is a front view thereof; FIG. 5 is a rear view thereof; FIG. 6 is a top view thereof; FIG. 7 is a bottom view thereof; and, FIG. 8 is a top rear perspective view thereof. The broken lines represent portions of the roll up door bottom bar that form no part of the claimed design. The roll up door bottom bar includes a symbolic break along its length drawn in broken lines. The broken break lines and the area between the break lines forms no part of the claimed design.