R409       *Fill Bumper corners. Corner joints between Bumpers must be filled with pool noodle material. Examples of implementation are shown in Figure 9‑8.

R101       *Frame Perimeter must be fixed. The Robot (excluding Bumpers) must have a Frame Perimeter, contained within the Bumper Zone and established while in the Robot’s Starting Configuration, that is comprised of fixed, non-articulated structural elements of the Robot. Minor protrusions no greater than ¼ in. (~6 mm) such as bolt heads, fastener ends, weld beads, and rivets are not considered part of the Frame Perimeter.

R410       *Bumpers must be supported. Bumpers must be supported by the structure/frame of the Robot (see Figure 9‑9). To be considered supported, a minimum of ½ in. (~13 mm) at each end of each Bumper wood segment must be backed by the Frame Perimeter (≤¼ in. gap, ~6mm). “Ends” exclude hard Bumper parts which extend past the Frame Perimeter permitted by R408-B. Additionally, any gap between the backing material and the frame:

R408       *Bumper construction. Bumpers must be constructed as follows (see Figure 9‑7):