Bumper zone height

[Al Skierkiewicz]

Samuel is correct. If there is a gap behind your bumper structure due to bolt heads, welds, warped plywood, etc. that do not exceed 1/4" then the gap is legal. If you have an irregularity in your frame for any reason, that exceeds 1/4", the width of said gap may not exceed 8 inches. Any gap greater than 1/4" is interpreted as "unsupported".

R33 Bumpers must be supported by the structure/frame of the Robot (i.e. the gap between the backing material and the frame must not be greater than ¼ in. and no section of Bumper greater than 8 in. may be unsupported). See
Figure 4-7.

Please note that this allows certain drive train designs to have gaps in the frame for wheels while still providing support for bumpers that meets the above rule.
This rule is identical to last year.