Hello,

With the recently answered Q&A 975, the community has a few questions on how much polycarbonate teams are allowed to use.

The intent of the rule is that all of the parts which are cut would theoretically nest into a single 12"x24" sheet. Teams are not required to literally use a single 12"x24" sheet of plastic.

Yes, this is functionally the same as saying that the total surface area of all parts must not exceed 288 square inches.

R7-f from Nothing but Net Q&A 1 (this is R10 in the Tipping Point manual)

Q. Example for Question 2: Let’s say I start with a 12" x 24" sheet of allowable plastic, and cut two 12" x 11" rectangular pieces for use on a robot. This leaves me with a 12" x 2" piece of plastic left, this piece having an area of 24 square inches. I then get out a new 12" x 24" sheet of plastic (identical to the previous sheet) and cut from it a circle with a 4" diameter (having an area of ~12.56 square inches) for use on the same robot. This circle could not have been cut from the remaining piece of sheet 1, but is lesser in area than that piece, and the total area of all pieces used on the robot (the two 12" x 11" rectangles plus the 4" diameter circle) is less than the area of a single 12" x 24" sheet. Would this be legal under <R7f>?

A. No, this would not be legal. These three pieces could not be reassembled into a single 12" x 24" sheet.

R7-f from Nothing But Net Q&A 2 (this is R10 in the Tipping Point manual)

When using plastics, all pieces used must be able to be assembled into a sheet no longer than 12"x24". This is different than a maximum total area.

Attached are two images, both rectangles are 12"x24". The highlighted portions of both sheets are equal in surface area, but the left couldn't be reassembled into a 12"x24" sheet.

- Is the plastic limit based on reassembling parts into a 12”x24” sheet, or is it based on total surface area?

a) If it’s based on surface area, how are holes within parts accounted for? Are holes/pocketing subtracted from the total surface area of the part?

b) How should competitors prove the surface area of complex parts to inspectors and referees?

Thank you for your time!