6. The rear combination lamps are furnished of the best lamp materials commercially available. These lenses and lamp
bodies are molded of poly-carbonate plastic (Lexan, same as specified on the military design combination lamps). This
poly-carbonate plastic warps from heat at approximately 280 F and melts at approximately 470 F. Therefore, more heat
resistant materials are not commercially available, with the exception of glass. Glass lenses are totally unacceptable (and
obsolete) because of breakage.
7. The rear combination lamps are in compliance with the DOT Federal Motor Vehicle Safety Standards (49 CFR
571.108) and are imprinted with the SAE function compliance code letters SAE-IST. The rear combination lamps are
located within the DOT height limits of not less than 15 inches and not more than 72 inches. The splash guards and
installation also comply with the contract requirements.
8. Considering the amount of hot asphalt paving operations performed by user units in the field, it is not recommended
that all CCE dump trucks be modified to incorporate splash guard brackets, spill pan extensions, and guarding and
relocating the rear combination lamps. Instead, it is recommended that those user units be fully informed of the
modification information available and implement the modification as required. It is recognized that driver and operator
familiarization of both the dump truck and the paver will not solve the damage problems.