This regulation sets policy for the Engineering for Transportability Program, requirements for transportability assessment, and approvals for transportability problem items. TPIs are materiel in its shipping configuration which, because of its size, weight, fragile, or hazardous characteristics or lack of adequate means for lifting and tiedown, will be denied movement, will require special permits or waivers and special equipment or handling, or will be unacceptably delayed when moving within existing or newly designed transportation systems.