Complex sentence: If a 797 must be moved from one job site to another for any reason, it cannot be driven on public roads due to its exceptional size and weight; it must be disassembled, loaded onto tractor-trailer units, moved and then re-assembled.
Split into simpler sentences: If a 797 must be moved from one job site to another for any reason, it cannot be driven on public roads. Due to its exceptional size and weight, a 797 must be disassembled, loaded onto tractor-trailer units, moved and then re-assembled.