820 ILCS 130/3
Not less than the general prevailing rate of hourly wages for work of a similar character on public works in the locality in which the work is performed, and not less than the general prevailing rate of hourly wages for legal holiday and overtime work, shall be paid to all laborers, workers and mechanics employed by or on behalf of any public body engaged in the construction or demolition of public works. This includes any maintenance, repair, assembly, or disassembly work performed on equipment whether owned, leased, or rented. Only such laborers, workers and mechanics as are directly employed by contractors or subcontractors in actual construction work on the site of the building or construction job, and laborers, workers and mechanics engaged in the transportation of materials and equipment to or from the site, but not including the transportation by the sellers and suppliers or the manufacture or processing of materials or equipment, in the execution of any contract or contracts for public works with any public body shall be deemed to be employed upon public works. The wage for a tradesman performing maintenance is equivalent to that of a tradesman engaged in construction or demolition .
820 ILCS 130/3