In Thailand, construction waste is classified as part of municipal
solid waste (MSW). It is manually collected and dropped through a
temporarily erected refuse chute to the ground floor. It is then
cleared out of the work site by the main contractor or by a subcontractor.
A survey of 32 construction sites in Bangkok by Chanchorn
(2002) revealed that about 69% of construction companies usually
manage the disposal of these wastes themselves, while 31% contract
the disposal to subcontractors or other individuals. Also,
available information indicates that the majority of construction
waste is disposed of either in uncontrolled sites or in other inappropriate
sites (Ashford et al., 2000; Padungsirikul, 2003). Therefore,
it is important to formulate laws and policies to motivate
these companies to record and report the volume of construction
waste they generate as well as the method(s) of treatment and
disposal.