SIC for "demolition"
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1795 - Wrecking and Demolition Work
Special trade contractors primarily engaged in the wrecking and demolition of buildings and other structures, except marine. They may or may not sell material derived from demolishing operations. …Examples: Concrete breaking for streets and highways - contractors, Demolition of buildings or other structures, except marine - -
1629 - Heavy Construction, Not Elsewhere Classified
General and special trade contractors primarily engaged in the construction of heavy projects, not elsewhere classified. …Examples: Athletic field construction - general contractors, Blasting, except building demolition - contractors, Breakwater