1 1987 Standard Industrial Classification System code; see text, Section 17, Business.
2 Average for the pay periods including March, May, August, and November 12.

Source: U.S. Census Bureau, 1997 Economic Census,Core Business Statistics Series, Comparative Statistics, EC97X-CS2.

http://www.census.gov/epcd/ec97sic/E97SUS.HTM*Construction Industries

This division covers all employer establishments (establishments withpayroll) primarily engaged in contract construction or construction ontheir own account for sale as defined in the 1987 Standard IndustrialClassification (SIC) Manual. Constrction is defined by three broadtypes of activity:

1. Building construction by general contractors or by operative builders.General building contractors are primarily engaged in the constructionof dwellings, office buildings, stores, farm buildings, and otherbuilding projects. Operative builders who build on their own accountfor sale are also included here. However, investment builders who buildstructures on their own account for rent are classified in Real Estate.

2. Heavy construction general contractors. Heavy construction generalcontractors are primarily engaged in the construction of highways,bridges, pipelines, sewers and water lines, marine construction, power,and petro-chemical plants and other nonbuilding construction projects.Special trade contractors are classified in heavy construction, if theyare specifically engaged in the following activities: grading forhighway and airport runways; guardrail construction; installation ofhighway signs; asphalt and concrete construction of roads, highways,streets, and public sidewalks; trenching, cable laying; conduitconstruction; underwater rock removal; pipeline wrapping; or landclearing and leveling.

3. Construction by other special trade contractors. These contractorsinclude plumbers, painters, carpenters, electricians, brick layers,roofers, etc. For the most part, they perform their work at the siteof construction, although they may also have shops where they performwork incidental to the job site. General contractors in both thebuilding and the heavy construction field usually assume responsibilityfor an entire construction project, but may subcontract to others allof the actual construction work or those portions of the projectrequiring special skills or equipment. Special trade contractors maywork for general contractors, for other subcontractors, or may workdirectly for the owner of the property.