Hard labor jobs focus on manual or physical work, often in construction or farming. Most hard labor jobs focus on a single vocational trade or industry, though professionals who perform this type of work may use techniques from several areas. For example, construction workers are just as likely to operate heavy machinery as they are to carry heavy items around a work site manually. Hard labor jobs frequently involve lifting more than 50 pounds regularly, using hand and power tools, and interpreting blueprints or design documents. These jobs are often advertised as manual labor. The qualifications for a hard labor job vary by industry and position.