How many level 3 laborers are used in this division of the company?

A laborer or labourer — see variation in English spelling — is a person who works in one of the construction trades, traditionally considered most reliable manual labor[clarification needed] Laborers are also employed outside of the construction industry, in fields such as road paving, building construction, bridges tunnels etc. laborers have all blasting, hand tools, power tools, air tools, and small heavy equipment, and act as assistants to other trades as well, when sometimes they need guidance,[1] e.g., operators or cement masons. The 1st century BC engineer Vitruvius writes in detail about laborer practices at that time. In his experience a good crew of laborers is just as valuable as any other aspect of construction. Other than the addition of pneumatics, laborer practices have changed little. With the advent of advanced technology and its introduction into the construction field, the laborers have been quick to include much of this technology as being laborers work.