A construction worker is a worker employed in manual labour of the physical construction of the built environment and its infrastructure. The term is a broad, generic one and most such workers are primarily described by the specific level and type of work they perform. For example, laborers carry out a wide range of practical tasks to help tradespersons on construction sites. They clean the construction site on a regular basis using tools such as rakes, shovels, and wheelbarrows to remove rubble, scraps of metal, and wood. They might also need to sweep out certain areas and put building supplies in order. Construction workers may colloquially be referred to as "hard hat workers" or "hard hats", as they often wear hard hats for safety.