Service risers are a type of roof penetration and provide a route for mechanical and electrical services to pass through a concrete roof. They are commonly used in conjunction with rooftop plant decks, and they contain ducts, pipes or cable trays.
A vertical riser is any component that extends vertically through a building, including for example stairs and lifts, but the term is most commonly used to refer to ductwork, pipes, conduits and cables.
Falls are the largest cause of accidental death in the construction industry and account for 50% of all fatalities according to the UK Health and Safety Executive.
Riser voids are the openings which are left to accommodate mechanical and electrical services on multiple floors of a building and can provide real safety challenges for contractors.