Scaffolding tubes are metal pipe sections that are used to build a scaffold, which is a support system that is erected outside of buildings and structures that are being built. Workers can safely access the upper levels of a building or structure by climbing these temporary structures and standing on platforms. Scaffolding tubes come in a variety of lengths, allowing the scaffolding structure to be tailored to a specific job. Couplers hold them together and can vary in size and function depending on the intended application.
Scaffolding tubes are classified into three types: standards, ledgers, and transoms. The vertical scaffolding tubes that will support the entire structure are known as standards. To provide lateral support, ledgers run horizontally, usually between the standards. Transoms are smaller support tubes that run perpendicular to ledgers and are used to add stability to the structure as well as a surface for platforms. When the structure is finished, couplers connect all of these different types of scaffolding tubes to prevent excess flex or movement. Because the tubes and couplers are modular, structures of various shapes, heights, lengths, and widths can be built.
Scaffolding tubes are typically made of steel or aluminum. Steel tubes are heavier, but they are also extremely strong. Although aluminum tubes are much lighter, they cannot support the same amount of weight as steel tubes. Composite tubes are occasionally used, but they are more expensive and are not used as frequently as steel tubes. Scaffolding tubes are relatively easy to cut to length, and they are typically sold at a specific length — usually around 20 feet (6.3 meters) — and then cut accordingly. The width is usually standard, and the thickness of the walls can determine how much weight the finished structure can support.
Steel tubes are usually galvanized. This means they are zinc-coated, which helps prevent rust and corrosion caused by exposure to the elements. Aluminum tubes are generally not required to be galvanized because aluminum is rust and corrosion resistant. If the steel is not galvanized, it is usually painted or chemically treated to prevent weather damage. Steel bends when impacted, but it can be easily bent back into shape; aluminum is more brittle and less likely to bend back into shape after an impact.
