Scaffolding is a temporary structure used by construction workers to work at heights. It consists of wooden planks and metal poles. There are different types of scaffolding used depending on the building material and height. The main parts include standards, ledgers, braces, putlogs, transoms, boarding, and guard rails. Single scaffolding uses one row of standards while double scaffolding uses two rows. Cantilever scaffolding extends out from buildings. Suspended scaffolding hangs a working platform from ropes.