a system of scaffolds
"The new library project relies on an elaborate system of scaffolding that covers three entire city blocks."
A temporary modular system of tubes (or formerly wood) forming a framework used to support people and material in the construction or repair of buildings and other large structures.
"The crew carefully climbed the scaffolding to reach the upper windows for repairs without needing a crane."
present participle of scaffold
"The workers carefully removed the scaffolding as they finished installing the new windows on the building's second floor."