scaffolding
US /ˈskæf.əl.dɪŋ/
UK /ˈskæf.əl.dɪŋ/

1.
a temporary structure on the outside of a building, made of wooden planks and metal poles, used by workers while building, repairing, or cleaning the building
:
•
The workers erected scaffolding around the old church for repairs.
•
Safety regulations require proper installation of scaffolding.