accident angles broken clearing damage damaged danger dangerous dangling electricity elevation equipment external height heights high insulators machinery on-high perspectives power power-lines power-pole repair-crew repairing repairs replace replacement replacing risks risky safety safety-harness service snapped surface surfaces trucks up-high vehicles work workman workmen alert appropriate-behavior appropriate-behaviour area attention banned boundaries boundary cigarettes communicating communication direction directive distinctive entrance environment health health-risk limits location no-smoking not-allowed not-permitted penalties penalty permission-denied pollution prohibited prohibition shopping-center shopping-centre sign symbol thick thin unhealthy warning wording words arm basket cherry-picker elevated Harness hydraulics lifting raised raised-platform raising appearance building capping cleaning cover covered covering dangers ear protection edge exterior high-pressure improvement maintenance pressure pressure-cleaning renovating renovation restoration restoring roof roof-area roofing rooftop skies sky spray sunlight sunshine tiles tiling tools tough water wet architectural architecture blue color colors colour colours features orange paint painter painting safety-colours wall walls white