a re-enforced concrete roof on a crumbling building being supported by telescopic acrow props in preparation for restoration.

acme acro acrow adjustable albuferia balcony beds being block blue building cabling collapse concrete condition construction cracks crumbling danger dangerous degraded disrepair drains fabrication flat for low mechenical old overgrown pillars plasterwork portugal power preparation props reenforced repair restoration roof safety sky sloping strength structure structured support supported supports tech telescopic thread tiled work workers yellow