rewiring a 9 story office building in b/mouth, me and "tim" had the job of running a wide tray right through the false ceiling from one end to the other, it was suspended from the concrete using redheads and threaded 6mm rod,
tim couldn,t find a decent fixing as there were hollow voids in his line of fixings, so he decided to put bits of carboard around each redhead to pack them out
well their were 400 computer cables to be pulled through the traywork--
when 300 were layed in, tims fixings came out of the concrete and the tray collapsed all down one side and bent all the existing ceiling grid-- my how we laughed