Posted By Robert K Lewis Derrick I presume this is the British Steel decking which sits within an asymmetric section I beam, ie the bottom flange is wider than the top, Slimdeck I seem to recall is the brand name. The intention is to provide a much thinner floor slab than conventional systems and thus allow more storeys in a fixed height or a reduced height for the same number of storeys. If it isn't this do not read on!! The first sections of this system are a pain particularly as they have to be laid in a particular sequence and I have seen situations where complete packs needed to be re-stacked at high level so that the sequencing can be maintained. The method I have seen best used involves erecting the fixed handrails before erection commences. I also would want the decking to begin at low levels and work upwards through the building. The use of nets and harnesses seems to be about the only option. Cherry pickers have proved extremely difficult, if not impossible to use as access is needed above the sheet and the sheet has to be correctly located with a predetermined gap at each end. After the first sheet is in the problems begin to disappear. The HSE seemed satisfied with the work methods - the beam being around 500mm wide at the top flange. Bob