For ceilings spanning up to 6m for standard (SR1/2) panels or approx 3.8m for higher security panels, no further support is required – with walls supporting the weight of the ceilings.
However for wider clear spans ceilings must be supported off a new steel framework - or off existing steelwork or a slab above. New steelwork is designed and installed in house specifically for each project to meet the clear span required and load of the ceiling panels and any imposed service load. Note that ceiling panels are suitable for walk on access only. Any service or upper floor load is carried by the steelwork. Ceilings can sit on top or under the steels or can be supported into the steel webs and supported by the bottom flange.
Shorter spans reduce the horizontal steel section but may require internal columns. Horizontal steels can vary from 152mm x 152mm UB to Westok style beams (larger sections with holes to reduce weight) to major trusses for very large clear spans.
We also fabricate steelwork for mezzanine floors, transportable buildings, frameworks on legs to avoid flood danger or to place on foundation pads (see video of a build) rather than a full slab or complete external portal frames, etc. In addition we can fabricate any piece of steel required for the many items that can crop up in the course of a major build, security grilles to protect service entry holes, staircases, platforms and ramps.