A landing platform 10 comprising a pair of generally parallel co-extensive transversely spaced horizontal beams 12 between which there extends a floor panel 17. The floor panel 17 may be movable from an outer to an inner position relative to the building, and the beams 12 are held in position by means of vertically extending prop members 43 & 44 which extend between the beams 12 and an upper floor of the building. The prop members 43 & 44 are foldable from an upright position to a transport position located adjacent the beams 12. The landing platform 10 is also provided with side panels 18 which are movable between an operative upright position extending from the beams 12, to a transport position located adjacent the floor panel 17.