... Shower Unit/Flat Pack Container House 1) FLOORSteel frame made from cold rolled, welded steel profiles, steel quality:Q235A, 4mm thickness ... casts, welded to the steel frame, steel quality: Q235A, 4mm thickness 12pcs steel cross member, steel quality: Q235A, 3mm thicknessInsulation ... 3mm thickness 4pcs corner casts, welded to the steel frame, steel quality: Q235A, 4mm thickness 9pcs plywood cross ...