... square meters Installation: It takes 10 workers 20-30 days to install a villa for 250 square meters. LIGHT STEEL STRUCTURE DRAWING:WE ... one package including:light gauge steel keel(all marked easy to erect), tile, gutter, wall panel, floor, window, door, sanitary, ... for light gauge steel villa---can do different design according to customer's requirements, different wall panel in different colors, ...