Technical drawing details curtain wall and ceiling and cladding stone the required thicknesses of the exterior wall with masonry slowed down the construction time and increased the expenses of the buildings more than two storey high owing to regulations. this problem was overcome with the introduction of steel or concrete frames. in these cases; the floors and the walls were supported by the beams of the frame at one point in time. this meant that walls could resist the wind forces and bear their own one storey height weight