Abstract: A vertical intersecting lightweight steel frame includes several main frames and side frames, which are connected with each other vertically. A first oblique fold is formed on two sides of the main frame and a protrusion is on the bottom of the side frame. The angle of the first oblique fold on both sides of the indention of the main frame is less than 45 degrees. A second oblique fold above the first oblique fold has an angle of 45 degrees. The angle of the protrusion of the side frame is also 45 degrees. The whole structure is stronger and easier to assemble. A darkened area of the vertical connection between the main frame and side frame is kept hidden.

Abstract: A vertical intersecting lightweight steel frame composes of several main frames and side frames, which are connected with each other vertically. A first oblique fold is formed on two sides of the main frame and a protrusion is on the bottom of the side frame. The angle of the first oblique fold on both side of the indention of the main frame is less than 45 degree, a second oblique fold above the first oblique fold with angle of 45 degree. The angle of the protrusion of the side frame is also 45 degree. The whole structure is stronger and easier to assemble, the darken area of the vertically connected between the main frame and side frame is kept undisclosed.