How to make a dumpling corner tenon

Three touch shoulder, also known as brown corner mortise and tenon, its practice is usually to be supported at the top of the column to open the length of two mortise and tenon, both sides of the tenon shoulder, by the inside for the right-angled shoulder, the need to support the panel to open up the corresponding mortise, by the outside of the mortise above the digging out of a piece of trapezoidal grid angle of the same notch, the two door post mortise and tenon on the mortise to a buckle to be connected. After such a connection, the furniture structure of the two looking at the surface of each shoulder, and legs and feet or column parts to stay a shoulder, three shoulders touching together so called three touch shoulder. Where there is a cover or bottom of the furniture parts can use this structure to connect. Touch shoulder is a more scientific approach, it's mortise and tenon in the middle, both sides have mortise and tenon shoulder, can assist mortise and tenon to withstand some of the pressure is not easy to twist, strengthen the vertical material support capacity, making the furniture strong and durable, but also break the structure of the horizontal and vertical lines of the atmosphere of the flat too dull, the icing on the cake to accentuate the smooth lines of the furniture beauty. But in the production must pay attention to, long and short tenon size length must be with the eye part of the size of the depth of the match, can never be arbitrary, or not even a tiny difference, fallacy, even if the vertical and horizontal two materials connected to the furniture is not solid.