SKELETON UNIT AND SKELETON UNIT ASSEMBLY

摘要

A skeleton unit to mount mosaic plates, includes a main body section and an extension section. The main body section is integrally formed by strip pieces perpendicularly crossing each other to provide a grille shape. The extension section extends out from four edges of the main body section and is integrally formed with the main body section. The extension section includes prolongation pieces which respectively extend out from both ends of each strip piece, and parallel strips which connect with the outside ends of each prolongation piece on the same side and are in parallel with the edges of the main body section respectively. The parallel strip has lap joint hole portions, which penetrates the parallel strips and are used to overlap another skeleton unit. The sum of double the length of the prolongation piece and the width of the parallel strip is equal to the length of the grid.