Different forms of stairs will have different support methods. No matter what form of support is adopted, attention must be paid to the reliability of the support. When people walk on the stairs, the stairs will not sway. And the support should not affect the beauty of stairs and space. Generally, the lower stairs are supported by steel pipes and wooden mandrels.
1, steel pipe
A steel pipe has a hollow section, and its length is much larger than that of steel with diameter or circumference. According to the section shape, it is divided into circular, square, rectangular and special-shaped steel pipes; According to the material, it can be divided into carbon structural steel pipe, low alloy structural steel pipe, alloy steel pipe and composite steel pipe. Using steel pipes to make building structural grids, columns and mechanical supports can reduce weight.
2, ejector pin
Thimble refers to a temporary inner column that is driven into a thin-walled tube in some objects (such as a tubular steel column to be filled with concrete later), and wooden thimble is more common.