How to do the calculation method of woodworking stair practice?

1, mixed stairs and frame stairs are basically the same. Take the standard floor of frame stairs as an example: the height is 3m,

How to do the calculation method of woodworking stair practice?

1, mixed stairs and frame stairs are basically the same. Take the standard floor of frame stairs as an example: the height is 3m, the rest platform is 2,4m×1,the thickness is 2m× 10cm, and the front and rear beams are 20×40. Inclined plate 10cm, spacing 2m, skirting plate 65438+. Specific practice: generally, it is necessary to hang the column with a wire hammer first, then frame the beam bottom and nail the 10cm notch plate.

2. The right triangle formed by the height and width of stair treads and the right triangle formed by stair floor and its horizontal projection are similar triangles. The gradient ratio and coefficient of each step is the gradient ratio and coefficient of the stair floor and its horizontal projection.