Method for constructing animal staircase e.g. cat tree, involves forming staircase main structure by several tubes that are connected by clamping screws
The spiral staircase main structure is attached between the floor and the window or balcony, and is formed by several tubes that are connected by clamping screws. The height of the staircase main structure is adjusted by loosening the clamping screws. The staircase main structure is made of material such as plywood, wood, plastic, metal, and stone.