Spiral stairs are often complicated because their designers rotate upward around a central axis, so each step requires precise measurement and construction. LEARN MORE ABOUT SPIRAL STAIRS
I. Preliminary design and planning
1.1 Structure safety
Load-bearing capacity: Select appropriate building materials (steel, concrete or solid wood) according to the needs of use (such as the flow of people and the weight of furniture) to ensure that the load of stairs meets national standards.
Center axis stability: The center column must be vertically installed and firmly fixed in the foundation to avoid uneven force caused by deviation.
Step parameters: Step height recommended 15-18cm, depth ≥24cm, ergonomic; The spiral radius should not be too small to prevent bumping or walking cramped.
1.2 Spatial arrangement
Measure the height and available space, ensure that the rotation Angle (usually 270°) matches the floor area, and reserve access paths.
Pay attention to the coordination of surrounding facilities such as doorways and handrails to avoid conflicts.
2. Construction points
1.1 Precise localization
The embedded parts and the central axis need to be strictly calibrated, and the error is controlled at the millimeter level, otherwise the subsequent adjustment is difficult.
Use a laser level for auxiliary installation to ensure symmetry.
1.2 Materials and techniques
Steel structure: the welding points need to be treated with rust prevention, and the bolt connection should be double reinforced;
Wooden stairs: paint with moisture-proof paint and fill the joints with glue;
Concrete: Formwork installation should be tight, layered vibration during pouring to prevent the drum.
1.3 Security detail
Anti-slip treatment: anti-slip strip (metal/rubber) is added to the edge of the step, and the surface is brushed with wire texture;
Armrest installation: height 90-110cm, the use of rounded corner design, welding smooth grinding;
Lighting system: Embedded inductive LED lamp strip or wall lamp to eliminate dead corners.
3. Acceptance test
Load-bearing test: gradually load to 1.5 times of the design load, observe the deformation;
Dynamic load test: simulate daily use vibration, check abnormal noise or loosening;
Horizontal and vertical check: Use a ruler to detect the flatness of each step, the deviation is less than 3mm.