In summary, floating stairs are attached to walls using a combination of embedded steel brackets, cantilevered treads, hidden or wall-mounted stringers, support rods or cables, and bolted connections. Each method requires precise engineering and professional installation to ensure safety and stability. Here are some of the common methods explained:
1. Embedded Steel Brackets
Steel brackets are often embedded into the wall to provide a secure anchor point for each step. These brackets are usually welded or bolted to the structural frame of the building, ensuring a strong connection. The steps are then attached to these brackets, giving the appearance that they are “floating.”
2. Cantilevered Treads
In a cantilevered design, each step is a single structural unit that extends from the wall without additional support. The treads are fixed into the wall with heavy-duty steel pins or rods that are anchored deep into the structural elements of the building, such as the concrete or steel framework. This method requires precise engineering to ensure that the treads can support the expected load.
3. Hidden Stringers
Some floating staircases use hidden stringers, which are structural supports that run along the length of the staircase but are concealed within the wall. The treads are attached to these hidden stringers, providing support while maintaining the floating illusion. The stringers are typically made of steel or another strong material and are securely anchored to the building’s structure.
4. Wall-Mounted Stringers
In some designs, a single or double stringer is mounted directly onto the wall. These stringers are usually made of steel or wood and provide the primary structural support for the steps. The treads are then attached to these stringers, which are securely fixed to the wall.
5. Support Rods or Cables
In certain modern designs, additional support rods or cables are used. These rods or cables can run vertically or diagonally from the steps to the ceiling or floor, providing extra stability while maintaining an open, airy feel. The rods or cables are typically made of stainless steel and are tensioned to add rigidity to the staircase.
6. Bolted Treads
Each tread can also be directly bolted into the wall. This method involves drilling holes into the wall and securing the treads with heavy-duty bolts. This approach is often used in combination with other methods, such as embedded steel brackets, to ensure maximum stability.
Engineering Considerations
For any of these attachment methods, careful engineering is required to ensure that the staircase can support the intended load. This includes considerations of material strength, load distribution, and the specific conditions of the building where the staircase is being installed.
Professional Installation
Due to the complexity and importance of proper attachment, floating staircases should always be designed and installed by experienced professionals, such as those at Jarrods. Structural engineers and skilled contractors can ensure that the staircase is both safe and aesthetically pleasing.
