A concrete staircase shell

Many works can also be done by an experienced home improvement. This includes numerous projects with concrete. An area that home improvement can only work on to a limited extent, however, is the concrete staircase construction. In particular, the shells of a concrete staircase brings home improvement quickly to its limits. In this article we describe to which concrete stairs you can "venture" and where the boundaries to the concrete staircase are.

No concrete house building without concrete

Concrete is an extremely popular composite construction material. Already throughout the 20th century he was increasingly used. Concrete is an indispensable part of modern house construction, as many components are made of this building material:

  • foundation
  • Basement baths (basement baths like the white basement bath)
  • Ceilings (prestressed concrete ceilings)
  • load-bearing walls and walls
  • Kniestock (support for the roof truss
  • Stairs indoors and outdoors

Various concrete stairs on and in the house

With the concrete staircases you have to subdivide these into four different areas:

  • Garden and outside basement stairs
  • Basement stairs lying inside
  • Concrete stairs that connect residential floors, so lying in the living area
  • Concrete stairs connecting apartments on different floors

Concrete stairs in the living area and between residential floors

Special concrete staircases represent those in the living area as well as those that connect two living floors. These concrete staircases are usually taut concrete stairs, ie stairs that rest at the starting point and in the end area and are self-supporting in between. Partly anchors are also mounted in the surrounding walls. Cellar stairs are also often among these concrete stairs. Rarely, they are like most concrete stairs backfilled in the outdoor area.

Highest demands on the staircase formwork

Exactly between these two design features are now the differences whether you can peel and build a concrete staircase yourself. You do not even have to have a coiled or semi-curved concrete staircase in the interior. Even a straight flight of stairs either from one to the other floor or to the pedestal of the concrete staircase and then from there opposite staircase continuity makes immense demands on the shells.

Before peeling is after concreting the stairs

Even before the shells of the concrete staircase, the properties of the later staircase are decisive: with which concrete should the staircase be poured and how intense should the reinforcement be? The quality of the concrete (for example C 20/25 or C 25/30) affects the density and thus the weight. Added to this is the weight of the steel reinforcement (steel pins and / or reinforced concrete mats). Immediately after incorporation, you must compact and post-treat the concrete.

Plan the statics of a formwork for concrete stairs appropriately

In other words, a concrete staircase cast with cast-in-place concrete is not only very difficult, but also the further processing (compaction and aftertreatment) plays a significant role in statics. Likewise, the properties of fresh concrete. All these aspects must be incorporated in the careful planning of the formwork.

However, we are now moving in an area where even civil engineering students regularly fail due to the mathematical solutions to be implemented. In short, you need a technically experienced architect or structural engineer to cover such a concrete staircase, who can precisely calculate not only the concrete staircase but also the formwork.

Implementation of the planned and calculated formwork

Then, however, this planning must also be implemented by an experienced and competent craftsman. This in turn means that even when mounting the staircase formwork, not just a few boards are cut to size and then nailed together, as some of the instructions that circulate above all on the Internet suggest.

You can peel and pour these concrete stairs yourself

But you can certainly bowl and pour certain stairs yourself. For example, there is the concrete staircase for the garden, which is backfilled. Also outside basement drains and some inside basement stairs can be designed (backfilled). Follow the link to get detailed instructions detailing the shelling and casting of such a concrete staircase.

Tips & Tricks

In the interior, however, in most cases a prefabricated concrete staircase, an element or block step concrete staircase is installed in new construction projects. The prefabricated staircase is simply lifted and fixed with a crane in the not yet closed house. Of course, this possibility is not applicable to a prefabricated house (false ceilings already retracted and roof truss available). In this case you will need structural engineers or architects as well as a skilled tradesman for the shelling and planning of a concrete staircase.

Video Board: How to Build and Pour Concrete Stairs