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What are the requirements for a steel beam when removing a load-bearing wall?

  • Posted by: Dorus

Removing a load-bearing wall is a complex job that requires careful planning and the appropriate structural provisions. A steel beam plays a crucial role in this process, replacing the wall's load-bearing function. The requirements for this beam are strictly regulated in building codes and static calculations.

Before you start with remove load-bearing wallIt is essential to understand the specific requirements that apply to the steel beam required to assume the load-bearing capacity. These requirements vary depending on the load, the span, and the type of structure.

What are the minimum dimensions for a steel beam when removing a load-bearing wall?

The minimum dimensions of a steel beam are determined by the span, the load, and the profile type. In residential construction, HE or IPE profiles are typically used, with a minimum height of 120 mm for spans up to 3 meters. For larger spans, taller profiles of 140 mm to 300 mm are necessary.

The exact dimensions depend on various factors. The span largely determines the required profile height, with a rule of thumb of the span divided by 20 to 25 for the minimum beam height in centimeters. For a span of 4 meters, this means that you need a profile of at least 16 to 20 centimeters high.

The load also plays a crucial role. In addition to the self-weight of the structure, variable loads must be taken into account, such as furniture, people, and any snow load on the roof. For residential houses, a variable load of 1,75 kN/m² is usually assumed for floors and 0,75 kN/m² for roofs.

Which calculations are needed before installing a steel beam?

Static calculations by a structural engineer are always required for the installation of a steel beam. These calculations determine the exact dimensions, the type of steel, and the fastening method. Without approved calculations, you will not receive an environmental permit and you run the risk of structural problems.

The static calculation comprises various components. First, the load analysis is performed, in which all forces acting on the beam are mapped out. This includes permanent loads, such as the weight of walls, floors, and the roof, and variable loads, such as occupancy and climatic loads.

Next, the deflection is calculated to ensure that the beam does not deflect too much under load. The maximum allowable deflection is usually 1/300 of the span for comfort and 1/250 to prevent damage to the finish.

The support of the beam must also be calculated. This determines how the beam is attached to the existing structure and what reinforcements, if any, are required in the load-bearing walls or columns on which the beam rests.

How is a steel beam correctly installed when removing a load-bearing wall?

A steel beam is installed by first placing temporary support, then carefully removing the load-bearing wall and installing the beam in the correct position with adequate support. The installation must always be performed under the supervision of a structural engineer and in accordance with the approved drawings.

The process begins with the placement of temporary props to support the overhead structure during the work. These props must have sufficient load-bearing capacity and are placed on a solid surface, often using adjustable steel props.

Next, the load-bearing wall is removed step by step, usually using diamond sawing and drilling techniques to minimize vibrations and shocks. It is crucial not to remove too much material at once and to continuously monitor the stability.

The beam is then hoisted into place and correctly positioned. The bearing must be at least 150 mm on both sides, unless the calculation indicates otherwise. The beam is fixed with anchors, bolts, or welding, depending on the design.

Which building regulations apply to steel beams in homes?

Steel beams in residential buildings must comply with Eurocode 3 (NEN-EN 1993) for steel structures and the Building Decree 2012. An environmental permit is always required for the removal of load-bearing walls and the installation of steel beams. The structure must be designed by a certified structural engineer.

The Building Decree sets specific requirements for structural safety. The beam must have a safety factor that meets the specified standards, taking into account both the ultimate limit state (failure) and the serviceability limit state (deflection and vibrations).

Specific requirements also apply to fire safety. In many cases, steel beams must be fitted with fire-resistant cladding to achieve the required fire resistance, usually 60 or 90 minutes, depending on the function of the building.

The beam must also meet corrosion protection requirements, especially in humid environments. This can be achieved by galvanizing, painting with corrosion-resistant paint, or using weather-resistant steel, depending on the application.

How The Concrete Driller Helps Remove a Load-Bearing Wall

We specialize in the professional removal of load-bearing walls and the installation of steel beams. Our experienced team ensures:

  • Complete project management from permit to completion
  • Collaboration with recognized structural engineers for static calculations
  • Use of high-quality diamond core drills and saws for vibration-free operation
  • Installation of temporary support and permanent steel structures
  • Neatly finishing and tidying up the workplace

Please contact us for a no-obligation quote. We will contact you within 24 hours and can often start your project within two days. Our professionals ensure that the removal of your load-bearing wall is carried out safely and in accordance with all applicable regulations.

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