Installation service of steel columns and steel girders

Paint and panels

All buildings that have statically load-bearing steel girders or columns require special precautions in the area of structural fire protection. Since these components lose some of their strength from a temperature of approx. 500 ° C, they must be upgraded in terms of fire protection. The protection goal is pursued here, to give fleeing people time to leave the building and to enable rescue measures. In addition to fire protection coating using fire protection paints, cladding using gypsum plaster fire protection boards (GKF) or calcium silicate boards is particularly widespread.

Quality and strength

When it comes to cladding steel columns and girders, quality and efficiency are the most important factors. Brandschutz Service Berlin sets new standards in the processing of sheet material. Our experts not only calculate the required cladding thickness for you. They will also make you a free and non-binding offer. Trust the many years of experience of Brandschutz Service Berlin and get advice over the phone today.

Calculation of the Ap / V value (formerly U / A value) for steel girders and steel columns

Structural steel elements are often used in the modern construction of many buildings. In the event of a fire, there is a risk that the steel elements will no longer be able to withstand the resulting heat from a certain point and will give way. As a result, the load-bearing elements and ceilings collapse. Depending on the circumstances, three or four-sided cladding of the steel girder is necessary in order to increase the fire resistance.

According to DIN 4102, the Ap / V ratio or earlier U / A ratio determines the required cladding thickness for free-standing steel girders and columns. The calculation is based on the profile dimensions of the steel profile. Profile dimensions and steel cross-sections for the calculation can be found in the common tables for steel construction.

Ap corresponds to the circumference of the steel profile, V to the cross-sectional area. As a guideline, one can say that solid profiles have a lower Ap / V value than slim profiles with the same circumference. This is because slimmer steel profiles reach the point more quickly where they can no longer withstand the heat. You therefore need thicker cladding in order to achieve the required fire resistance period.

Once the Ap / V value has been determined, you can request the appropriate panel thickness for the required fire resistance class and use it for the cladding. We are happy to support you in calculating the Ap / V value and in installing the fire protection elements.

Further information can be found on the information sheet on Ap/V-value-calculation of steel structures.