Top Coating Pro (1288)
With the application of Barrier 87-1151 it is possible to protect reinforced concrete structural elements such as beams, columns and brick elements.
Internally: can be applied as a finish.
Externally: can only be applied to surfaces that are not exposed directly to rain and are always protected by a protective water or solvent based enamel layer (0896 Top Lak, 1288 Top Coating Pro).
The protective enamel layer must be just what is reasonably needed, with no excess, as a large thickness could stop foam from expanding freely in case of fire.
To calculate how much intumescent paint to apply to structures, the following information is needed:
1 R-REI required fire resistance.
2 Drawings of the structures to be treated (giving measurements of the structures to be treated) or,
alternatively, a detailed list of the structures to be treated. For reinforced concrete structures it is important to have the thickness of the iron cover present; for brickwork, wall thickness and wall type (bricks, cement, stone blocks, etc.) and plaster thickness.
3 Any structural calculation reports (if available) issued by certified technicians (needed to issue any specific final calculation report for the work carried out).
4 References of the yard where the application has to be done or, alternatively, name of the applier or of the company carrying out the work.
The proper application of the product is fundamental for the performance result. The perfect adhesion to the substrate and homogeneity of the application’s thicknesses are the basic requirements for the expansion of the protective film Barrier in case of fire.
BARRIER can be applied to supports directly, as long as they are clean, dust and grease free. On powdery or fresh cement, the surface must be fixed and insulated using a coat of transparent CLIM-O PAINT PRO code 1004, or water-based fixative POLY ACRYL code 0004 or SUPERFIX code 0010.
In a first phase you can consider the effect of intumescent paint by assimilating it to a concrete equivalent thickness. Through the tests carried out, those equivalences have been assessed for beams and columns,floors and walls based on the fire resistance class and on the protective coat thickness.
Once you know the measurements of beams and iron cover, using tables you can calculate the missing iron cover thickness. That deficiency can be compensated by coating the element with a layer of intumescentpaint, based on the table values, reported in the technical reports of the product.
For fire certification purposes, you will need to carry out analyses using the analytical method to prove that results expected have been met, as the table method does not permit extrapolations or interpolations.