When choosing the type of overlap is necessary to take into account factors such as strength, lightness, ease of installation, sound and heat insulation. Overlapping Porotherm possess all these qualities and have a number of advantages over the other when used in low-rise construction and reconstruction.
Universal, ideal in all respects, suitable for any construction slabs, of course, does not happen. All of them are designed for certain classes of buildings and structures. Therefore, in the construction industry and other buildings where technical variables load exceeds 5,0 kH / m2 (500 kg / m2) Porotherm floors are not recommended.
The highlight of the fact that it is often ribbed floor consists of light concrete beam, hollow block and in-situ concrete , poured at the construction site. Because of hollow blocks, which fills the overlap Porotherm, and the special design of the beams, it is easier than monolithic overlap or overlap manufactured with plates BDP.
Overlapping Porotherm designed for mounting manually without using complicated construction mechanisms, since beams weight of 12 kg / m and the hollow blocks 16 kg.
chastorebristogo beams overlap Porotherm made of the reinforcing cage, the bottom of which is filled with concrete class B-20, section 40h120 mm. It is these beams, the design of which was developed about 20 years ago in Poland, is successfully used in Germany, Austria, Sweden, Lithuania and other countries, and are an innovation that distinguishes Porotherm slab of precast concrete slabs, which have been used in our country in the construction of "Stalin "houses. The difference is that while the blocks were placed on metal I-beams. But the weight of 6-meter beam Porotherm - 75 kg, and the I-beam of the same length, height 24 cm - 180 kg. As they say in the commercials - "Feel the difference»
The preparatory work for the production of monolithic ceilings: formwork installation, backwater, binding and fixing fittings - take a long time. formwork is not needed for installation Porotherm floors. It accelerates all construction work. When mounting overlap Porotherm to back only joists.
Weight 1 m2 overlap Porotherm (considering the top layer of concrete) about 260 kg. Traditional reinforced concrete floors with a leveling layer of concrete weighing about 380 kg. Thus, a difference of 120 kg. Overlapping area 200 m2 overlap Porotherm , a saving in weight of 24 tons!
overlap Benefits Porotherm :
• cheaper monolithic slabs with all the material and labor costs;
• the installation of overlap at the site is not used formwork;
• has good sound insulation and thermal insulation;
• mounted without using a crane;
• much easier than traditional slab
the undoubted advantage Porotherm floors in the reconstruction of buildings is that they can be mounted in buildings. existing roof.
Covering these may be applied in the construction of a 9-storey building, but because the construction site still appear cranes, the economic effect will not be so obvious.
