Overlap plates hollow technical data and weight

If you ever faced with the construction of a summer cottage, your own house or an apartment repair, you should be aware of what are hollow-core slabs, the technical characteristics of which will be presented in the article. If you know the design features, as well as the characteristics of the product, using the information provided by the marking, you can determine which limit of the decorative payload is capable of undergoing the slab.

Main varieties and positive features

The slabs are hollow, the technical characteristics of which allow you to build or repair, excluding mistakes, differ from full-bodied products with less impressive weight and affordable cost. But their reliability and strength is not lower. The number and arrangement of voids are not capable of reducing the carrier characteristics. On the contrary, thanks to this addition, the heat and sound insulation features of the building are enhanced. Among the positive characteristics, one can single out the popularity of reinforced concrete multi-storey buildings, monolith buildings and private houses. It is not uncommon for the described plates to become part of the bearing frame of a building.

Dimensions and weight

Overlapping plates are hollow, the technical characteristics of which you should be interesting before purchasing these products, can have different costs depending on the size and type. Dimensions range from 1.18 to 9.7 meters, as far as length. Whereas the width varies from 0.99 to 3.5 meters. The most common products are the length of which is equivalent to 6 meters, the width of the most purchased plates varies in the range from 1.2 to 1.5 cm. The unchanged value is the height of the plate, which is 22 cm. The hollow plates are hollow, the technical characteristics of which are presented below, possess Very significant weight. That is why for their installation there is a need to use a crane. Rent should be one that has a capacity of not more than 5 tons.

If we are talking about a plate whose dimensions are 1680х990х220, then its weight is 0.49 tons.

Specifications

For the purchase of products it will not be enough to know only the weight of the hollow core slabs. It is important to familiarize yourself with the main technical characteristics. As raw material in the production of concrete, which is performed with the use of cement grade M300 and M400. The figures will determine the quality features of the material, which eventually will be inherent in the finished product. Thus, cement M400 is able to undergo a one-stage load equal to 400 kilograms per one centimeter cubic per second. With regard to cement grade M300, it is a derivative of the M 400. Despite the fact that this material is able to withstand a less impressive load, it is characterized by ductility, which ensures the exclusion of a break in the deflections. If you decide to purchase hollow core slabs, the load specifications given above should interest you. Among other things, reinforcement is used to strengthen the products, which provides an impressive load-carrying capacity of the monolith. In the manufacturing process, stainless steel A3 and A4 are used. It is distinguished by increased resistance to corrosion processes and temperature changes. Thus, the products can be operated from -40 to +50 degrees.

Pledge of resistance to bending

Despite the fact that the weight of the slabs of the cavity is quite impressive, during operation they do not bend. This effect was achieved by the method of pre-tensioning the reinforcement, which is able to distribute the tension of the elements over the entire area. After the concrete hardens and becomes strong, the tensioned elements are cut off. At the ends, with which the plate rests on the bearing walls, double reinforcement is laid. This eliminates the deformation under pressure of weight and provides an opportunity to undergo loading from the bearing upper walls.

Characteristics of plates depending on the marking

Hollow core slabs , the characteristics of which must be known before purchase, are labeled. The product is indicated by two letters - PC. Next is a number that indicates the length of the product in decimeters. The following figures are the approximate width. The last figure indicates how much weight in kilograms can affect 1 square decimeter of the plate, taking into account its own weight. Thus, if you have a plate marked with PC 12-10-8, this indicates that the length is 1.18 meters, which is about 12 cm. The width is equivalent to 0.99 meters. As for the most impressive load that the product will be able to endure, it is equal to 8 kilograms per square decimeter. The last value is 800 kg per square meter.

Additional information on possible loads

It is worth noting that reinforced concrete hollow core slabs are able to undergo the aforementioned load, this index is the same for almost all hollow reinforced concrete products used as slabs. In the role of an exception, we can distinguish products that undergo weight up to 1000 and 1250 kilograms per square meter. Such plates can be recognized by marking, which ends with the figures 10 and 12.5 respectively.

Effect of characteristics on installation features

As the main rule of a reliable device of plates is compliance with the rules governing the support of the walls. If the area of support is insufficient, the walls may become deformed. While an excessive area will lead to an increase in thermal conductivity. The support of hollow core slabs for a brick building should be 9 cm. If it is a foam concrete and aerated concrete, then this figure increases to 15 cm. For steel structures, the figure should be equal to 7, 5 cm. At the same time, the deepest deepening of the articles in the walls should not Be more than 16 cm for brick structures and light blocks. For concrete structures and reinforced concrete analogues, this figure is equivalent to 12 cm. Before installing the plates, the edges of the voids should be closed with a light concrete compound, having a depth of 12 cm.

Additional recommendations for installation

Hollow core slabs, dimensions, GOST of which are specified in the article, should not be laid without mortar. The working layer is covered with a layer of the mixture, the thickness of which should be equal to 2 millimeters, but not less. This will ensure the possibility of uniform transfer of load to the structure of the walls. Among other things, when installing slabs on fragile walls, for example, made of gas blocks or foam concrete, the technology of reinforcing the mixture should be used, which will exclude the possibility of buckling the blocks. In order to reduce the quality of the thermal conductivity of the floor, it is necessary to insulate the structure from the outside.

GOST 9561-91

According to state standards, hollow core slabs are installed on load-bearing structures of buildings and structures for various purposes. In the production process, concrete is used, with the help of which products with a thickness of 220 millimeters are formed. Inside there are round voids, which have a diameter of 159 millimeters. From the central parts of two adjacent void spaces, the step is 185 millimeters. Hollow core slabs, sizes, GOST of which are indicated above, have frost resistance, which is determined by the brand F200. Plates are required to be purchased, the manufacture of which was conducted in accordance with the rules of state standards.