PK floor slabs are round-hollow reinforced concrete load-bearing structures designed to cover any premises. The service life of a building structure depends on the quality of their production. Can be made from light, dense and heavy silicate concrete.
PC floor slabs vary in void diameter and thickness. They must necessarily comply with all the requirements of state standards for design (in terms of rigidity, strength, crack resistance). The main requirements put forward to PC floor slabs are not only reliability, but also high sound insulation. They are distinguished by enhanced properties against the formation of cracks and chips. They are produced both with the use of stressed reinforcement and conventional. This is their main difference from beam floor slabs PB, which are produced only with the help of prestressed reinforcement. In addition, the latter have more flexible physical characteristics, allowing installation with any pitch, and also allow you to make a slab of almost any shape. PC floor slabshave more stringent installation requirements, but are much denser and stronger in terms of kink/bend characteristics.
When lifting and mounting PC floor slabs, use special gripping devices or mounting loops. In the manufacture of this building material for hingeless mounting, the dimensions and location of the holes are provided in advance in the drawings of the project documentation.
In order for reinforced concrete building materials not to lose their distinctive properties, storage rules must be observed: the height when stacking stacks should not be more than two and a half meters, during long-term storage it is necessary to rest them on wooden blocks. Such linings are located near special mounting loops.
Hollow floor slabs are intended for the construction of the bearing part of structures and ceilings for various purposes. They are applied in strict accordance with the developed drawings and the necessary additional requirements.
Hollow structures, in accordance with state standards, are marked with markings. It consists of groups that include a letter and a number separated by a hyphen. The first part indicates the type of hollow core slab, its mandatory dimensions rounded to the nearest whole number, which are measured in decimetres. The second part indicates the serial number according to the required bearing capacity or the design load. In addition, they indicate the class of reinforced steel and the type of concrete (they do not indicate letters heavy, light - L, silicatedense - C). The third group includes additional parameters.
Ribbed floor slabs are produced for flooring in multi-storey buildings or industrial premises with a minimum step of six meters. Their height is four hundred millimeters (in accordance with the state standard 27215-87) or three hundred millimeters (in accordance with the state standard 21506-87).
Void floors, which are made with parallel voids (the length of the floors is determined from them), are designed to rest on two or three sides.
Alphanumeric groups in grades contain the following necessary designations: class of prestressed reinforcing steel, bearing capacity, type of concrete, slab size and the presence of holes of a thousand, seven hundred or four hundred millimeters (designated 3, 2, 1 respectively).
The material 12 is the most in demand in housing construction - PC floor slabs with a width of one thousand two hundred millimeters. Strict compliance with the requirements of standards and project documentation determines the further safety of the entire building as a whole.
