The use of hollow-core slabs

Enough popular material in the construction of high-rise is a hollow-core slab, which has some design features, and has certain technical characteristics that allow you to use it for various purposes.

Their size, strength and fire resistance, additional reinforcement as well as reinforcement and other technical characteristics determines the appropriate GOST.

The main purpose of this type of plates - an organization overlap at the junction of floors.

It is known that the operation and construction of any building is on the floor slab has to a great number of different loads, and therefore must be made of the gain that will increase the strength and reliability characteristics.

It should be noted also that the operation of any structure is complemented by the weight of a plate weight erected on her side of the building.

hollow-core slabs and have different sizes, which allows them to use when building a variety of homes.

All these characteristics determine the appropriate GOST, according to which, and made their release.

main features slabs

to overlap in the house must meet certain requirements, which includesrelevant GOST.

They must have a certain strength, appropriate size, the target weight, and in addition to have a high fire resistance.

must necessarily be made gain of overlap and the most appropriate and effective way to implement it - is to hold its reinforcement.

in high-rise construction in most cases overlap honey reinforced concrete slab floors using different types and species, the corresponding receiving guests.

They may be ribbed, in which case the gap between two adjacent ribs is about one hundred fifty centimeters.

as overlapping can act and ordinary reinforced concrete beams, carefully fitted together.

In any case, the overlap being built should have the necessary strength and fire resistance, as required by the Standard.When

huge variety of building materials which may be used as the overlap between the floors, it is most commonly used concrete slabs.

At present they are available in three different types.The most powerful and full-bodied, respectively, are strong and monolithic reinforced concrete slab.

They have high tensile strength and fire resistance, in their design provides additional reinforcement and reinforcement necessarily satisfied.

significant disadvantage of this type of plates is relatively high weight.

addition, you can meet and hollow concrete slabs that have some design features.

most popular, which are often used in the construction of a variety of objects that are hollow-core slabs, weighing on the order of magnitude lower than that of full-bodied.

They also carried out the reinforcement, which provides enough to build houses tensile strength and fire resistance.

According to GOST they have different sizes, which increases their versatility.

types and designations hollow-core slabs

Structurally core slabs are rectangular structure, which has the appropriate size and emptiness, located in the side of her.

These cavities significantly reduce the overall weight of the plate, though the tensile strength and fire resistance completely corresponds to GOST for high-rise construction.

They specifically performed reinforcement that allows to make the necessary strengthening of the whole structure.

Moreover, additional voids data added to enhance its bending strength and can be used as a process different communication holes.

Standard size hollow-core length averages of twelve meters and a width of one to two meters and a height of twenty-two to thirty-one centimeters.

Their division into types according to GOST is dependent on the number of voids and bearing options.

may be marked with a PC, PBC, PAC and PG and PB with digital coefficients from 1 to 7.

adopted GOST standards set arbitrarily marked by hollow-core slabs as three alphanumeric combinations.

Thus, in the present designation of the dimensions and type of concrete, the ultimate design load, the class used fittings, as well as some additional measures, such as fire resistance.

Since amplification is carried out by using different types of reinforcement, then understand what type to use in a particular item can be relevant symbols such as letter A is reinforcing rods, letter K in these plates - reinforcing ropes and so on.According to GOST

all the necessary markings on core slabs shall be applied in its lateral parts, and contain all the necessary information data.

In addition, together with the marking must indicate the weight of the structure, the date and the company name of the manufacturer.

necessary calculations

Due to the fact that the hollow-core slabs have a high tensile strength and fire resistance with a relatively small weight in view of the fact that the gain is made in the form of a certain type of reinforcement, they are most often used in high-rise construction.

Meanwhile, in order to properly determine the size and type of a plate, it is necessary at the stage of designing the house erected to hold the appropriate calculations.

Video:

Calculation of hollow-core slab is carried out to determine the limit of its strength at all intended loads.

Besides holding the calculation allows you to choose the most appropriate type of plate that can provide the required fire resistance parameters, as well as possible additional reinforcement of the entire construction.

In the calculations of hollow-core slabs are taken into account many factors that may have a particular impact on its strength and fire resistance.

As a result of calculation is determined not only the expected load on the square meter of hollow-core slabs, and fire resistance characteristics that are also of great importance in the subsequent operation of the building erected.

As a rule, the calculation of overlapping hollow structures are performed by qualified professionals who have the appropriate security clearance.

selected hollow design Based on these data, which will be capable of supporting all loads that will experience overlapping home.

addition, some calculations allow to calculate the amount of material required and, as well as its size.

also simultaneously solved the type of fastening, additional structural reinforcement if necessary, and some other details.

approach to this issue should be with full responsibility, taking into account all the developed standards and norms.

Storage and transport

Like any other building material, hollow-core design intended for floors in high-rise buildings should be properly stored and transported to their destination.

should be noted that developed the appropriate Standard, which defines the rules for storage and transportation of hollow structures.

transport them only when the mortar is completely stand up and get stronger, and therefore will fully comply with regulatory requirements.

there are special machines, as well as railway platforms for their transportation.

At the time of transportation of hollow structures between each product must necessarily be provided with the magnitude of the gap is not less than fifty millimeters.

corresponding pads should be placed in the vicinity of the location of special mounting loops.

Storage hollow structures for arrangement of intermediate floors, carried out on an ad hoc flat ground.

This allowed storing articles one to another, but only through special pads that must be placed around the perimeter of the structure.

Recommended thickness of each of these pads must be at least three centimeters.

In the case where the mounting tabs have a thickness of more than three centimeters, increased thickness, respectively, and the gasket itself.

stacked on storage-core design is necessary so that there is free access to the label and the capture tap each individual plate.

Also, it is better to hide the protective material to protect against aggressive the external environment.

Loading, unloading and stacking of hollow-core floor slabs should be done with the help of a crane.

As practice shows, now it is hollow-core slabs are the material, which allows to equip a reliable and strong overlap between floors in the house.