PL172780B1 - Precast reinforced concrete floor unit - Google Patents

Abstract

Prefabricated reinforced concrete ceiling element, the cross section of which is a broken plate o of varied thickness, creating a trapezoid without a base, but ended with feet with an anti-keystone notch, characterized in that the distance between the lines the intersection of the outer planes of the walls side with the upper planes of the feet is smaller, or equal to the distance between the intersection limits the planes of the inner side walls with the planes bottom feet.

Description

The subject of the invention is a load-bearing prefabricated reinforced concrete element for the construction of ceilings in all types of construction, with the dependence of not exceeding the external load of 4.0 kN / m ² with the axial spacing of the supports 6.0 m.

The previously known ceilings made of prefabricated reinforced concrete elements use large amounts of materials, which is expressed by their considerable weight exceeding 2.5 kN / m2 without external load. A particular difficulty is the storage and transport of these elements. The underside of the ceilings is most often finished with traditional plaster, because the time-consuming fixing of suspensions for modern ceiling finishes in them discourages such solutions.

The element according to the invention, with an unprecedented shape and basic technology based on the use of lightweight aggregate, has a specific feature that allows for an economical storage system, consisting in the fact that the upper element in the stack rests on the feet of the lower element, and all of them are in the built-in position. Elements per 100 m2 of the ceiling fit in one pile, less than 2.0 m high and 6.0 m long, and they can be transported at one time by a box car with a load capacity of 8.5 tons in three piles less than 0.8 m high. the ceiling without external load does not exceed 1.0 kN / m2. After rubbing the contacts of the elements' feet, the ceiling surface is prepared for painting without plastering. No other wet processes are required. The support strips of the suspended ceiling are fixed by screwing them with screws with feet in the joints of the elements, without the need to fill the wall plugs.

The subject of the invention is presented in an exemplary embodiment in an axonometric drawing. The element, 59 cm wide and 23 cm high, has a cross-section of a board of various thickness, broken in the form of a trapezoid without a base, but with 6.0 cm thick feet (1) in which there are anti-key grooves. The width of the upper surface of the foot 3.25 cm, the bottom plane 3.0 cm. The side walls (2) are at an angle of 120 ° from the surface of the feet and the shelf (3). The shelf is 4.0 cm thick, its outer surface is 33 cm wide and the inner one is 3 l cm wide. An element reinforced longitudinally and transversely with reinforcing steel, in the amount resulting from the spacing of the ceiling structural supports and its external load.

172 780

172 780

Publishing Department of the UP RP. Circulation of 90 copies. Price PLN 2.00

Claims (1)

Patent claim Prefabricated ceiling-reinforced concrete element, the cross-section of which is a broken slab of varying thickness, forming a trapezoid without a base, but ended with feet with an anti-key notch, characterized in that the distance between the lines of intersection of the outer planes of the side walls with the upper planes of the feet is less than or equal to distances between the lines of intersection of the planes of the inner side walls with the bottom planes of the feet.