PL186364B1 - Bar steel reinforced floor or flat roof slab made of light-weight composite - Google Patents

Abstract

The ceiling and flat roof plate, preferably a channel plate, made of light composite is reinforced with timber and/or plastic rods, especially with timber slats. It has longitudinal channel openings in light composite. It is equipped with longitudinal rods, which support the plate, operating as a load-carrying element, integrated with a cement-chipboard. Characterized in that: In the zone near supports, it is equipped with an anchoring element in the form of a transversal bar (3, 3'') fixed to the longitudinal rods (2).

Description

The subject of the invention is a ceiling and roof slab made of lightweight composite reinforced with wooden and / or plastic bars, used in general construction for the construction of ceilings and flat roofs.

There is a known solution of ceiling and roof slabs made of light composites such as styrogypsum, expanded clay, chip-cement, which are reinforced with wooden slats, shrub stems located parallel along the slab.

The disadvantage of the known solutions is the slippage of the bars and slats in relation to the composite early in the load period. It is caused by low values of the tensile and compressive strength coefficient of the lightweight composite, as well as the unfavorable ratio of the cross-section of the batten to its contact surface with the composite. Wooden slats or bars in light composites are thick and short, as opposed to thin and very strong bars in reinforced concrete structures. Therefore, the cooperation of wooden bars with a light composite is limited to low loads.

The essence of the solution according to the invention consists in the fact that in the supporting zone it is anchored in the form of a transverse bar attached to longitudinal bars.

An advantage of the solution according to the invention is that the anchoring system can be selected so that the tensile stresses in the bars and compressive stresses in the composite can achieve the strength of these materials. This allows the boards to achieve their full bending capacity and can be used for most loads and spans.

The subject of the invention is presented in an exemplary embodiment in the drawing, which shows the ceiling and roof slab of lightweight composites in an axonometric view.

The slab is a hollow-core slab 4, made of light composite, in which there are elongated holes 5. This slab is reinforced with longitudinal wooden strips 2 and is bonded to the chip-cement slab 6, An anchor is added in the support zone of the slab, attached to the longitudinal strips 2 wooden transverse lath 3.

During bending, it acts on the system of internal forces, consisting of delaminating forces 7 acting on the transverse wooden lath 3, tensile forces 8, acting along the longitudinal strips, and compressive forces 9, occurring in the lightweight composite of the slab 1. This system of forces effectively prevents slippage of the longitudinal strips 2 during slab loading 1. When properly selected, the slab achieves its full bending capacity and can be used for greater loads and spans.

All elements of the reinforced slab: the light composite slab 4 and the batten and 3 constitute the structure, they are the load-bearing elements.

186 364

Publishing Department of the UP RP. Circulation of 50 copies. Price PLN 2.00.

Claims (1)

Patent claim Ceiling and roof slab made of light composite reinforced with wooden and / or plastic rods, especially wooden strips, preferably channeled, with longitudinal holes in a lightweight composite, provided with longitudinal bars, on which the slab, which is also a load-bearing element, is bonded to the chipboard - cement, characterized in that in the supporting zone it is anchored in the form of a transverse bar (3) attached to the longitudinal bars (2).