PL214372B1 - Beam-and-slab floor - Google Patents

Description

(12) PATENT DESCRIPTION (19) PL (11) 214372 (13) B1 (21) Application number: 386647 ^{(51) Int.Cl.}

E04B 5/14 (2006.01) E04B 5/00 (2006.01) (22) Filing date: 01.12.2008 (54)

Slab-ribbed ceiling

(73) The right holder of the patent: (43) Application was announced: WROCŁAW UNIVERSITY OF TECHNOLOGY, Wrocław, PL June 7, 2010 BUP 12/10 (72) Inventor (s): ZBIGNIEW BOKUN, Wrocław, PL (45) The grant of the patent was announced: 31.07.2013 WUP 07/13 (74) Representative: item. stalemate. Regina Kozłowska

PL 214 372 B1

Description of the invention

The subject of the invention is a slab-rib ceiling, intended in particular for general and industrial construction.

Beam-less slab ceilings are used for a span of 3.5 m with one-way reinforcement, and for a span of 5 m with two-way reinforcement, called cross reinforcement. Single-span slabs are based on continuous supports (walls) are cost-effective up to a span of 3 m, while with larger spacing of supports, slab-rib ceilings are more advantageous.

In slab-rib ceilings, the load-bearing structural elements are ribs based on continuous supports on both sides, and in skeletal structures - on columns by means of binders, and the spaces between the ribs are filled with load-bearing plates supported on the ribs and transferring live loads and weight to the load-bearing columns.

The solution of a slab-ribbed ceiling, known from professional literature and construction practice, used in skeletal structures, consists in the use of binders, ribs and ceiling slabs, while the beams based on columns form a square area that has been divided into equal spaces with one or more ribs. rectangles, and in two adjacent fields, the ribs are perpendicular to each other, and the free spaces are filled with load-bearing plates.

The slab-rib ceiling according to the invention consists of five ribs shorter than the spacing of the columns, rigidly connected to each other to form a load-bearing structure, similar in shape to a wide-arm I-section, in which the ribs of the legs rest on the load-bearing columns with their first end, have second ends rigidly connected to the rib with a web at an obtuse angle, preferably 120 °, dividing the square field of the modular mesh into two isosceles, equal triangles and two equal trapezoids, and in two adjacent areas of the modular rib mesh, the webs are perpendicular to each other and form equal areas between the ribs filled with load-bearing plates.

Preferably, the support plates are divided along the axis of symmetry.

The advantage of the new slab-rib ceiling is the elimination of binders, which reduces the structural thickness of the ceiling, bringing the load-bearing system of the ribs to the necessary minimum and using only two elements with a rib and a plate of the same shape, facilitates the implementation of the object and contributes to lowering the construction costs.

The subject of the invention in an exemplary embodiment is shown in the drawing, which shows a plate-rib ceiling in a top view.

P r z k ł a d 1

The slab-ribbed ceiling has, on the posts 1, a square modular mesh, supported by the first end of ribs 2 shorter than the spacing of the posts 1, constituting the arms of the load-bearing system, resembling a wide-arm I-section. The other ends of the ribs 2 are rigidly connected in pairs to the rib 3 by the web at an obtuse angle, they divide the square area into two isosceles, equal triangles and two equal trapeziums. In two adjacent fields of the modular mesh, ribs 3, the webs are perpendicular to each other and form the same filling areas between the ribs 2, 3. The fields between the ribs 2, 3 are filled with load-bearing plates 4.

P r z k ł a d 2

The slab-ribbed ceiling is made as in the first example, with the difference that the second ends of the ribs 2 are rigidly connected in pairs with the rib 3 by the web with an obtuse angle equal to 120 °, and the load-bearing plates 4 are divided along the axis of symmetry.

Claims (3)

Patent claims 1. The slab-rib ceiling is equipped with plates and ribs, characterized by the fact that it consists of five ribs (2, 3) shorter than the spacing of the columns (1) and rigidly connected to each other to form a load-bearing structure, resembling a wide-arm I-section in which the ribs (2) are legs and rested with their first end on the load-bearing columns (1), they have second ends rigidly connected to the rib (3) with the web at an obtuse angle, dividing the square area of the modular mesh into two isosceles, the same triangles and two equal trapeziums, and in two adjacent fields of the modular mesh of the rib (3), the webs are perpendicular to each other and create equal areas between the ribs (2, 3) filled with load-bearing plates (4). 2. Ceiling according to claim A method as claimed in claim 1, characterized in that the support plates (4) are divided along an axis of symmetry. 3. Ceiling according to p. The method of claim 1, characterized in that the obtuse angle is 120 °.