FI64969B - FOERFARANDE FOER FRAMSTAELLNING AV EN SAMMANSATT KONSTRUKTION - Google Patents

Description

64969

METHOD OF CONSTRUCTION OF THE COMPOUND STRUCTURE

FRAMEWORK FOR FRAMING PROCESSING IN A SAMMANSATT CONSTRUCTION

The present invention relates to a method of manufacturing a composite structure according to claim 1 for load-bearing horizontal structures of buildings, such as lower, intermediate and upper floors.

The use of composite slabs is known per se, because by combining different materials, most commonly steel and concrete, an advantageous use of material properties is achieved.

f,

It is also known to manufacture a composite slab by connecting the corrugated steel plate to the cast-in-place concrete with dowels machined into the slab at the bottom of every other corrugation (e.g. a Homecon composite slab).

The use of the material of the slab prepared in the above-mentioned manner is not optimized, but the concrete inside the corrugations is almost stress-free, thus unnecessarily increasing the own weight of the structure and causing unnecessary cost. The structure is therefore best suited for site-cast tiles, as it is simple to manufacture, with the corrugated sheet also acting as a mold.

A method of manufacturing a wall tile is also known, German Application Publication No. 2,415,647, in which the element is manufactured by first pouring concrete into a mold and pressing a corrugated steel plate provided with reinforcing bars close to the surface. These reinforcing bars are attached to the steel plate with fasteners by hand, and thus the manufacture is complicated and expensive. However, such a slab is not intended to withstand the loads present in the midsoles because the concrete layer is relatively thin.

The present invention is characterized in that tongues (2) with a length corresponding to the thickness of the concrete layer (3) are stamped on the steel plate (1) corrugated as gripping members, and that the steel plate is pressed into the concrete so that the 64969 3e is at the correct height relative to the mold base

Compared to the prior art, this method enables lower material consumption and thus lower manufacturing, transport and installation costs. When the thickness of the concrete slab can be kept small, a higher speed is also achieved in the factory mold cycle through shortened heating times. Another advantage is that the smooth floor surface is cast against the mold, so that no grinding is required. The mold can also be provided with edges that create the necessary edge shapes. An important advantage is that the required pre-raising in the upside-down manufacture can be achieved by a simple technique, e.g. with suitably sized weights.

In the following, the invention will be described in more detail with reference to the accompanying figures, in which Figure 1 shows a corrugated steel plate in which tongues are stamped; Figure 2 shows a side view of a slab according to the invention; the figure shows the preferred size of the tabs; Figure 3 shows the pressing of a steel plate into concrete; Figure 4 shows a slab made by the method according to the invention.

The tile is made as follows:

Tongues 2 are stamped on the corrugated steel plate 1 (Fig. 1). Their length is preferably equal to the thickness of the concrete slab, because in this way the corrugated slab is set at the correct height when pressed over the concrete slab.

li 3 64969

A conventional mass 3 (Fig. 2) is poured into a conventional smooth mold made of plywood or similar suitable material, which is provided with a transverse reinforcement or net if necessary. This mold may have ready-made edges to create the desired edge shapes 4, may be curved to provide pre-raising, and may include apparatus 5 for pressing the plate to the bottom of the mold and bending the corrugated plate to the pre-raised arc (Figure 3). The mold may also include equipment for casting concrete beams to reinforce the shear capacity of the slab at the ends of the corrugated sheet.

Any known method can be used to accelerate the setting of the concrete, preferably also infrared heating, since the mass to be heated is quite small.

‘Once the concrete has set, the mold is dismantled in the usual way, the slab is turned in the right direction and moved to storage (Fig. 4).