CS208166B2 - Roof supporting structure from the space truss segments - Google Patents

Description

THE SLOVAK SOCIALISTIC DESCRIPTION VYNALEZU 208166 REPUBLIC (11) (B2) (19) TO PATENT (51) Int. Cl? E 04 B 7/04 (22) Registered 28 01 74 E 04 C 3/08 (21) (PV 543-74) (32) (31) (33) Priority from 24 04 73 (WP E 04 c / 170 402) a & from 09 08 73 (WP E 04 c / 172 789] Democratic Republic of Germany (40) Published 31 12 80 SUBSCRIPTIONS (45j Published 15 04 84 AND DISCOVERY

(72 J

Author of the invention SIEGEMDND HEINZ dipl.-ing., RUHLAND, STENKER HORST prof. dr., VYMAR, GROBA KARL dipl.-ing., GROSSZEISSIG and SCHMALZRIEDPETER dipl.-ing., LIPSKO (GDR) (73)

Proprietor of the patent VEB METALLEICHTBAUKOMBINAT, LIPIA (NDR) (54) Roof support structure of spatial trusses 1

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roof support structure of spatial lattice sections, predominantly rectangular in plan, in particular steel, for roofing areas predominantly for manufacturing and storage areas.

The known spatial trusses consist of individual pre-fabricated strips and joints, prefabricated individual pyramidal elements or other geometry spatial bases, partially / or fully prefabricated individual three-strip trusses or three-strip trusses. The geometrical elements are pre-assembled on the building site by means of couplings capable of transmitting forces to the individual space truss sections, and the surface covering is used as individual truss sections. In order to accommodate the roof cladding, the lattice girders serve to transfer the outer load as secondary support elements to the upper lattice joints of the spatial lattice. The bridges do not participate in the transfer of loads in known lattice trusses.

However, as purlins always increase the material and cost of the roof structure, the proposed roof structure with spatial truss has already been attempted to drain purlins. This roof structure is characterized in that a plurality of diagonal rods are provided on the pins located on the upper strips and on the lower strips which are not parallel to the first ones, forming a spatial horizontal structure on which the structural truss containing the upper beams is placed. , a belt, as a pre-assembled constriction by a nurse, sheath forming its own roof shells.

However, practice has shown that such roof tiles are even more expensive and costly than purlins, and therefore known roofs with spatial-prisms still have purlins. However, the developmental tendencies of spatial enclosure roof structures are directed towards reducing the prefabricated individual parts, regardless of whether the roof structure is made of purlins or with binders, since the manufacturing material consumption is reduced to the same extent. - costs and costs of pre-assembling individual parts. This tendency is in opposition to the increased forces in the joints and thus the predominant joining forces in the lower and upper beam members. The joining forces are currently being removed by selecting a plurality of longitudinally extending lower and hot rods which lie above the statically justified number of rods. A large number of rods require additional joints, since in advance the individual elements such as rods, knots and other geometry bases require expensive joints capable of transmitting forces in the joint areas. Furthermore, a roof structure consisting of lattice girders reversed by V is known. These lattice girders rest on supports and form a roof construction by joining with purlin and purl purlins. It is particularly disadvantageous here that the support arrangement is limited to the space-acting single beam, which must always lie on at least four supports. With the withdrawal of internal support in the sense of statics, a kinematic chain was created which would lead to the mobility of the entire structure and thus to its collapse. SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide spatial truss sections with a statically needed number of rods and arranged in a general constructive manner so as to be able to perform a supporting function and to be sufficiently rigid as well as to reduce the number of individual components for -track lattice structure when compared to the previously known lattice girders, while ensuring optimum take-over and transfer of all forces arising from the load to the roof. SUMMARY OF THE INVENTION It is an object of the present invention to achieve the above-mentioned object with a purely torsion-free lattice section, which requires a minimum of manufacturing and assembly costs, and which has sufficient rigidity, stiffness, so that both the waist and the rods are statically reduced the necessary number and the number of all individual parts is reduced.

This object is achieved by a solution according to the invention, which is based on a roof structure consisting of spatial portions, in particular of steel, with a predominantly rectangular plan, each of which according to the invention consists of two pairs of planar beams, of which each pair of common lower waistband and two separate waistbands which are located at a distance from each other, wherein all four mountainous paises are connected in transverse direction to one another by a rigid roof structure, rigidly folded and wherein at both faces of the spatial folding section a transverse joist which is firmly connected to the end of all four upper waistband and both lower waistband.

According to one embodiment of the invention, the secondary roof structure, rigidly folded, forms purlins rigidly connected to the upper struts of the trusses. This secondary roof structure can also be formed by a rigid roof plate, firmly attached to all four top passports.

This roof support structure, which is made up of spatial truss sections, with the same load-bearing effect as in the case of space-saving panels, saves a large part of the rods and thus the joints. It can be used arbitrarily with purlins as well as with a self-supporting roof structure without purlins. Here, the purlin-free arrangement has the advantage that the horizontal forces, for example from wind loads, acting asymmetrically to the center of the two sub-trusses, are optimal in a manner transmitted by spatial lattice sections, connected by a roof structure as a structural element to torsion. Also, in the arrangement of the self-supporting roof structure according to the invention, the disadvantageous susceptibility of the binding and the waistband to the lateral pitch is eliminated, whereby the spatial lattice sections and the roof structure of the structure therefrom become accessible for a wide range of applications.

BRIEF DESCRIPTION OF THE DRAWINGS The invention is explained in more detail in the following description, with reference to the accompanying drawings, in which: FIG. Fig. 2 is a plan view of a spatial intersection, Fig. 3 is a cross-sectional view of this section; Fig. 4 is a longitudinal cross-sectional view of this section; Fig. 6 is a cross-sectional view taken along line A-A of Fig. 5; Fig. 7 is a rear view of two lattice panels with interlocking members forming a spatial intersection section; FIG. 9 shows a perspective view of the upper waist joint. FIG. FIG. 11 shows the upper passive stripe according to FIG. 11 in side view.

The predominantly rectangular spatial truss sections include two double trusses 1, each consisting of two partial trusses 18, mounted together in a V-shape, as; 9. Each double port beam 1 thus has only one common lower passport 2 and two upper passages 3 which are rigidly connected to one another by a secondary roof structure, rigidly bent. This bending rigid secondary roof structure can be either purlins 6 rigid in bend, connecting all four upper paisels 3 of the adjoining section in their cleats 4, or directly bending rigid roof plate 17. This roof canopy 17 can be formed e.g. profiled sheet metal. The two parallel interconnecting beams 1, which are arranged in parallel, are connected to each other at their front ends by a transverse beam 7.

Claims (3)

The double trusses 1 and the transverse truss 7 can either be completely prefabricated. This means that the beams are either supplied to the building as finished building elements or are assembled only from the individual beams on the construction site. The double trusses 1 are generally made of prefabricated truss panels 8 of modular lengths, In the middle of the span, it is advantageous to insert a connecting rod 10 which, depending on its length, over the rigid modulation of the lengths of the truss panels 8, makes it possible to achieve any inclination of the formed roof structure. This embodiment is shown in the right half of Fig. 2 and in the corresponding side view shown in Fig. 4. In exceptional cases, the beams can be assembled entirely on the construction of individual upper waist bars 12 ', lower waist bars. bars 12 "and diagonal bars 12 *". The rods are connected to one another in a spatial truss structure by means of rod connectors 11. This alternative is shown in the left half of FIG. 2. Both embodiments can be combined preferably in cases where the span resides between two modular lengths assembled from prefabricated baffles 8. If the modular length of the truss panels 8 is, for example, 6.0 m, a span of 15 m can be assembled from two prefabricated truss panels 8, which are joined together by a rod connector 11 'rods 12', 12 ', 12'. The double trusses 1 can be preloaded by incorporating one or more biasing members 13, for example in a mold with a straight, polygonal or curved line. The prefabricated lattice panels 8 of the two trusses 1 consist of the dowel rods 14, the lower strip rods 15 and the diagonal rods 16 which are connected to each other in the joints 4. In the case of the embodiments shown on the right half of FIG. of the finished double-girder beams 1 are formed by a plurality of upper waistbands 14, a plurality of yokes 4, one yarn clutch 9, and two connecting yarns 10. Similarly, the lower waistband 2 of the same double truss 1 is formed by several. on the other hand, on the left half of FIG. 2, the upper pivot 3 is always of a plurality of upper waist rods 12 * which are interconnected by a rod connector 11, and a lower waistband 2 of a plurality of lower waist rods 12 "and a rod connector 11. Claims 1. A roof support structure of spatial truss sections, in particular of steel, with a rectangular plan, characterized in that each truss section consists of two double trusses (1) each formed by two surface trusses (18) having a common lower waist (2) and two separate upper waistband (3) which are spaced apart, all four upper waistband (3) being joined together in a transverse direction by a secondary roof structure, rigid in bending, and In the invention, a transverse lattice girder (7) is attached to both frontal lattice sections and is rigidly connected to the ends of all four upper belts (3) and both lower belts (2). 2. Roof support structure according to claim 1, characterized in that the secondary roof support structure, rigidly bent, is formed by the ties (6) firmly connected to the upper strips (3) of the partial trusses (18). 3. A roof support structure as claimed in claim 1, characterized in that the secondary roof structure, rigidly bent, is formed by a roof plate (17) firmly connected to all four-walled passages (3) of the partial trusses (18). 5 sheets of drawings Sevcrography, n. P., Race 7, Most