EP0081496B1 - Industrialized metallic multi-storey building system with elements finished at the work-shop - Google Patents

Abstract

The system comprises plane elementary metal components, constructed and completely finished at the work shop and assembled on site by bolting from conventional concrete foundations (120, 150). There are provided, particularly, façade column modules (10), central or inner column modules (12), floor modules (20), roof frame modules (41, 401) and railing modules (50).

Description

The present invention relates to an industrialized metallic building system with floors comprising prefabricated metal components completed in the workshop and assembled in situ by bolting from traditional concrete foundations and essentially comprising modules of facade columns and interior columns, landing modules, stair modules, roof modules, facade panel modules, interior partition modules and elements for forming floors.

A system comprising such modules is described in patent application DE-A-2,404,108. By means of these modules, a steel frame is made up of frame elements formed by columns and beams which are completed by sheet metal plates carried by the frames. The profiles used for the framework of the frames are cold-bent sheet steel profiles.

Another metal frame system is described in patent application DE-A-2,206,848. We sought in this system a modulation whose horizontal frame is a square of 2 m x 2 m and the vertical frame of 0.50 m, the floor panels being juxtaposed in both directions. All the structural elements are brought directly to the site and are assembled there before assembly. It is a traditional construction method with the difference that all construction elements are cut and prepared to size to be assembled on site.

Document FR-A-2,381,871 discloses a metal frame system using semi-open tubular profiles. The assembly on site is carried out by small elements like the assembly of a traditional frame, the elements of completion being assembled on the site.

Document US-A-3,798,853 discloses a system using extruded aluminum profiles having a standardized section. We tried to keep a great freedom of architectural design allowing a traditional type of construction.

In the system according to the invention, as defined by claim 1, on the contrary, attempts have been made to produce large components completely finished in the workshop. The essential frame element is not a frame, but a sort of table on four legs constituted by the floor module fixed on four columns.

The object of the invention is to be able, from industrialized countries, to supply to overseas countries in the process of development, multi-storey buildings delivered in elements completely finished in the workshop, these elements being made up of longitudinal components. or plans easily transportable by air, land or sea, easy handling and easy to assemble on the erection site by bolting from traditional foundations to form after assembly and connection of fluid or electricity networks, a building immediately ready in use.

The design of the framing of the components and their assembly nodes is such that after assembly on site, the assembly becomes hyperstatic.

The columns are advantageously provided with consoles welded in the workshop. The floors are designed to be placed on these consoles during assembly. Each column supports two neighboring floors to obtain hyperstability.

• - longueur: 5.530 mm
• - largeur: 2.440 mm
• - épaisseur: 354 mm

The dimensions and modular weight of the modules are advantageously chosen so as to allow easy handling and transport from the prefabrication factory to the assembly site. The heaviest module is the floor module whose weight is, for example, 12-625.5 N for the following dimensions, not all in mm:

• - length: 5.530 mm
• - width: 2.440 mm
• - thickness: 354 mm

which allows the transport of five floors on an ordinary truck with seven tonnes of payload. We can therefore put this system in the "light prefabrication" category.

• - la figure 1 est une vue en coupe transversale de l'ensemble d'un bâtiment à deux travées;
• - la figure 1 bis est une vue en coupe transversale de l'ensemble d'un bâtiment à trois travées;
• - la figure 2 est une vue éclatée de l'ensemble du bâtiment en perspective;
• - la figure 3 est une vue éclatée d'un niveau en perspective;
• - les figures 4 et 5 sont à plus grande échelle des vues de détail du niveau représenté sur la figure 3;
• - la figure 6 est une vue en coupe du plancher et

The invention will now be described more particularly with reference to the accompanying drawings in which:

• - Figure 1 is a cross-sectional view of the whole of a building with two spans;
• - Figure 1a is a cross-sectional view of the whole of a building with three spans;
• - Figure 2 is an exploded view of the entire building in perspective;
• - Figure 3 is an exploded view of a perspective level;
• - Figures 4 and 5 are on a larger scale detailed views of the level shown in Figure 3;
• - Figure 6 is a sectional view of the floor and

• - la figure 7 est en coupe un détail du raccordement du plancher à la façade;
• _. - la figure 8 est une vue en coupe du raccordement de l'escalier aux paliers d'étages et aux paliers intermédiaires;
• - la figure 9 est une vue en coupe de la faîtière;
• - la figure 10 est une vue en coupe de l'ensemble toiture-cheneau;
• - les figures 11 et 12 sont des détails du raccordement des panneaux de façade au plancher.

FIGS. 6A and 6B are details thereof at the level of the junction of two contiguous modules;

• - Figure 7 is in section a detail of the connection of the floor to the facade;
• _. - Figure 8 is a sectional view of the connection of the staircase to the floor landings and the intermediate landings;
• - Figure 9 is a sectional view of the ridge;
• - Figure 10 is a sectional view of the roof-track assembly;
• - Figures 11 and 12 are details of the connection of the front panels to the floor.

In these different figures, the same reference notations designate the same elements.

FOUNDATIONS (FIG 1 and 1 BIS)

These are constituted on the periphery of the building by shooting footings 110 in reinforced concrete, founded at a minimum depth of - 80 cm, on which are built walls in reinforced reinforced concrete 120, of - 20 cm thick, serving foundations to the columns of facades 10 and gables.

These walled concrete walls also close the ventilated technical space 130 with a free height of 1.35 m, provided under the floor of the ground floor.

The outer walls of these walls forming the base of the building, can take certain unevenness of the ground, and receive at the option of the customer, a decorative coating in paint or local stones.

The foundations of the central or interior columns 12 are made of pilasters 150 of reinforced concrete, emerging in a ventilated vacuum and integral with square footings founded at the same level as that of the exterior foundations.

Basically, the plans of the reinforced concrete foundations are established for a soil with a work rate of 1.5 kg per cm ² . Other dimensions of foundations can be fixed depending on the soil encountered.

Front metal column foot module Weight per unit: 323.7 N. (FIG 1 and 1 BIS)

This module in HEA 140 profile (for housing) designated 11 with a total height of - 70 cm is delivered to the concrete mixer who seals it in the concrete walls, in the perfect geometric position when concreting these walls. The presence of the company's surveyor. is necessary at this time on the construction site to check the perfect positioning of these elements which constitute the base of the assembly.

These column base modules are also used to support the floor modules on the ground floor by means of an L-shaped yoke (80 x 80 x 8 mm) welded in the workshop to this column base; the upper ends are closed by flanges with four holes of diameter 0 18 mm and 150 x 125 x 10 mm welded over their entire periphery.

Metal column module on the front Weight: 814 N. (FIG 1 and 1 BIS)

This standard module 10 in HEA 140 profile for housing has a total height of - 2.76 m including the thickness of two footings (150 x 125 x 10 mm) each drilled with four holes of diameter 0 18 mm.

At the bottom, the column is drilled towards the inside of two holes 101 of diameter 0 18 mm allowing the bolting of an L 102 (of 80 x 80 x 8 mm) serving as a locking bar of the two neighboring lower floors and by the same bolts, the fixing of the lower crosspieces of the neighboring railing modules.

At a distance of 254 mm from the top of the column, a L 103 yoke (80 x 80 x 8 mm) is welded on three sides (the two side faces and the rear side - see Figure 2). This yoke serves to receive the assembly and to support in their tight position, the two upper neighboring floors. 0 18 mm diameter holes and bolting as previously indicated.

At the desired height, two holes are drilled on the underside for bolting the top crosspieces of the two neighboring railings.

The section of these columns has been checked for the stresses on vertical loads, as well as on horizontal forces due to wind and earthquakes for a building of five levels (ground floor and four floors) with a gable roof .

Central column modules (FIG 1 and 1 BIS) Weight: 1 piece = 1471 N.

This standard module 12 in profile IPE A 330 for housing has a total height of 2.76 m including the thickness of footings (320 x 150 x 10 mm) each drilled with four holes of diameter 0 27 mm.

As the drawing indicates, each column emerges 1.55 m above the upper level of the SLS frame of the lower floor, in such a way that this emergence serves directly as a support for the roof ridge and thus allows the standardization of this column module from its foundation where it is sealed by four pin bolts on the upper face of the foundation pilaster.

At the desired height is welded an L 121 shackle (80 x 80 x 8 mm) on four sides, intended to support and bolt after tightening, the four neighboring floors.

Likewise, at the place indicated, an oblong cutout 122 (150 x 50 mm) is provided in the neutral fiber of the core which will later allow the passage of the supply pipes - water - gas - electricity - telephony and heating of the connection network to be completed in situ.

Floor module (FIG 4 and 6) Weight: 12,625.5 N.

This standard module 20 in its basic construction may have a few variations depending on its piping equipment (kitchen - baintoilette - courtyard).

It is the basic module of the system and dictates the architectural composition plan.

It is formed by a chassis made of 1 SLS 10 "9 Lbs profiles composed of two beams 201 of - 5.537 m and three cross members 202 of - 2.325 m + two U 203 of 254 x 80 x 5 mm; the assembly is welded to the electrode by continuous leads to the contacts A U 204 profile of 254 x 80 x 5 mm forms a support for the slatted floor on the front 205.

• - le revêtement de sol mince collé (tapis plain, vinyl ou linoleum) 206.
• - un panneautage 207 en panneaux de particules de bois imprégné (type marine) grande densité ou d'aggloméré revêtu de stratifié épaisseur 19 mm. - un panneautage 208 en panneaux de laine de bois imprégnée faible densité (mou) épaisseur 12 mm ou de mousse de polyuréthane de même épaisseur
• - une tôle métallique cannelée formant hourdis 209 en tôle cannalée galvanisée épaisseur 0,75 mm
  • Cannelure hauteur 40 mm - largeur 40/187,5 ou tout autre profil
  • soudure par point au cadre en SLS
• - un quadrillage métallique 210 pour protection ou tout autre système métallique léger de fixation de cette isolation
  • isolation: laine de verre ou de roche
• - un matelas 211 laine de verre ou de roche épaisseur 70 mm.
• - trois contreventements horizontaux 212 - en fer à béton 0 12 soudés à l'électrode en cinq points
• - faux-plafonds 213 absorbant phonique résistant au feu 1 heure - placé en atelier contre le cadre en ossature de 1 SLS 10" 9 Lbs et support plafond intermédiaire U de 60/40/3 mm.

This chassis is fitted from top to bottom by:

• - glued thin floor covering (plain carpet, vinyl or linoleum) 206.
• - a paneling 207 made of high density impregnated wood particle boards (marine type) or of chipboard covered with 19 mm thick laminate. - 208 paneling in 12 mm thick low density (soft) impregnated wood wool panels or polyurethane foam of the same thickness
• - a corrugated metal sheet forming slabs 209 in galvanized cannalized sheet thickness 0.75 mm
  • Groove height 40 mm - width 40 / 187.5 or any other profile
  • spot welding to the frame in SLS
• - a metallic grid 210 for protection or any other light metallic system for fixing this insulation
  • insulation: glass or rock wool
• - a mattress 211 glass wool or rock, thickness 70 mm.
• - three horizontal braces 212 - concrete iron 0 12 welded to the electrode at five points
• - false ceilings 213 sound absorbing fire resistant 1 hour - placed in the workshop against the framework of 1 SLS 10 "9 Lbs frame and intermediate ceiling support U of 60/40/3 mm.

The entire floor has sound insulation from floor to floor such that the acoustic damping will be minimum 35 decibels for a frequency of 1,500 herz.

The fire stability of the floor element was measured by the CBLIA under the control of the Laboratory of Prof. HERPOL from the University of Ghent (Belgium) equal to a minimum of 2 hours on a large element, placed in an oven where the wood supply at the rate of 490.5 N / m ² allowed a temperature level of 700 ° C at the hearth for 2 hours.

If the floor covering has been consumed, the supporting framework has not undergone any deformation, the temperature level at its level never having exceeded 400 ° C.

On the other hand, the arrows measurements under static load in accordance with NBN 1 gave arrows lower than the arrows tolerated by this NBN 1.

In standard finishing, this floor contains ordinary electrical equipment which is supplied from a junction box fixed at the rear towards the central cladding or the interior cladding of the building.

The floors under the toilets (kitchen - baths - toilets) contain the consequent tubings.

All supply (water - gas - electricity - heating) or discharge (for clear water) pipes easily find their place in the grooves of a fluted metal sheet forming slabs 209 with trapezoidal waves and lead easily into the cladding central or indoor to be connected to the distribution network or the collector network.

The floor module 20 is equipped with the alignment of the facade both at its upper part and at its lower part by profiles 215 placed in the workshop and intended to receive the facade panels 60.

Finally, the floor module is equipped between the façade alignment and the railing by a metal grating 205 LAUFER system constituting gallery-gangway both for the assembly of the building and for its maintenance and the approval of the occupants. In addition, it serves as a sun visor to protect facades for tropical regions.

The slats 2051 of this "LAUFER" are inclined to obscure the views from bottom to top and vice versa, but are oriented in such a way that they screen the sunlight on the façades; in any case, the vertical ventilation of the facades is ensured unless certain occupants lay vinyl mats or other floor coverings for the sake of privacy and decoration.

As shown in FIG. 6A, the two lateral edges and the rear edge are fitted at the compound level with the panels 207 and 208 (19 mm + 12 mm) by a light profile 216 serving as mechanical protection and fixed to a U-shaped profile of shore 217, itself welded to the chassis in SLS, in particular to the spar 201. The height of the U 217 corresponds to the height of the grooved sheet metal 209. The light profile 216 contains a chamfered groove 2161 serving as a housing for a seal 2162 in soft neoprene which will be placed and glued when tightening the floors together.

In a variant shown in FIG. 6B, a U 2163 of light alloy or of zinc-plated steel is fixed to the U of the edge 217. The height of the U 2163 corresponds to that of the lower insulating panel 208. The U 2163 is open towards the outside of the floor so that the floor covering 206 (vinyl carpet, or in general textile) is folded back into the groove of the U and is fixed to the bottom thereof by a counter batten 2164. A sealing key 2165, advantageously in 60 Shore neoprene, is placed between the adjoining floors. When two adjoining floors are laid, an adhesive joint is applied to one of the edges, allowing the two vertical edges of the floor coverings to be glued.

8-piece staircase type floor modules (FIG 8)

At the level landings, the module in question 21 is taken from the standard floor module 20 of which only the first rear span has been completed, two spans out of three thus being eliminated. The rest of the bare chassis from which a cross member has been removed is installed in the same way as the standard modules 20.

Each beam 201 has the holes necessary for the bolting of two sections 211 forming support columns for the intermediate palms 22.

Intermediate bearing module Weight: 1,815 N. Metal box Weight: 1,570 N.

This module 22 includes a metal frame 2201 in 2 forming support beams (a UPN 160 profile on the front and a UPN profile at the stop of the floor landings) + two UPN 100 profiles at the ends of the module and three intermediate IPN 100 profiles .

The bearing itself consists of a metal box 2202 fixed to the first metal frame by screws. This box is finished with a vinyl coating 2203.

Stair columns: 4 columns per module

Weight: 4 x53 kg = 2,080 N

Stair bench module Weight: 2550 N = 2 bench tops of 1275 N.

By stage there are similar benches, these consist of two UPN 120 profiles designated 301 furnished with racks 302 in 55/8 mm flat iron; on these racks are bolted with interposition of packing felt, the reinforced terrazzo profiles forming step 303. (Flat section = 0, 305 x 0.08 m).

It is advisable to transport the terrazzo and framework elements separately to the site and do the assembly in situ.

These steps will receive temporary mechanical protection (wooden formwork or polyethylene sheet) during the building assembly period.

Handrail for a staircase 2 452.5 N designated 31.

The 311 circular railing elements in alignment with the internal stringer are built in the workshop and bolted on site.

Roof framing modules 40.

The roof structure consists of 401 crossbowmen (SLS 8 ") spaced 2.40 m each, laid with a slope of 17 ° 20 '= 31%.

The SLS 8 "crossbowmen (weight 687 N.), the ends of which are terminated by a 4011 plate (thickness 10 mm) to allow installation, are made up of two pieces - 5.55 m long at the level of the lower wing .

On the side of the channel 42 these rafters are placed on the two adjoining beams 4012 SLS 10 "9Lbs belonging to the framework of the floor-ceiling of the upper level; the horizontal thrust of the inclined roof is taken up by a profiled metal plate 4013 width 140 mm - thickness 10 mm at right angles extending to the outside of the HEA 140 column on the front, then rising vertically to maintain the track.

This profiled plate 4013 is fixed to each of the two beams 4012 and to the HEA 140 column head plate.

These rafters of the two roof slopes rest in the center on the central column 12 IPEA 330, by means of a folded flat stirrup 41 of width 140 mm and thickness 10 mm - forming a convex polygon with seven sides; the fixing is carried out by bolting.

The SLS 8 "rafters support 403 roof purlins spaced -1.30 m apart.

The purlins 1 SLS 3 "profiles are positioned using purlins 404 welded to the rafters.

Track modules

The framework of the channels 42 is produced by a prefabricated box of bakelized wood panels 421 ("marine" treated) with a thickness of 18 mm.

On the inside faces of this box is placed an aluminum sheet 422 (thickness 15/10 mm).

The dimensions of the track thus produced have a depth of 22 cm and a width of 45 cm.

The channel is provided with two directions of slope (longitudinal 0.55 cm / m and transverse 4 cm / m) to facilitate the flow of water.

The channel is completed by a flashing 423 on the one hand and by a parapet 424 on the other.

Rainwater drainage is ensured (on either side of the stairwells) by an aluminum bend 424 (thickness 15/10 mm) feeding an aluminum funnel (250 x 400 mm ^{2 -} thickness 8/10) leading to a section 426 descent square 130 x 130 in aluminum (thickness 8/10).

This descent is fixed to each stage by a collar 427 with lug - flat 30/5. The funnels are placed on two folded metal plates (width 30 mm; thickness 5 mm), fixed to the track itself.

Freestanding bin modules

• Type n° 4401 r.
• Ces bacs sont nervurés (nervures

trapézoïdales: profondeur h = 40 mm, côtés b = 40 mm, B = 60 mm) ils ont une longueur de - 5,55 m et ils reposent sur un minimum de 5 pannes 1 SLS 3", espacées de - 1,30 m entre elles.The roof covering is made in self-supporting trays 43 (750 mm module) made of aluminum sheet (natural state, thickness 8/10 mm). Length of tanks - 5.40 m.

• Type No. 4401 r.
• These bins are ribbed (ribs

trapezoidal: depth h = 40 mm, sides b = 40 mm, B = 60 mm) they have a length of - 5.55 m and they rest on a minimum of 5 purlins 1 SLS 3 ", spaced - 1.30 m between them.

The connection between two modules is made by completely covering the end ribs.

In the vicinity of the ridge, the finishing is carried out by a flashing 431 fixed to the polygonal profile (flat 140/10) 41.

The self-supporting trays are fixed to the purlins using hooks with a threaded head, sealing washer and protected nut.

The expansion joint is made by a V-shaped expansion piece.

Ridge module

The ridge 44 is made of modules of black prepainted galvanized steel sheet of length - 2.395 m corresponding to the frame of architectural modular composition. This sheet is folded at three angles determining two slopes in each slope.

The ridge plate is held by a flat 441 (width 140/6) profiled in the same way and fixed by bolting to the metallic flat 140/10 polygonal 41 with seven sides described above, this polygon being stiffened by a flat 442 of 200/10 mm. As Figure 9 shows, the ridge, by its method of attachment, organizes the upper ventilation of the roof.

The ridge is fixed with stainless steel screws and washers.

The joints between two ridge modules are completed with a butyl sheet on the interior and exterior faces.

Outdoor railing module 50

The railings of the terraces are prefabricated modules of external dimensions: length - 2.37 m - height 1.00 m - thickness 5 cm. They consist of a frame 501 in rectangular tubular profiles 100 x 50 x 3 mm welded at the corners.

Thirteen square tubular profiles 502 (30 x 30 x 3) welded to the frame are placed inside this frame 501.

The railing 50 is fixed by four 0 16 mm bolts (at the corners of the frame) attaching the frames to the wings of the HEA 140 columns on the facade 10 in a L 80/80/8 joint bar of 30 cm (not shown).

The dimensioning of the frame is planned so that it performs a longitudinal bracing role.

These railing modules can also be replaced by Saint André crosses in metal profiles and also forming bracing.

• Poids garde-corps:7 55 N
• Eclisse de liaison: 34,3 N

The frames are coated with a paint protecting them from oxidation.

• Railing weight: 7 55 N
• Connection plate: 34.3 N

Complete description of the modules facade sandwiches modulated on 1200 Solid panels

The facade panels 60 of floor height and modulated over 1.20 m are designed as sandwich panels with metal walls 601 and 602 with core 603 of POLYISOCYANURATE foam (K = 0.5 Kcal / m ² h ° C) d '' a minimum total thickness of 52 mm.

The interior facings 602 are made of galvanized sheet steel 0.63 mm thick with Primer paint.

The external facings 601 are made of galvanized steel sheet with a thickness of 0.63 mm with prepainted paint, in tone according to the manufacturer's shade card.

These facade elements are completely prefabricated in the factory and run longitudinally between the shore powders and behind the exterior structural columns.

Vertical sealing is achieved by two types of extruded profiles, one in P.V.C. form a key, the others in special profiles, which are pinched between the two covering sheets of the facade panels.

On the internal side, a 610 profile in galvanized steel is provided ensuring the upper fixing of the panels with tightening by a screw and rocker system.

The entire interior and exterior sealing device is completed by extruded profiles 611 of compressed neoprene on the two facings of the facade elements.

In the lower part, the panels are placed on a continuous 612 rail in galvanized steel profiles with the interposition of a horizontally threaded seal 613 in extruded neoprene, guaranteeing absolute air and water tightness.

GLASS PANELS Metal joinery: aluminum

The facade elements described above are associated with French-style aluminum joinery and having, on the banks, the same respective joints as the facade panels.

The horizontal continuity between panels and chassis is carried out edge to edge, by assembly on an alignment tab attached in the groove opposite.

The frames and doors are made of special light alloy profiles with screwed angles or assembled by splices.

The opening frames of the window frames are made up of special tubular profiles in light alloy with angles assembled by means of expansion bars in the core of the profiles.

The opening door frames consist of special tubular light alloy profiles with screwed angles.

Light alloy water discharges are provided at the cross members of the chassis, where water infiltration is possible.

The opening frames are sealed by neoprene seals.

Steel: The anchoring and fixing parts as well as

reinforcements and possible framework are in mild steel metallized with zinc at a rate of 450 g to 600 g of zinc per m ² of developed surface.

Light alloy: AI. Mg. Si. Anodizing natural shade

with a thickness of 20 microns.

.Float glazing clear, thickness according to standards

Ice cream parlors; factory fitted with extruded neoprene profile seals.

Pinion modules Top sprocket closure

Carried out by a simple non-insulated cladding, type n ° 4402 in galvanized steel, thickness 0.75 mm, pre-coated paint on the outside, thickness 75 microns, on the inside a layer of alkyd paint of 5 to 8 microns, fixing there self-tapping screws with plasticized head).

Finishing pieces, such as foot flashing, parapet and

The fixing is done on the beams of the floor frames and the HEA 140 front column.

Surface treatment of the different metal parts exposed to rust:

shot blasting, anti-rust paint in the workshop + one coat in tone in the workshop.

The foregoing description relates more particularly to a building for collective housing but the principle described above can be adapted to buildings comprising several spans of equal or different lengths and widths, that is to say floor modules of equal or different length can be built according to the same on site between several rows of columns.

This variant illustrated in FIG. 1a makes it possible to build school, hospital, office or laboratory buildings, with a central corridor and lateral wings located on either side of the central corridor.

the possibility of vertical technical ducts can also be reproduced as many times as there are rows of interior columns (12, 13) small joint floors of the width of the columns are placed in places where there are no vertical ducts for make the adjacent premises communicating.

Buildings with more than three spans and on several floors can also be constructed to meet hospital operating theater programs, renovated teaching rooms, offices and in general buildings with large floor areas.

Claims (4)

1. Industrialised multi-story steel building construction system comprising prefabricated steel elements finished at the works and assembled on the building site by bolting from conventional concrete foundations and comprising essentially frontage-pillar modules (10) and inner pillars modules (12, 13), landing modules (22), staircase modules (30), roofing modules (401), frontage-panel modules (60), inner partition modules (80, 90) and floor elements adapted to constitute floors, characterized by the fact that the elements intended for constituting the floors consists of floor modules each associated either with two frontage pillar modules (10) and two inner pillar modules (12), or with four inner pillar modules (13), the floor module and the pillars associated therewith constituting the modular unit of the building, the floor module (20) consisting of a frame made of steel sections including longitudinal beams (201) and cross beams (202, 204) welded to one another to form a rigid assembly provided, when seen in the downward direction, of a floor covering (206), with an overload distribution panel system (207), in case of need a sound and heat insulation panel system (208), of an intermediate corrugated iron sheet (209), of a wire netting (210) for holding in position a sound absorption bed (211), of a horizontal wind-brace (212), of a false ceiling, the metal floor (209) comprising recesses for housing the water, gas, electric and telephone conduits and lines, the height of the outer pillar modules (10), inclusive their welded top and bottom flanges, corresponding to one story, the flanges of said pillar modules being perforated to permit the assembling by bolting of a lower module with an upper module, the inner face of the outer pillar module (10) being provided with a sheet-metal bracket (102) welded to said face, said bracket (102) projecting on either side from said pillar (10), the projecting portions of said flanges being perforated and having a dual function, namely temporarily supporting the floor module (20) during the assembly phase, and acting as slide faces when shifting said floor module (20) for juxtaposing same with the floor module already set in its final position, and also to permit the lower assembling of the floor module with the pillar bracket by bolting, the height of said inner pillar modules (12, 13), including the sheet-metal flanges welded to their top and bottom ends, corresponding to one story, the flanges of said pillar modules being perforated to permit the assembling by bolting of the lower module with the upper module, the joint between two inner pillar modules (12, 13) being located substantially at mid-height of the story, both brackets (12) projecting from both sides of the pillar being welded to the two pillar faces parallel to the façade, at the proper level, so that each bracket can receive two adjacent floors, said brackets (12) having a dual function, namely temporarily supporting the floor module (20) during the assembly phase, and acting as slide faces when shifting this floor module (20) for juxtaposing same with the floor module already set in its final position, and also to permit the lower assembling between the floor module and the pillar bracket by bolting, an elongated hole (122) being cut in the web of the pillar module at the level of the floor module to permit the passage of any type of conduits or lines, each pillar module supporting four floor modules and the joint between said floor modules merges with the axis of the outer pillars (10) and inner pillars (12, 13).

2. The construction system of claim 1, characterized by the fact that the floor covering (208) and the overload distribution panel system (207) are merged into a single material serving both functions.

3. The construction system of claim 1, characterized by the fact that said longitudinal beams (201) of said floor (20) consist of I-section members.

4. The construction system of claim 1, characterized by the fact that for fixing the frontage panels a cold-drawn section member (215) of substantially U-shape in crossection is secured to the underface of the marginal crossmember (202) of the floor module with the interposition of a sealing joint, one wing (610) of said section member constituting a toggle means permitting the exertion of an adjustable pressure against the frontage panels, gasket means being inserted in the groove-forming bent edges of the section member.

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