GB2127083A

GB2127083A - Method of mounting a balcony

Info

Publication number: GB2127083A
Application number: GB08323384A
Authority: GB
Inventors: Curt Willy Persson
Original assignee: Stalstommar & Byggmontage Komm
Current assignee: Stalstommar & Byggmontage Komm
Priority date: 1982-09-01
Filing date: 1983-08-31
Publication date: 1984-04-04
Also published as: DE3331434A1; GB8323384D0; DK396083A; SE8204976D0; FR2532351A3; SE430265B; DK396083D0

Abstract

A method of mounting a balcony on the outer wall 2 of a building, working from the exterior. An opening 5 is made in the wall and upper and lower bracing plates 6, 7 are cast therein. A support beam 1 is clamped at one end between the plates 6, 7 and the opening 5 is filled in. A second beam 1 is similarly installed, and a concrete floor slab 3 is then rested on the beams 1. <IMAGE>

Description

SPECIFICATION Method of mounting a balcony The present invention relates to a method of mounting balconies, from the exterior, on the outer walls of buildings.

A reliable method of mounting balconies from the exterior so as to replace old worn-out balcony structures does not exist at present. In order to make the new structure sufficiently stable, it has hitherto been necessary to work from the interior. However, such operations carried out from the interior on balconies and the outer walls are costly and, in event of fires, are disadvantageous since the load-bearing parts of the balcony can become distorted and the balcony may fall away.

The object of the present invention is to eliminate the disadvantages and to enable the balcony to be mounted by means of a method carried out from the exterior. To achieve this object and in accordance with the invention, the method is characterised in that the outer wall is provided with an opening, an upper and a lower bracing plate is secured in the opening by casting, a balcony-carrying beam is pushed between the bracing plates, the balconycarrying beam is firmly clamped againstthe bracing plates, the opening is closed by casting, and a concrete slab is arranged between two balconycarrying beams so that it rests against them.

The invention will now be described in greater detail by reference to the accompanying drawings in which Figure lisa plan view of a balcony which has been mounted by the method of the invention; Figure 2 is a side view of the balcony; Figure 3 shows how the balcony is arranged in the outer wall; and Figure 4 illustrates the mounting of the balcony from the front.

As already stated, the object of the present invention is to provide a method of mounting a balcony, from the exterior, on an outside wall and preferably as a replacement for an old worn-out balcony that could be repaired only at very considerable cost. The method of mounting must therefore be attractive from the cost point of view and must nevertheless meet the specifications as regards load-bearing capacity, resistance to fire and functionability, while at the same time the method must be capable of being used on existing structures.

The balcony illustrated in the drawings comprises two load-bearing balcony-supporting beams 1, preferably made of stainless steel, which are clamped in an outer wall 2, of a building, a concrete slab 3 which is suspended in the air from the supporting beams 1, and an balustrade 4, which is arranged in a triple manner on the supporting beams 1 and/or the concrete slab 3.

The supporting beams 1, which are preferably of L-shaped cross-section, are secured to the exterior wall 2 in the following manner: An opening 5 for each supporting beam 1 is -med in the wall 2. The opening 5 is pressure ed in both the upward and downward directions so as to determine whether the wall 2 is capable of withstanding the forces that will be later applied by the finished balcony structure. The pressure-testing is carried out in a known manner and does not therefore require to be described in detail. If the pressure test has a positive result, an upper and a lower bracing plate 6 and 7 respectively are cast into the opening (see Figure 3 in particular).The plates 6 and 7, which are preferably made of steel, are secured at the top and bottom in the opening 5 by casting using preferably expanding mortar 8 that is suitable for use at the particular time of the year (air temperature). A suitable mortar is a concrete having a very high density whereby high stability is achieved. To achieve particularly high stability, the bracing plates 6 and 7 are preferably cast in at points spaced from both the inner face and the outer face of the wall 2, said plates being disposed entirely in the outer wall. In the next step, the L-shaped supportbeam 1 is pushed into the orifice and between the bracing plates 6 and 7. The supporting beam 1 is clamped against the bracing plates with one of its limbs, limb 9, bearing against the lower bracing plate 7 and with its other limb 10 extending upwardly.The clamping operation is carried out by means of an expanding device 11 which can be firmly fitted beforehand in a suitable manner; for example, it can be welded to the beam at a pressure-applying point suitable for its operation, or it can be mounted after the supporting beam has been introduced into the orifice. In the illustrated arrangement, the expanding device comprises a sleeve 12 into which project bolts 13 and 14 having a left-hand and right-hand thread respectively, which bolts are pushed outwardly in opposite directions by rotation of the sleeve. The bolt 13 is thus pressed against the upper bracing plate 6, whereas bolt 14 firmly clamps the horizontal limb 9 on the supporting beam 1 against the lower bracing plate 7 (see Figure 4). After the structure has been checked, the opening 5 is closed preferably by casting, again using a high-density concrete.The concrete slab 3 is so placed that it bears against the horizontal limb 9 as well as against the vertical limb 10 of each supporting beam. The tolerances between the concrete slab 3 and the supporting beams 1 are so small (1 to 2 mm) that the slab cools the steel supporting beam in the event of fire, which must therefore burn for a fairly long period before movements occur that loosen the supporting beams from the outer wall. The concrete slab 3 is preferably prefabricated and comprises gullies 15forthe draining of water. Furthermore, mountings 16 for securing the balustrade 4 are provided, and the outer' faces are treated beforehand.

The present invention can be modified, within the Claims set forth below, without departing from its purpose. A gap is preferably present between the concrete slab and the wall so as to prevent the transfer of cold and the transmission of movements.

1. A method of mounting a balcony from the exterior on an outer wall of a building, characterised in that the outer wall is provided with an opening, an

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Method of mounting a balcony The present invention relates to a method of mounting balconies, from the exterior, on the outer walls of buildings. A reliable method of mounting balconies from the exterior so as to replace old worn-out balcony structures does not exist at present. In order to make the new structure sufficiently stable, it has hitherto been necessary to work from the interior. However, such operations carried out from the interior on balconies and the outer walls are costly and, in event of fires, are disadvantageous since the load-bearing parts of the balcony can become distorted and the balcony may fall away. The object of the present invention is to eliminate the disadvantages and to enable the balcony to be mounted by means of a method carried out from the exterior. To achieve this object and in accordance with the invention, the method is characterised in that the outer wall is provided with an opening, an upper and a lower bracing plate is secured in the opening by casting, a balcony-carrying beam is pushed between the bracing plates, the balconycarrying beam is firmly clamped againstthe bracing plates, the opening is closed by casting, and a concrete slab is arranged between two balconycarrying beams so that it rests against them. The invention will now be described in greater detail by reference to the accompanying drawings in which Figure lisa plan view of a balcony which has been mounted by the method of the invention; Figure 2 is a side view of the balcony; Figure 3 shows how the balcony is arranged in the outer wall; and Figure 4 illustrates the mounting of the balcony from the front. As already stated, the object of the present invention is to provide a method of mounting a balcony, from the exterior, on an outside wall and preferably as a replacement for an old worn-out balcony that could be repaired only at very considerable cost. The method of mounting must therefore be attractive from the cost point of view and must nevertheless meet the specifications as regards load-bearing capacity, resistance to fire and functionability, while at the same time the method must be capable of being used on existing structures. The balcony illustrated in the drawings comprises two load-bearing balcony-supporting beams 1, preferably made of stainless steel, which are clamped in an outer wall 2, of a building, a concrete slab 3 which is suspended in the air from the supporting beams 1, and an balustrade 4, which is arranged in a triple manner on the supporting beams 1 and/or the concrete slab 3. The supporting beams 1, which are preferably of L-shaped cross-section, are secured to the exterior wall 2 in the following manner: An opening 5 for each supporting beam 1 is -med in the wall 2. The opening 5 is pressure ed in both the upward and downward directions so as to determine whether the wall 2 is capable of withstanding the forces that will be later applied by the finished balcony structure. The pressure-testing is carried out in a known manner and does not therefore require to be described in detail. If the pressure test has a positive result, an upper and a lower bracing plate 6 and 7 respectively are cast into the opening (see Figure 3 in particular).The plates 6 and 7, which are preferably made of steel, are secured at the top and bottom in the opening 5 by casting using preferably expanding mortar 8 that is suitable for use at the particular time of the year (air temperature). A suitable mortar is a concrete having a very high density whereby high stability is achieved. To achieve particularly high stability, the bracing plates 6 and 7 are preferably cast in at points spaced from both the inner face and the outer face of the wall 2, said plates being disposed entirely in the outer wall. In the next step, the L-shaped supportbeam 1 is pushed into the orifice and between the bracing plates 6 and 7. The supporting beam 1 is clamped against the bracing plates with one of its limbs, limb 9, bearing against the lower bracing plate 7 and with its other limb 10 extending upwardly.The clamping operation is carried out by means of an expanding device 11 which can be firmly fitted beforehand in a suitable manner; for example, it can be welded to the beam at a pressure-applying point suitable for its operation, or it can be mounted after the supporting beam has been introduced into the orifice. In the illustrated arrangement, the expanding device comprises a sleeve 12 into which project bolts 13 and 14 having a left-hand and right-hand thread respectively, which bolts are pushed outwardly in opposite directions by rotation of the sleeve. The bolt 13 is thus pressed against the upper bracing plate 6, whereas bolt 14 firmly clamps the horizontal limb 9 on the supporting beam 1 against the lower bracing plate 7 (see Figure 4). After the structure has been checked, the opening 5 is closed preferably by casting, again using a high-density concrete.The concrete slab 3 is so placed that it bears against the horizontal limb 9 as well as against the vertical limb 10 of each supporting beam. The tolerances between the concrete slab 3 and the supporting beams 1 are so small (1 to 2 mm) that the slab cools the steel supporting beam in the event of fire, which must therefore burn for a fairly long period before movements occur that loosen the supporting beams from the outer wall. The concrete slab 3 is preferably prefabricated and comprises gullies 15forthe draining of water. Furthermore, mountings 16 for securing the balustrade 4 are provided, and the outer' faces are treated beforehand. The present invention can be modified, within the Claims set forth below, without departing from its purpose. A gap is preferably present between the concrete slab and the wall so as to prevent the transfer of cold and the transmission of movements. CLAIMS

1. A method of mounting a balcony from the exterior on an outer wall of a building, characterised in that the outer wall is provided with an opening, an upper and a lower bracing plate are firmly secured in the opening by casting, a balcony-supporting beam is pushed between the bracing plates, the balcony supporting beam is firmly clamped against the bracing plates, the opening is closed by casting, and a concrete slab is arranged between two said balcony-supporting beams so that it rests against them.

2. A method according to Claim 1, characterised in that the bracing plates are firmly connected to each other by casting using a concrete which also serves to fill the opening.

3. A method according to Claim 1 or Claim 2, characterised in that the opening is filled with a high-density concrete.

4. A method according to Claim 1, characterised in that the balcony-supporting beam is firmly clamped against the bracing plates by an expanding device which comprises a sleeve and bolts having left-hand and right-hand threads respectively, which bolts are pushed in opposite directions by rotation of the sleeve.

5. A method according to Claim 4, characterised in that the expansion device is arranged on the balcony-supporting beam before the latter is pushed between the bracing plates.

6. A method according to Claim 1, characterised in that the bracing plates are spaced from the inside of the wall as well as from the outside of the wall so thatthey lie completely within the wall.

7. A method according to Claim 1, characterised in that the balcony-supporting beam is L-shaped and has one limb bearing against the lower bracing plate whereas the other limb extends upwardly.

8. A method according to Claim 1, characterised in that the concrete slab is so placed that it bears against both horizontal and vertical limbs of the balcony-supporting beams.

9. A method of mounting a balcony, substantially as hereinbefore described with reference to the accompanying drawings.