# US 4,391,070 A · Chimney

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- Number: US 4,391,070 A
- Document ID: US4391070A
- Status: Granted
- Kind: A
- Application number: 06/239,116
- Filed: 1981-02-27
- Granted: 1983-07-05
- Earliest claimed: 1980-02-29
- Assignees: Babcock-Bau GmbH
- Inventors: Manfred Bonnighausen
- Web page: https://patentgrep.com/patent/US4391070A

## CPC

- E04B 1/3511: {Lift-slab; characterised by a purely vertical lifting of floors or roofs or parts thereof}
- E04H 12/28: Chimney stacks, e.g. free-standing, or similar ducts (chimneys as part of buildings E04F17/02)
- F23J 13/02: Linings; Jackets; Casings
- E04B: GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B1/00; {electromagnetic shielding H05K9/0001})
- E04H: BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL (foundations E02D)
- F23J: REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES (combustion apparatus for consuming smoke or fumes, e.g. exhaust gases, F23G7/06)

## Abstract

A chimney construction arrangement in which the load-bearing external trunk is built in sliding or climbing shuttering and supports platforms with support arms for accommodating the flue gas pipe or the flue gas pipes. Support elements are formed on the inner wall of the external trunk at the planned levels of the platforms. The platforms are built completely within the external trunk at ground level and raised to respective levels with lifting equipment. The platforms are connected with the support elements. The support elements may be individual brackets. A plurality of platforms may be raised as a group and individually attached to the support elements.

## Claims

### Claim 1

Method for constructing a chimney having a loadbearing external trunk which is built in sliding or climbing shuttering and supports platforms for accommodating flue gas pipe or flue gas pipes, comprising the steps: forming support elements on the inner wall of the external trunk at planned levels of the platforms; constructing said support elements as individual brackets; providing the platforms with support arms; building the platforms with support arms completely within the external trunk at ground level; raising the platforms to respective levels with lifting equipment; passing each platform by the brackets when being raised to a respective level; turning the hanging platform by an amount so as to locate its support arms above the brackets; and then lowering the platform with supporting arms onto the brackets, said platforms and support elements being prefabricated.

### Claim 2 (depends on 1)

Method according to claim 1, wherein a plurality of platforms are raised as a group and are individually attached to the support elements.

### Claim 3 (depends on 1)

Method according to claim 1, wherein the platforms are built in superposition within the external trunk by using a shuttering.

### Claim 4

Chimney comprising: a load-bearing external trunk and a plurality of platforms accommodating the brickwork of flue gas pipe means; said platforms having support arms resting on support elements of said external trunk; said support arms resting on said support elements; said support elements comprising individual brackets; and positioner means acting in horizontal direction between said external trunk and at least one of said support arms, said support elements being formed on the inner wall of the external trunk at planned levels of the platforms, said platforms with support arms being built completely within the external trunk at ground level, each platform passing by the brackets when being raised to a respective level, a hanging platform being turned by an amount so as to locate its support arms above the brackets and then lowered onto the brackets, said platforms and support elements being prefabricated.

### Claim 5 (depends on 4)

Chimney according to claim 4, including removable erection beams for lifting equipment and connected with said support arms.