Abstract: The inner wall of a combustion chamber is composed of a plurality of ceramic plates which are suspended from the outer wall of the chamber by being hooked over mounting portions of the outer wall; this eliminates the need for screws, bolts, welds or the like and facilitates mounting and dismounting of the plates. The plates define with the outer wall a clearance into which cold air is admitted; the upper and lower edges of adjacent plates define with one another respective air gaps communicating with this clearance so that air streams enter the combustion space through these gaps. These air streams prevent the deposition of ash and other contaminants on the inner surfaces of the plates.

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.