Fire-fighting cutting and receding of the heating furnace

At the moment, many more residential buildings are heated by stoves and boilers of various types. Accordingly, the number of fires, the cause of which was a violation of the rules of PB during their operation, is also large. What is it - during the furnace, there is a strong heating of the external surfaces not only of the walls of the furnace body, boiler, but also of the structures of the flue that removes incandescent flue gases into the atmosphere.
Fire-fighting cutting is an increase in the width of the walls of the buildings of heating units - stoves, fireplaces, boilers or chimneys, channels in places / zones of direct contact with building structures of objects made of combustible, non-combustible materials.
A fire-fighting retreat is a space, the distance between the outer surfaces of the walls of the buildings of furnace units, heating equipment or smoke ducts and unprotected or protected from constant heating, ignition walls, partitions made of combustible, non-combustible building materials.
Purpose The main purpose of fire-fighting cuts, retreats is to prevent the occurrence of fires in places of direct air contact of the heated surfaces of heating equipment with combustible, difficult-to-burn building structures.
To understand the material, it is worth clarifying some definitions:
Furnaces are devices designed for the complete combustion of various types of solid materials, for heating the premises of objects, such as locally assembled installations made of fire-resistant materials - bricks, refractory concrete, flame-retardant pastes, non-combustible mastics; or in factory conditions made of metal alloys.
Fireplaces are types of stoves, characterized by a larger area of open firebox openings, the absence of smoke turns.
A chimney, a chimney is a rectangular, circular shaft, necessary to create an upward thrust of heated flue products of the combustion process, their removal into the atmosphere. Goryach Gorenje, a chimney, a chimney, a chimney, a chimney, a chimney, a chimney, a chimney, a chimney, a chimney, a chimney, a chimney, a chimney, a chimney, a chimney, a chimney.
A smoke channel, a pipe can be of several types of execution: a nozzle, resting on the ceilings of construction objects; a wall, passing inside the capital walls; a root, resting on the foundation of buildings, floors, next to the heating unit.
The indentation is either open or closed.
Cutting - up to combustible structures of a construction object;
to structures protected by wet plaster on a metal grid, other fire-resistant materials.
Before the start of the heating season, the head of the organization, the owners of residential buildings (households) are required to carry out inspections and repairs of stoves, boilers, heat generators, heaters and fireplaces, as well as other heating devices and systems.
It is forbidden to operate stoves and other heating devices without fire-fighting cuts (indentations) from combustible structures, pre-heating sheets made of non-combustible material with a size of at least 0.5 x 0.7 meters (on a wooden or other floor made of combustible materials), as well as in the presence of burnouts and damage in the cuts (indentations) and pre-heating sheets.
Faulty stoves and other heating devices are not allowed to operate.

DES of Ulan district