Ventilation ducts and any inspection doors used in them should be made of non-flammable materials, and combustible thermal and acoustic insulation as well as other combustible cladding of ventilation ducts may be used only on their outer surface, …
Author Archives: lore
Movement of smoke in a building structure
The basic factors causing the movement of smoke in a building are:
– chimney effect,
– heat emitted during a fire,
– Atmospheric conditions, especially wind and temperature,
– operation of mechanical air transport systems.
Floating is observed within the fire compartment …
System of sliding doors made of profiles and rails
Installed in no time – door system made of profiles and rails.
The door system of the cabinets we present consists of door frames and guide rails fixed to the floor and ceiling.
The kit also includes the necessary wheels, fasteners and elements …
Concreting with bags and coatings
Concrete mix in Hessian bags is sometimes used to build massive slabs or walls at the bottom of reservoirs by divers and to fill prefabricated structures with concrete. (made of thick fabric impregnated with bitumen). The bags are partially filled with fresh mixture and lowered under water to …
Rack for hi-fi equipment
Glued into a light bow – plywood cover.
Making a rack for hi-fi equipment also requires the purchase of a properly finished glass, not requiring further processing. Glass plates must be cut to size and have carefully sanded edges. Much more interesting is in …
Concreting under water
Concreting should be preceded by the determination by a specialized laboratory of concrete components and its recipe as well as checking the characteristics of the mixture produced under construction conditions.. All concrete additives (plasticizers, sealants and set retarders) should have approvals and be laboratory tested.
Water, w której …
The course of concreting under water
Concrete should be used only from factories, which ensures strict compliance with the requirements for the production of a mixture intended for installation under water. The plant should produce a mix with a consistency appropriate for underwater concreting and in the case of high air temperature or long transport time, …
Underwater concrete structures
Underwater concrete structures are currently built on the bottom of the oceans at depths up to 1000 m. Up to approx 300 m are concreted "in situ". At greater depths - they are assembled from prefabricated elements made on land and connected under water with concrete joints there …
The dimensions of the gap of the ventilated flat roof
Because a steep flat roof is exposed to moisture from the outside due to rainfall, and from the inside by the water vapor flowing through the partition to the outside, therefore, over the living quarters of the attic, ventilated slotted flat roofs should be built instead of solid flat roofs. Roof ventilation is possible …
Technical thermal parameters of partitions
The thermal insulation properties of the partitions are characterized by the heat transfer coefficient, denoted by the letter U. This coefficient determines the amount of heat flowing through a m² of partition in time 1 hours, when the air temperature difference on both sides of this partition is 1 degree. Inverse of the permeation coefficient …