Please list the causes of problems with the adhesion of coatings to zinc and galvanized steel substrates.:
1. Nowe powierzchnie cynkowe …
Wooden cube in the room
Wooden paving stone is a versatile floor covering. It consists of rectangular or round blocks, which, juxtaposed with each other, create a floor surface with extraordinary load capacity (high abrasion resistance). The faces of the blocks are pointing up.
The use of a wooden cube is possible in …
Spring-operated "separate function" control mechanism, used in fire ventilation cut-off dampers – current impulse control
Spring-operated "separate function" control mechanism, used in fire ventilation cut-off dampers – current impulse control
In this type of mechanisms, the transition to the safety position is initiated by an electromagnetic release that releases the bolt of the spring drive of the damper., while moving to an item …
Control of fire shut-off dampers and fire ventilation shut-off dampers
During normal operation of ventilation and air conditioning systems, fire dampers remain open, Fire ventilation cut-off dampers, however, remain closed. During the normal operation of the facility, both cut-off fire dampers and fire ventilation cut-off dampers, so they remain in a waiting position. …
Errors in the installation of fire dampers
The most common assembly errors
The most common installation error, which in most cases result from ignorance or ignorance of the assembly and operating instructions of the manufacturers, belong:
– not keeping the border of the damper bricking, preventing the damper from maintaining the required fire resistance,
– incorrect …
Building conditions that endanger people's lives
The basis for recognizing a building as being life-threatening is not ensuring the possibility of evacuating people in the event of a fire, which includes in particular:
1) passage width, access or emergency exit, either the flight or landing of the staircase used for evacuation, less than one …
Fire separations of the building
Walls and ceilings that are elements of fire separation, should be made of non-flammable materials, and their openings are enclosed with fire atriums or closed with fire doors, or another fire closure. The total area of these openings if they occur in …
Laying a wooden floor on floor joists
Laying on floor joists
The professionally made bottom joist structure is covered with laminated boards of min. 22 mm thick or solid planks (grub. 26 mm). The laying process and construction of the floor surface are essentially similar to that described, floating stacking …
Spring-operated "separate function" control mechanism, used in cut-off fire dampers – current break control
Spring-operated "separate function" control mechanism, used in cut-off fire dampers – current break control
The only difference is to use an electromagnetic release device without a permanent magnet instead of an electromagnetic release with a permanent magnet. This electromagnet to produce the field …
"Separation of functions" control mechanism with spring drive, used in cut-off fire dampers – current impulse control
In case of, when moving to the safety position, it is initiated by an electromagnetic release that releases the bolt of the damper spring drive, and transition to the standby position is ensured by an independently powered electromechanical rotary actuator, we say, that it is a "separated function" control mechanism solution for safety from …