Plasterboards are used primarily as sheathing of the openwork structure of walls and ceilings in light frame construction systems and for finishing wall surfaces, replacing traditional wet-applied plasters. Large planes of plasterboards require stiffening from the bottom with a load-bearing structure, if they are not connected to the substrate over the entire surface with gypsum glue or point fixings. Cold-formed galvanized profiles made of galvanized steel sheet are most often used as the load-bearing structure.
Profile division:
• Wall profiles for lightweight partition walls:
– load-bearing section of the CW partition wall – they are vertical profiles (bar) offered in three dimensions: CW 50; CW 75; CW 100, o a non-load-bearing section of the UW partition wall – these are horizontal profiles offered in three dimensions: UW 50; UW 75; UW 100. c Ceiling profiles for suspended ceiling structures: o load-bearing suspended ceiling section CD 60,
– non-load-bearing suspended ceiling section (wall) UD 27
– additionally load-bearing hat section KD.
• Frame sections intended for embedding doors in partition walls and for making wall reinforcements in interior development systems made of plasterboards. Frame profiles are available in 3 dimensions: UA50; UA75; UA100.
The choice of one of the listed sets of profiles depends on the bending strength requirements of the finished wall. Manufacturers in detailed studies specify the maximum height of the walls, that can be built from different types of profiles.