Secondary Frames

Secondary frame consists of the elements which support the roof and wall sheeting and which transfer loads to the primary framing.

Primary framing consists of:

• Roof Purlins
• Wall Girts
• Framing

• Roof Purlins

  Purlins are cold-roll formed Z profile, mainly 200 to 250 mm deep out of 1.6 to 2.5 mm thick steel. They are fixed to the rafters of the primary structure and due to the overlaps between the purlins on the rafters, act as continuous beams. Eave purlins can be C profiles or Z profiles. Connections are made using galvanized bolts.

 

• Wall Grits

  Girts are in cold-roll formed in C or Z shape 200 to 250 mm deep out of 2.0 to 3.15 mm thick steel.

  There are two types of fixation:

  Continuous with overlaps adjacent to the main frame columns, the connection being made using galvanized bolts directly into the column flangs.

  Simply supported between the columns, the connection being made using galvanized bolts into the column webs.

  The two fixation systems are valid for sidewalls and end walls.

 

• Framing

  Framing essentially consists of C or Z type profiles, produced by cold roll forming.