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Secondary Structure.
Roof purlins and wall transoms
The function of secondary elements in Atlas Ward structures is fulfilled by Multibeam system. It is a system of roof purlins and wall transoms of Sigma type, manufactured under license of Atlas Ward. Sigma profiles are the stiffest cold-bent profiles of the most advantageous geometry of section. Owing to these advantages, the secondary structure is able to carry a part of the loads, thus allowing for better static optimization of a hall. It means, among others, a possibility of applying greater spacing of main frames.
Accessories
As a supplement for purlin and transom systems there are systems of tubulary and apex ties, which form, along with the main floor beams, a stiff roof and wall shield. |
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Characteristics of Multibeam system:
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quality: |
Cold-bent profiles manufactured under license Atlas Ward. |
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material: |
Made from galvanized steel of high strength (350N/mm 2) protected against corrosion with a layer of zinc 275 g/m 2. |
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load-carrying capacity and stiffness: |
They are characterized by high load-carrying capacity and stiffness at a very small deadweight. |
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fastening: |
They are fastened using bolts of class 8.8 to welded bolsters to steelwork structure. |
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Frame elements
Window, door and gate frames are made from cold-bent profiles from galvanized steel sheet, joined with self-drilling screws.
Elements of frames are also fastened to ground beams or to floor using expansion bolts. In the case of great spacing of frames, hot-rolled elements are applied, too [channel irons or I-sections].
The manner of making a frame is individually adjusted to the opening, depending on its size and location.
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| Details of opening flashing |
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| Ways of flashing openings with profiles |
Window |
Gate |
Door |
Roof purlins and wall transoms - connection solutions
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