Archiwa Steel sections

Where Z-purlins can save money on a steel building roof
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Where Z-purlins can save money on a steel building roof

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Where Z-purlins can save money on a steel building roof

Z-purlins are a popular element of steel roofs. Their advantage lies in the possibility of building orderly purlin layouts from parts prepared for assembly. This can bring material and organisational savings. However, these do not follow from the name of the section alone. Cold-formed profiles must be selected for loads, frame spacing and cladding. Only then can it be assessed which solution will be beneficial for the investor. The spacing of the main frames affects the span length of the purlins. The purlin spacing, in turn, affects the load on each of them and the performance of the covering. These decisions are interrelated. Reducing the number of profiles may increase the requirements placed on the remaining elements. Optimisation should therefore cover the roof as a whole. It is not enough to remove a few lines of support from the drawing.

By PiVi|2026-11-15T03:59:30+01:002023-10-18|Knowledge base|Comments Off

When should sigma sections be included in structural quotations?

If the design permits several solutions, it is worth comparing more than just the prices of similar C-sections. Sigma profiles can be a separate variant of the layout. Additional web bends allow their properties to be shaped. In the right application this is a useful feature. However, the assessment should cover the entire structure. Cold-formed profiles are selected for a specific task, so a favourable quotation must show more than just the mass of steel per metre. First, the function of the element and the requirements must be stated. This may be a purlin, a rail or another part of the system specified in the documentation. Loads, spans and support conditions are needed. Only such a description allows a suitable sigma profile to be selected. It makes no sense to compare random sections that merely have a similar height.

By PiVi|2026-11-15T18:56:25+01:002022-06-15|Knowledge base|Comments Off

Complete connections for steel sections: avoiding gaps between contractors’ responsibilities

One company supplies the main structure, a second the profiles and a third the cladding. Such a division can work smoothly if the scopes meet at clearly described points. Most misunderstandings arise at the connections. Cold-formed profiles require screws, brackets, splice plates and stabilisation selected for the project. It is worth establishing who prepares them before comparing final tender prices. A general phrase such as 'purlin supply' does not say whether it includes the connection to the frame. It may cover just the Z-sections or a complete system with accessories. This must be stated explicitly. It is worth using a drawing of a typical connection detail and assigning the parts to suppliers. Then each party sees what it is responsible for and which element it must connect to.

By PiVi|2026-11-15T18:56:29+01:002022-03-30|Knowledge base|Comments Off