What do cold-formed steel sections cost, and how do you compare quotes?

This applies to Z-sections, C-sections and sigma profiles. For omegas, the width of the crown and of the entire cross-section must also be checked. In a request for quotation, it is best to include a drawing or a full designation with dimensions. The phrase galvanised profile 200 mm high alone does not give the supplier enough data for an unambiguous quote.

Increasing the thickness usually increases the amount of steel used, but the effect on the cost of the finished system is broader. It can change the permissible spacing or the connection requirements. The grade of material should also be stated explicitly. A profile made from a different steel should not be ordered as a substitute without a design assessment.

It is worth checking what the stated thickness refers to and which tolerances apply. The offer should contain data consistent with the product documentation. If different quotes refer to different assumptions, the comparison of amounts is illusory. This discrepancy is best clarified before ordering, not during material inspection on site.

Galvanised profiles are available with various surface protections. In addition to zinc coatings, other metallic coatings are also found. Their designations describe specific solutions, not a general level of quality. The quote should refer to the same type of protection that was adopted for the service environment.

Additional painting, surface preparation or documentation requirements can affect the price and the delivery date. They should not be removed from the scope merely to obtain a lower rate. If the conditions on the project allow a change, it must be agreed technically. Only then will the comparison show the cost of equivalent solutions.

Cutting to length can reduce waste and work on site. At the same time, very long elements require suitable transport, unloading and space for manoeuvring. Production lengths should be compared with access and installation possibilities. The smallest number of pieces does not always mean the lowest cost of execution.

For Z-profiles, the material needed for laps must be taken into account. It is not enough to count only the length of the roof slope between the outermost supports. Similarly, connections and edge trims require specific lengths. The cutting list should be derived from the design. Using offcuts is beneficial only where the approved details allow it.

A practical calculation is best carried out using a finished list of pieces. For example, 20 lengths of 5 m give 100 m of profile. At a catalogue mass of 5.42 kg per metre, this is 542 kg for the lengths alone. Only then are the other delivery items added to this schedule. The calculation helps to prepare the cost and unloading, but does not replace structural selection.

Some offers include prepared holes, while others require additional agreement. The scope of processing, the number of component types and the way documentation is provided must be checked. Factory perforation can reduce labour, but its value depends on the correctness of the drawings. Incorrectly positioned holes do not save time.

Bolts, washers, brackets, connectors and bracing form a separate item. It is worth checking whether the bolt set contains all the necessary parts. The trade names of sets can vary. A detailed list with quantities is best. It allows two offers to be compared without subsequently adding missing items.

The price list presents specific variants and conditions valid in a given version of the document. The current offer may depend on the order size, processing and logistics. Its validity period should be checked, as should whether prices are net or gross. The transport cost and any logistical minimum should be visible separately.

It is not advisable to transfer an amount found in an older document into the budget without confirmation. The market and delivery conditions can change. More useful than a single price is knowing what we are paying for. This allows the order to be adjusted, deliveries to be combined or unnecessary operations to be reduced without lowering structural requirements.

The final summary should include cold-formed profiles, accessories, transport, unloading and labour. Any work related to correcting the documentation should also be taken into account. A variant requiring many cuts and additional holes may cease to be advantageous. Well-prepared prefabrication, by contrast, helps to organise the team’s working time.

Prepare a single request for all the quotes being compared. State the section types, dimensions, material, coating, lengths, holes and the expected scope of delivery. Z-sections, C-sections, sigma profiles and omegas will then be priced according to the same rules. Choosing the most favourable offer becomes a decision based on the complete cost, not on an accidentally lowest number in a column.