Pricing sandwich panels and cold-formed steel sections from a shared layout

Distinguish repeated members from special pieces. Short sections around openings, joint supports and corner pieces can account for a significant share of labour. Include them in the enquiry to avoid supplementary orders. The drawing also lets you check that the selected panel lengths meet the supports at their intended positions.

Structure the schedule by façade bay, with separate lines for panels, supports and flashings. When a dimension changes, the associated items are easy to find. This is especially helpful around openings, where one short rail or flashing may be needed to finish the whole bay.

The price per metre reflects the quantity of steel, sheet thickness, grade and coating. Sections of equal depth can have different flanges and lips. Those dimensions affect weight and the space available for panel fixings. Before choosing a lower-priced Z section with a narrower flange, check that it meets the design requirements.

Check the full geometry of channels and sigma sections. For hat sections, include the crown width and the shape of the feet. Specify the protective coating for all galvanised sections. Compare prices on this basis and assess the effects of any substitution on both the calculations and the cladding detail.

Wider spacing reduces the number of rails or purlins while increasing panel span. Each steel member may also carry load from a larger area. Compare the cost of the complete assembly to establish whether a saving on steelwork reduces the total cost of the wall or roof.

Compare panels, sections, connections and labour for several technically suitable layouts. Include bearing widths and fastener counts. A different section may simplify a panel joint and eliminate additional pieces. Confirm that benefit on the connection drawing before including the saving in the estimate.

Sections cut to the agreed lengths can be delivered by member reference. Factory-punched holes simplify repeated connections when the drawings are settled. Moving a support centreline or reversing a member after fabrication may require further work. Allow for the cost of such changes when setting the procurement timeline.

Match panel lengths to the support layout and installation method. Longer panels can reduce the number of joints but need suitable transport and lifting arrangements. Include those requirements in the quotation when comparing delivery options.

Structural bolts, panel screws, washers, support cleats and bracing members each serve a specific purpose. Flashings, seals and joint materials are also required. The quotation should state which items are included and which must be ordered separately.

Clarify what each supplier calls a set. A bolt and nut assembly may exclude some of the required washers. A panel price per square metre may exclude roof edge accessories. An itemised schedule makes quotations easier to compare and reduces stoppages for small missing parts.

Use the catalogue to identify available sections, differences between variants and pricing units. For the actual order, obtain a dated quotation showing its validity period, tax basis and transport terms. Distinguish the manufacturing lead time from the date the material will reach the site.

Minimum delivery quantities and surcharges can affect small supplementary orders. An accurate schedule of sections and accessories therefore has a direct cost benefit. Combining deliveries can help if suitable storage is available for the time involved. Include the storage requirements for galvanised sections and panels in the work programme.

Compare quotations that identify material, fabrication, accessories, transport and the installation work included. Record exclusions and optional variants. If one supplier includes the full opening frames while another prices only the main rails, bring both to the same scope before comparing their totals.

Z sections, channels, sigma and hat sections can all have a place in a sandwich panel envelope. Assign their functions on a shared plan so lengths, bearing surfaces and connections can be ordered together. This reduces rework and omissions. The unit price of each section then forms one part of the cost of the finished wall or roof.