Choose a building family to request supplier matching for your site and design basis.
A catalog entry is a starting point for an RFQ. For a portal frame, give suppliers the clear span, bay spacing and eave height, with the site address and engineer-issued design loads when available. A warehouse with a future crane runway and a workshop with a suspended service rack may have the same footprint while requiring different reactions, bracing or secondary steel. Have the supplier identify those allowances explicitly.
Compare whether each package includes the frame, purlins, girts, bracing, roof sheets, wall cladding, anchors and fasteners. For envelope quotations, record the sandwich panel core, thickness and published thermal data. Ask the project team how fasteners and girts affect thermal bridging, and how the proposed assembly handles openings and fire separation.
Where an oversized door breaks a bracing bay, ask for the location of substitute bracing on the supplier drawing. For a hangar, tie the quoted opening to the required clear width and height with tracks, motors and trim installed. Treat the foundation interface as a separate review and ask for anchor setting dimensions and frame reactions by load case.
Normalize freight and installation boundaries before comparing totals. A shipped steel package may exclude concrete, local unloading, erection equipment and field touch-up. Confirm whether its longest members fit the planned load and whether field splices are included in the engineering scope. Any split between supplier and local installer should be recorded in the quotation matrix with an owner for each handoff.
The selected supplier is responsible for manufacturing and its supporting records. Have the project engineer confirm applicable codes, design loads and acceptance criteria for the site. Use the inquiry to flag unknowns so they stay open in the comparison until the responsible party verifies them.