Planning & documentation
Reusing Individual Purlins and Girts from Metal Buildings
Review salvaged metal building purlins and girts through member identity, orientation, holes, damage, proposed use, and controlled segregation.
Understand the project condition
A contractor may receive loose purlins or girts removed from a metal building and propose them for a new roof or wall. Matching depth and length do not establish equivalent material or performance. Secondary members work with particular connections, laps, supports, and restraint arrangements. Keep the original location and orientation when known, and clearly mark missing history rather than guessing it.
For a US project, begin with the intended use and documents applicable to that site. The building manufacturer, project engineer of record, and contractors may have different scopes. Identify who provides each input and who reviews the interfaces; purchasing a metal building system does not by itself resolve foundations, building services, or occupancy requirements.
References: G500-25: inspection of structural cold-formed steel framing · G501-25: evaluation and remediation of cold-formed steel members and connections
Compare decisions before fabrication release
Prepare an inventory with a unique identifier for each member or traceable group. Record available manufacturer marks, profile geometry, material records, coating condition, and existing holes or field alterations. The responsible professional determines what investigation is needed when identity is uncertain. Do not assign a steel grade from appearance or gauge, or apply an old load table to a different arrangement without review.
Compare alternatives on the same project basis. Record dimensions, revisions, and assumptions explicitly, and distinguish a confirmed requirement from a future possibility. When a decision changes reactions, connections, or geometry, request revised documents before authorizing affected work. A sales note or preliminary drawing should not silently become a field instruction.
References: G500-25: inspection of structural cold-formed steel framing · G501-25: evaluation and remediation of cold-formed steel members and connections
Coordinate the trade interface
Describe the proposed new use, support layout, connections, and restraint to the reviewer. Photograph bends, corrosion, torn holes, cuts, and previous repairs with the member identifier. Those observations support assessment; they do not authorize straightening, welding, or new drilling. Coordinate dismantling and handling separately so the inventory remains traceable and later damage can be distinguished from the condition originally reviewed.
References: G500-25: inspection of structural cold-formed steel framing · G501-25: evaluation and remediation of cold-formed steel members and connections · FAQ of the Month: October 2023, material properties of existing Z-purlins · Metal building system design resources
Prepare a reviewable record
This matrix organizes decisions and evidence; it does not provide design capacities or tolerances. Use the project's units and elevation references, and attach complete documents when a screenshot omits applicable notes. Each review should state its scope, unresolved items, and the person responsible for closing them.
| Condition | Required record | Decision supported |
|---|---|---|
| Member identity | Marks, original location, orientation, and material records | Define known information and gaps |
| Observed condition | Identified photographs and alteration history | Request the appropriate assessment |
| Proposed reuse | New location details and written suitability disposition | Segregate accepted and unresolved members |
References: G500-25: inspection of structural cold-formed steel framing · G501-25: evaluation and remediation of cold-formed steel members and connections · FAQ of the Month: October 2023, material properties of existing Z-purlins · Metal building system design resources
Close open items and transfer the information
Record acceptance against the identified member and its approved destination, including any conditions that must be satisfied before use. A decision for one purlin does not release every similar piece in the yard. Retain rejected and unresolved statuses in the inventory so purchasing or erection staff cannot mistake availability for approval. At installation closeout, reconcile the installed identifiers with the accepted layout and record substitutions or handling damage for follow-up review.
Keep the approved response available to the people performing and inspecting the work. At scope closeout, retain the final revision with its attachments, identified photographs, and resolved items. The following links develop related subjects; manufacturer details and responsible-professional direction remain necessary for the actual project.
- Identify and photograph candidate members before mixing salvaged stock.
- Submit the inventory and proposed new use for professional review.
- Keep accepted, rejected, and unresolved items separately labeled through installation.
- Purlins vs. Girts: Roof and Wall Secondary Framing Explained
- Steel Connection Documentation Checklist
References: G500-25: inspection of structural cold-formed steel framing · G501-25: evaluation and remediation of cold-formed steel members and connections · FAQ of the Month: October 2023, material properties of existing Z-purlins · Metal building system design resources
Common questions
Can the same nominal purlin depth establish interchangeability?
No. Material, section geometry, condition, holes, support arrangement, and restraint may differ and require review.
Does the original building's record approve a salvaged girt for a new wall?
No. It helps identify the member; suitability for the proposed new location still needs a documented assessment.
Sources & further reading
Use the current documentation for the exact product and project. Source links do not imply a partnership or endorsement.
- G500-25: inspection of structural cold-formed steel framing Steel Framing Industry Association / CFSEI
- G501-25: evaluation and remediation of cold-formed steel members and connections Steel Framing Industry Association / CFSEI
- FAQ of the Month: October 2023, material properties of existing Z-purlins Cold-Formed Steel Engineers Institute
- Metal building system design resources Metal Building Manufacturers Association
Prepared with AI assistance. Linked references require current project-specific review. How these guides are prepared.
Prepare a supply inquiry
- Record the project drawing or detail and the specified product, profile, or system.
- List the complete configuration, physical units, quantities, and cuts per piece.
- Request current manufacturer documents; confirm compatibility, price, and availability before ordering.
- Obtain the responsible professional's review for loads, code requirements, or installation.