Short answer
SPAN 400 frames are not one interchangeable category. Identify the frame form, width context, rung or bracing geometry, spigot direction where documented, exact code, and applicable source drawing before requesting a replacement.
Keep frame forms separate
Base frames, extension frames, ladder frames, guardrail frames, bracing frames, and V-X frame products have distinct catalog pathways. Their names describe different forms and do not establish substitution relationships.
Record geometry without guessing fit
Photograph the complete frame face, top and bottom connections, labels, rungs, braces, and installed orientation. Add dimensions with units and the surrounding SPAN 400 components.
Information checklist
- Exact frame code
- Frame form and width context
- Rung and brace arrangement
- Top and bottom connection details
- Source drawing or manual page
Compare against the verified source
Use the manual landing page and exact component record together. Where source alignment is uncertain, the record remains awaiting verification rather than being published as a confirmed replacement.