Evidence hierarchy
- Applicable law, authorities and official codes.
- Consensus standards and code-referenced design documents.
- Government laboratory and research-institute technical references.
- Industry technical material and project-specific manufacturer documentation.
Editorial rules
We link sources near technical claims, identify regional variation, do not invent tests, certificates, experts, case studies or structural values, and retain edition/date context when documents change.
Update policy
Content is reviewed against source editions, errata and adoption changes. Pages are not an adoption-status database; always confirm with the local authority.