Sources
We prefer manufacturer specifications, recognized standards, government accessibility resources, and direct measurement guidance. Secondary sources are used to identify questions and cross-check common practice, not to overwrite primary data.
Calculations
Room examples state their assumptions. Nominal mattress dimensions are kept separate from estimated or user-entered frame footprints. Clearance is measured from the installed object to the nearest boundary or obstacle.
Review and corrections
New reference pages are checked for dimensional consistency, unit conversion, arithmetic, internal links, and wording that could imply a guarantee. Material corrections are made promptly when reliable evidence is supplied.
Commercial independence
Advertising and future affiliate relationships do not determine calculator results. Sponsored or affiliate material will be disclosed and kept visually distinct from editorial guidance.