{"id":"escalator","version":"0.4.0","classification":{"uniformat":"D1020"},"names":["Escalator"],"service_life":{"median_years":35,"range_years":[20,50],"range_basis":"source_spread"},"pm_tasks":[{"task":"Perform escalator periodic inspections and tests","frequency":"P1Y","reference":"NAVFAC MO-118 Inspection of Vertical Transportation Equipment","url":"https://nibs-s3-wbdg3-production.s3.us-east-1.amazonaws.com/NAVFAC/OPER/mo118.pdf","page":185,"checklist":"7.3 Periodic Inspection and Tests (escalators)"}],"basis":[{"type":"public_document","life_type":"planning","title":"CNA e-Tool Estimated Useful Life Table","by":"U.S. Department of Housing and Urban Development","url":"https://www.hud.gov/sites/documents/eul_for_cna_e_tool.pdf","page":14,"code":"HUD CNA 3.5.1.10","label":"Escalators","years":50,"note":"Same life for family and elderly properties. US multifamily housing."},{"type":"public_document","life_type":"accounting","title":"General depreciation rates (IR265), July 2021","by":"Inland Revenue (Te Tari Taake), New Zealand","url":"https://www.ird.govt.nz/-/media/project/ir/home/documents/forms-and-guides/ir200---ir299/ir265/ir265-2021.pdf","page":43,"code":"BDFO","label":"Escalators","years":20,"note":"Printed page 43. BDFO Building fit-out (when in books separately from building cost). Printed DV 10%, SL 7%. Tax depreciation lives set by the Commissioner of Inland Revenue for New Zealand income tax, not engineering or asset-management lives; they are banded and often short (e.g. reticulation piping 25 years). The July 2021 edition was the newest PDF reachable; the online Depreciation Rate Finder may hold later determinations."}],"confidence":{"grade":"C","sample_size":null},"open_questions":["Only one source so far, HUD's 50 years for escalators. HUD's single row does not separate the truss, which can last that long, from drives, steps, handrails and controls, which usually need major work much sooner. A second openly licensed source is needed before relying on 50 years.","Every source here is a published planning, design or accounting life. None is observed replacement data.","Elevator tasks come from NAVFAC MO-118 (1988), which restates the elevator code tests of its time; check them against the current ASME A17.1 and local requirements."],"contributors":["unfinished.one editors"],"last_reviewed":"2026-10-22","canonical_url":"https://unfinished.one/c/escalator","versioned_url":"https://unfinished.one/c/escalator/v/0.4.0","licence":"CC-BY-4.0","citation":"unfinished.one (2026). Escalator, v0.4.0. https://unfinished.one/c/escalator/v/0.4.0"}