{"id":"bridge-steel","version":"0.1.0","classification":{"uniformat":"G2010"},"names":["Bridge, steel"],"aliases":["steel bridge"],"service_life":{"median_years":50,"range_years":[50,50],"range_basis":"source_spread"},"pm_tasks":[{"task":"Water-flush decks, drains, bearings, joints, seats and rails (spring)","frequency":"P1Y","reference":"UFC 3-310-08 Non-Expeditionary Bridge Inspection, Maintenance, and Repair","url":"https://www.wbdg.org/FFC/DOD/UFC/ufc_3_310_08_2018.pdf","page":45,"checklist":"8-2 Industry Practice (bridge maintenance)"},{"task":"Routine bridge inspection (NBIS)","frequency":"P2Y","reference":"UFC 3-310-08 Non-Expeditionary Bridge Inspection, Maintenance, and Repair","url":"https://www.wbdg.org/FFC/DOD/UFC/ufc_3_310_08_2018.pdf","page":19,"checklist":"3-2.2.1.2 Routine Inspection"}],"basis":[{"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":45,"code":"BUIL","label":"Bridges (other than block, brick, concrete and stone)","years":50,"note":"Printed page 45. Covers steel and timber bridges. Buildings and structures category. Printed DV 4%, SL 3%. 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":["Every source here is a published planning, design or accounting life. None is observed replacement data."],"contributors":["unfinished.one editors"],"last_reviewed":"2026-10-22","canonical_url":"https://unfinished.one/c/bridge-steel","versioned_url":"https://unfinished.one/c/bridge-steel/v/0.1.0","licence":"CC-BY-4.0","citation":"unfinished.one (2026). Bridge, steel, v0.1.0. https://unfinished.one/c/bridge-steel/v/0.1.0"}