{"id":"exit-sign","version":"0.3.0","classification":{"uniformat":"D5090"},"names":["Exit sign"],"aliases":["exit light","running man sign"],"service_life":{"median_years":10,"range_years":[5,25],"range_basis":"source_spread"},"pm_tasks":[{"task":"Inspect exit sign condition and mounting","frequency":"P1Y","reference":"UFC 3-601-02 Fire Protection Systems Inspection, Testing, and Maintenance (7 October 2021, with Change 1, 18 April 2025)","url":"https://www.wbdg.org/FFC/DOD/UFC/ufc_3_601_02_2021_c1.pdf","page":86,"checklist":"Table 2-28 Egress Marking System ITM Tasks"},{"task":"Check exit sign lamp or light source works","frequency":"P1Y","reference":"UFC 3-601-02 Fire Protection Systems Inspection, Testing, and Maintenance (7 October 2021, with Change 1, 18 April 2025)","url":"https://www.wbdg.org/FFC/DOD/UFC/ufc_3_601_02_2021_c1.pdf","page":86,"checklist":"Table 2-28 Egress Marking System ITM Tasks"},{"task":"Run battery-backed exit signs on battery for 90 minutes","frequency":"P1Y","reference":"UFC 3-601-02 Fire Protection Systems Inspection, Testing, and Maintenance (7 October 2021, with Change 1, 18 April 2025)","url":"https://www.wbdg.org/FFC/DOD/UFC/ufc_3_601_02_2021_c1.pdf","page":86,"checklist":"Table 2-28 Egress Marking System ITM Tasks"}],"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":15,"code":"HUD CNA 3.6.2.6","label":"Emergency lights, illuminated signs","years":[5,10],"note":"Family properties 5 years, elderly 10. US multifamily housing. HUD gives emergency lights and illuminated signs one row."},{"type":"public_document","life_type":"planning","title":"UFM 3-601-02 Fire Protection Systems Inspection, Testing, and Maintenance (Unified Facilities Manual, 13 March 2026)","by":"U.S. Department of Defense (Unified Facilities Criteria program)","url":"https://www.wbdg.org/FFC/DOD/UFC/ufm_3_601_02_2026.pdf","page":83,"code":"Figure 2-3 note 1","label":"\"LED egress marking devices without battery backup are considered to have a 25-year service life. (Consult the manufacturer's technical materials for specific guidance.)\"","years":25,"note":"Printed page 76. LED exit signs (egress marking devices) without battery backup, i.e. powered from an emergency/generator circuit. Battery-backed units need battery or unitized-fixture replacement every 5 to 10 years per manufacturer guidance (p.83, not transcribed as a life), so this value does not describe battery-backed signs."}],"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/exit-sign","versioned_url":"https://unfinished.one/c/exit-sign/v/0.3.0","licence":"CC-BY-4.0","citation":"unfinished.one (2026). Exit sign, v0.3.0. https://unfinished.one/c/exit-sign/v/0.3.0"}