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Bettesworth Construction
Construction Safety

How to Make an Evacuation Plan for a Building Under Construction

A construction-site evacuation plan must match the site’s current layout and hazards. Set usable routes, clear alarms, assembly and headcount procedures, assigned duties, and a process for updating and training workers.

By Bettesworth Construction Team 6 min read
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Make the evacuation plan fit the jobsite as it exists today—not the finished building. A usable construction-site plan identifies how to raise an alarm, which routes workers should take, where they assemble, how the crew is accounted for, who has each emergency duty, and when nobody may re-enter. Update it and brief workers whenever site changes affect those arrangements.

What should an emergency action plan include on a construction site?

For U.S. construction employers, OSHA’s construction emergency action plan (EAP) standard, 29 CFR 1926.35, identifies these elements:

  • Escape procedures and assigned escape routes.
  • Procedures for workers who must remain briefly to operate critical operations before evacuating.
  • How the employer will account for employees after evacuation.
  • Rescue and medical duties assigned to employees designated to perform them.
  • The preferred way to report fires and other emergencies.
  • The names or job titles of people workers can contact for an explanation of the plan.
  • An employee alarm system and the types of evacuation to use in different emergency circumstances.

Designated employees must be trained to assist with safe and orderly evacuation before the plan is implemented. The standard also requires the employer to review the plan with each employee when the plan is developed or the employee is assigned to the job, when responsibilities change, and when the plan changes.

The rule applies to emergency action plans required by an OSHA standard. It allows an employer with 10 or fewer employees to communicate the plan orally rather than maintain a written plan. A written, current map and plan are still practical on a changing site, especially when multiple employers or crews need to coordinate. Check which requirements apply to the employer and operation.

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How do I make an evacuation plan for a building under construction?

1. Assess the hazards and the current phase of work

Walk the active work areas and note where people are working, usable exits and stairs, temporary barriers, work-at-height access, hazardous materials, hot work, temporary power, combustible materials, and areas responders need to reach. Consider hazards both inside and outside the site. OSHA’s construction-site emergency guidance emphasizes accounting for hazards, worksite layout, structural features, and emergency systems.

Do not rely on a finished-building floor plan if it does not show today’s access, barriers, or hazards. The route that works during one phase may be blocked or unsafe in another.

2. Map routes, exits, assembly areas, and responder access

Draw a current site map that identifies occupied work areas, usable escape routes, an alternate route if the primary one is blocked, where each route discharges outdoors, assembly areas, emergency-vehicle access, and significant hazards or restricted areas. Name the plan owner and mark the revision date or construction phase. A posted map helps only while it matches the actual site.

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For occupied buildings and structures, 29 CFR 1926.34 requires egress to remain free and unobstructed, with exits visibly marked. Mark access routes too when they are not immediately visible. Coordinate route changes before work blocks or alters an exit; never let materials, equipment, or temporary work obstruct egress.

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When choosing among feasible routes, compare whether each is accessible, avoids the relevant hazard, can remain clear as work progresses, leads to a safe assembly area, and stays out of the way of emergency responders.

3. Choose alarms and emergency reporting methods that work on site

Specify how a worker reports an emergency, how the alarm is raised, what each signal means, and how the alert reaches people in noisy or separated work areas. OSHA lists air horns, vehicle horns, phones, radios, verbal communication, and hand signals as possible construction-site methods. The regulation requires an employee alarm system; if one alarm signal is used for multiple purposes, the signals must be distinctive.

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Choose methods workers can perceive and understand under actual site conditions. Consider noise, visibility, separated floors and work zones, power or cell-service outages, and whether contractors and all shifts use the signals consistently. OSHA does not rank the methods, so check them in a site-specific trial or drill and train workers on what to do when they hear or receive each alert.

4. Assign emergency roles by job title or role

State who activates the alarm, leads evacuation, calls emergency services, maintains the worker and visitor roster, takes the headcount, reports missing people, and coordinates with responders. Identify any critical shutdown, rescue, or medical duties. Assign those tasks only to people trained to perform them; do not make a general evacuation plan depend on an untrained worker entering a hazardous area.

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OSHA’s construction guidance says one warden for every 20 workers will generally be adequate. This is guidance, not a universal construction-site staffing rule; the site’s layout, hazards, and workforce affect how many people are needed to support evacuation and accountability.

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5. Set assembly, accountability, and re-entry rules

Choose an assembly area with room for the workforce and away from emergency-vehicle routes. Assign a lead to compare the headcount with current employee, contractor, and visitor records. Decide who will give responders the names and last known locations of anyone missing, and where workers should wait for instructions.

Make clear that workers must not re-enter until the site has been confirmed safe. Identify who communicates that decision and releases workers from the assembly area.

6. Coordinate with other employers and train the workforce

Review the plan with employees when it is introduced, when their emergency duties change, and whenever the plan changes. Review relevant plan information with each worker at initial assignment. Coordinate with contractors and other employers sharing the site so alarms, routes, assembly areas, and accountability procedures do not conflict. OSHA recommends training and drilling workers, contractors, and volunteers on emergency communication methods.

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7. Revise the plan when site conditions change

Set a regular review and update the plan when a change affects evacuation or emergency response. Triggers may include a new floor or access point, changed stairs or scaffolds, demolition, a moved work zone, altered alarm coverage, a new hazard, or changed responder access. Re-brief affected workers and replace outdated posted maps. These are practical update triggers; OSHA’s guidance calls for modifying the plan as worksite conditions change but does not prescribe this specific checklist.

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Keep fire protection and local code requirements in view

An evacuation plan is one part of construction safety, not a substitute for fire prevention or protection. 29 CFR 1926.24 requires an effective fire-protection and prevention program throughout construction, repair, alteration, and demolition, including equipment specified by Subpart F. Under 29 CFR 1926.150, one example is a requirement for a fire extinguisher rated at least 2A per 3,000 square feet of protected building area or major fraction, with a 100-foot maximum travel distance. The regulation contains additional conditions and alternatives; that example is not a complete site fire plan.

State and local fire and building codes may add obligations. Which provisions apply depends on the project’s jurisdiction, construction phase, use, and other details. OSHA’s general-industry evacuation eTool discusses exit-route design under 29 CFR 1910.36, including route numbers and dimensions, but those provisions should not automatically be treated as construction requirements; verify applicability before relying on them for a construction project.

Plan review checklist

  • Does the map show current work areas, exits, routes, assembly areas, hazards, and emergency-vehicle access?
  • Can every worker receive and understand the alarm in their work area, including noisy or separated zones?
  • Are evacuation types and assigned routes clear?
  • Does each emergency duty have an assigned, appropriately trained person?
  • Can the headcount include employees, contractors, and visitors, and can responders be told where anyone missing was last seen?
  • Are exits and egress paths clear, visibly marked, and kept that way as work proceeds?
  • Do contractors and other employers understand the signals and procedures?
  • Does the revision date or phase match current site conditions, and have affected workers been briefed on changes?

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