Construction site safety

What does Royal Decree 1627/1997 regulate?

Construction involves serious risks (falls from heights, burials, entrapment, falling objects, electrical hazards, machinery accidents) and a complex organizational structure with multiple companies that change throughout the project. Royal Decree 1627/1997 addresses this reality with a prevention model that begins at the project stage, with tiered responsibilities and documentation that accompanies the work from its design to its completion. It applies to the construction and civil engineering works listed in Annex I, including both building and civil engineering projects.

The Royal Decree is integrated with Law 32/2006, which regulates subcontracting in the construction sector, and its implementing regulations (Royal Decree 1109/2007), which limit subcontracting levels, require the Subcontracting Register and the Register of Accredited Companies, and with Royal Decree 39/1997 and Law 31/1995 regarding preventive resources, coordination of activities, and training. The general collective agreement for the construction sector specifies occupational safety training and the Construction Professional Card.

The INSST publishes a technical guide for the assessment and prevention of risks related to construction works that interprets the royal decree and its annex IV of minimum provisions.

Roles and responsibilities

• Promoter. The natural or legal person on whose behalf construction is carried out appoints coordinators where required and commissions the health and safety study or basic study. The execution-phase coordinator approves the plan, or the project management team does so where no coordinator is required; public-administration projects follow Article 7.2. Article 18 prior notice was repealed; contractors submit the opening notification.
• Project designer. Integrates prevention into the project in accordance with the principles of article 15 of Law 31/1995 and article 8 of the royal decree.
• Health and safety coordinator during the project phase. Mandatory when several designers are involved; coordinates the application of preventive principles in the design and prepares or commissions the health and safety study.
• Health and safety coordinator during the execution phase. Mandatory when more than one company is involved, or a company and self-employed workers, or several self-employed workers; coordinates the application of prevention principles, approves the health and safety plan, organizes the coordination of activities, controls access to the work site and adopts the necessary measures, with the powers of article 9.
• Contractor and subcontractors. They apply the principles of preventive action, comply with the health and safety plan, inform and train workers, follow the coordinator’s instructions, and designate preventive resources when required.
• Self-employed workers. They comply with the minimum provisions of Annex IV, the coordination obligations and the health and safety plan, and use compliant equipment.
• Project management. Technicians appointed by the developer for the direction and control of the execution; assumes the functions of the coordinator when their appointment is not mandatory.

Construction-site documentation

• Health and safety study. Mandatory in works with a contract execution budget equal to or greater than 450,759.08 euros, an estimated duration of more than 30 working days with more than 20 simultaneous workers, a labor volume greater than 500 days or in tunnels, galleries, underground conduits and dams; it contains a report, specifications, plans, measurements and budget.
• Basic health and safety study. For construction projects outside the circumstances requiring the full health and safety study, with preventive measures and technical safeguards for the anticipated risks.
• Health and safety plan. For works with a project, each contractor prepares it from the health and safety study or basic study, adapting it to the execution method. Before work starts, the execution-phase coordinator approves it or, where no coordinator is required, the project management team performs that function. For public-administration projects, it is submitted with the relevant report to the awarding administration. Amendments require express approval under Article 7.2.
• Incident logbook. For the purpose of monitoring and tracking the plan; the entries are communicated to the affected contractor and their representatives, and in case of work stoppage or repeated non-compliance, to the Labor Inspectorate.
• Opening notice. Employers acting as contractors submit the opening notification to the labour authority before work starts; it includes the health and safety plan under Article 7 where applicable. This is distinct from the former prior notice, repealed in 2010.
• Subcontracting Book. Required by Law 32/2006 to reflect the subcontracting chain and its limits.

Organizational application: how to manage prevention on construction sites

1. Appoint health and safety coordinators for the phases and circumstances required by Article 3, and document their appointment.
2. For works with a project, prepare the study or basic study addressing actual risks and require each contractor’s specific plan to be approved before work starts. For works without a project, document task risk assessment and preventive planning without automatically calling that document an Article 7 plan.
3. Formalize the coordination of activities: regular meetings, exchange of information, access control and accreditation of companies and people.
4. Verify the subcontracting chain, the Subcontracting Book and the registration in the Register of Accredited Companies.
5. Check the occupational safety training and risk information for each worker, including the self-employed.
6. Plan collective protections (guardrails, nets, scaffolding, shoring) in phases and designate preventive resources in work with special risks.
7. Use the incident logbook, investigate incidents, and update the plan when the construction process changes.

Preventive management software allows you to manage the documentation of the work, the accreditation of companies and workers, inspections by phase and incidents with shared traceability between promoter, coordinator and contractors.

Limits and common mistakes

1. Using generic health and safety studies and plans, copied from other projects, without adapting them to the actual construction process.
2. Starting work without the opening notification or without an approved plan and appointed coordinator where those requirements apply.
3. Consider that the designation of the coordinator exempts the promoter and the contractors from their responsibilities.
4. Tolerating subcontracting beyond permitted levels or with non-accredited companies.
5. Rely on individual equipment for fall protection when collective protection is possible.
6. Do not update the plan in response to changes in phase, auxiliary resources, or participating companies.

The thresholds for the safety and health study, the figures and the obligations must be verified in the consolidated text of Royal Decree 1627/1997 and in the INSST technical guide.

Regulatory framework in Spain

• Royal Decree 1627/1997, of October 24. Minimum safety and health provisions in construction works.
• Law 32/2006, of October 18. Regulation of subcontracting in the construction sector.
• Royal Decree 1109/2007, of August 24. Development of Law 32/2006: Register of Accredited Companies and Subcontracting Book.
• INSST technical guide on construction works . Criteria for the application of Royal Decree 1627/1997.
• Council Directive 92/57/EEC of 24 June 1992. Minimum health and safety requirements for temporary or mobile construction sites.

In Colombia, construction safety is regulated, among others, by Resolution 4272 of 2021 of the Ministry of Labor on work at heights and by the SG-SST of Decree 1072 of 2015.

Climate adaptation across construction phases

An operational plan can map each phase to weather exposure: excavations after rain, work at height in wind, physical effort during heat and icy access routes. Assign who monitors warnings, who can stop a task and what checks allow work to resume. Air temperature alone does not describe total heat load: effort, radiation, clothing and individual conditions also matter. A historical schedule becomes insufficient when site conditions change.

In Spain, the additional provision of Royal Decree 486/1997 also covers construction sites. Orange or red warnings coupled with insufficient protection require conditions, including working hours, to be adapted; the provision sets no universal shutdown temperature. A practical site record can identify the warning, affected task, decision, alternative work and subsequent check. Consulting a weather app without changing an exposure incompatible with safety does not complete preventive action.

Physical workload and continued employment in construction

A musculoskeletal programme should examine specific operations: carrying material across uneven ground, reinforcement work, kneeling, overhead reach and tool use. Avoiding unnecessary handling and redesigning supply, working height and access come before relying solely on lifting training. A mechanical aid must be usable within the available space without introducing new interference with other equipment.

For older workers, adjustments address job demands and individual needs rather than an invented age threshold. Rotation is useful when it changes exposures and allows recovery; moving someone between equally demanding tasks does not demonstrate improvement. Suggested follow-up measures include redesigned tasks, actual use of aids and confidentially reported discomfort. A particular injury should not be attributed to work merely because it occurs alongside a particular occupation.

Refurbishment in occupied commercial premises

In premises open to the public, construction and normal business share access, utilities and potential emergencies. The private construction client, premises operator, contractors and safety coordinator may have different roles; a refurbishment contract does not automatically make them the same legal actor. Application of Spanish Royal Decree 171/2004 to construction should be read with its first additional provision and Royal Decree 1627/1997.

A useful coordination arrangement agrees site boundaries, routes for customers and staff, deliveries, service interruptions and evacuation changes for each phase. An identifiable person should communicate changes before incompatible activities begin. Approving a subcontractor’s documents does not establish that these interfaces are controlled. Decisions require checks of actual conditions, including when work is concentrated outside business opening hours.

Archaeology and heritage conservation within a project

Subcontracted archaeological survey work may coincide with mechanical excavation, earth transport or moving plant. Planning should recognise people working at different levels and possible changes in ground stability. A suggested organisational approach defines intervention zones and sequences, how discoveries are reported and who reviews changes before concurrent work resumes.

For a historic monument, material conservation and access constraints influence solutions but do not justify reducing protection. An old component should not be presumed structurally sound, nor an installation considered safe from appearance alone. Restoration, cleaning, scaffolding and maintenance are coordinated according to their actual risks. An unassessed hazard triggers the appropriate technical review, without improvising structural solutions or hazardous-material removal.

Shared welfare facilities as the site changes

Annex IV of Spanish Royal Decree 1627/1997 addresses sanitary facilities and other site welfare conditions. An operational sharing arrangement should identify who supplies, cleans, maintains and replenishes them, how failures are reported and how capacity changes as staffing increases. Sharing facilities does not remove each employer’s preventive duties towards its workers.

Check facilities in use: distance and access from work areas, available drinking water, privacy, appropriate washing and rest arrangements, and separation of contaminated clothing where needed. A suggested inspection record identifies the deficiency, safe interim arrangement, owner and verified closure. Counting sanitary units on a drawing does not establish that they are accessible, clean and available throughout every shift.