When NR-35 applies
The standard applies to activities with a difference in level greater than two metres above the lower level where a fall risk exists. This threshold defines its Brazilian scope; it does not mean falls from lower heights are harmless or excluded from general prevention. The work at height entry introduces the hazard. NR-35 specifies how responsibilities, assessment and authorisation are organised within Brazil’s occupational framework rather than establishing a universal international height threshold.
Planning comes before equipment
The standard’s hierarchy starts by avoiding work at height where an alternative exists. If it cannot be avoided, measures to eliminate the fall risk are considered before measures that minimise consequences. Issuing a harness does not complete this assessment. Analysis should consider the task, surroundings, external influences, supervision and conditions preventing safe execution, as well as selected protection. These decisions should reflect the actual location rather than the availability of familiar equipment alone.
Training, fitness and authorisation
Workers need formal organisational authorisation linked to activities, training and clinical fitness. Attendance at a course does not automatically authorise every intervention. The organisation must be able to identify the scope of each person’s authorisation. The text and amendments regulate training and specific conditions; when arranging courses or adapting equipment, current transitional provisions must also be checked, particularly those concerning individual-use ladders. A previous certificate should not replace this review of the intended activities.
Procedure and permit are different
The standard requires risk analysis and procedures for routine activities; a work permit is needed where applicable. Copying a generic permit without examining the location may omit obstacles, simultaneous activities or weather. When an unforeseen risk condition cannot immediately be eliminated or neutralised, work must be suspended in accordance with the standard. Safety information needs to be accessible to the team rather than held only in a central administrative file.
Example of a pre-work review
For a roof intervention, compare alternatives from a safe position, access, protection, authorised people and emergency response. Rescue must be planned with suitable resources and personnel, rather than improvised after a fall. This entry does not prescribe anchorage designs, fall-clearance distances or manoeuvres. System design, selection and inspection require technical competence, manufacturer instructions and assessment of the particular task and location.
