SOP-WAH-003 Revision B - Working at height and rescue

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This standard operating procedure defines working-at-height and rescue requirements for turbine climbing, nacelle and hub work, dropped-object controls, weather limits, rescue equipment, rescue response, training, and revision history. It applies to WTG-01 through WTG-12 and is effective from 2026-04-07.

Key facts

• SOP-WAH-003 is Revision B and is effective 2026-04-07.¹
• The document owner is Greta Vollan, HSE Coordinator, and it was approved by Maren Ellingsby, Site Manager.²³
• The purpose is to prevent falls of people and objects during work in towers and nacelles and to ensure a casualty can be rescued quickly.⁴
• The scope covers all climbing, work in the nacelle and hub, and rescue on WTG-01 to WTG-12.⁵
• The O&M Supervisor plans work at height and checks the weather limits.⁶
• Each technician must check his or her harness and lanyards before use.⁷
• The HSE Coordinator organises rescue drills twice a year.⁸
• Tool tethering is mandatory above 2 m.⁹
• Hatches must stay closed while tools or parts are passed.⁹
• During nacelle work, an exclusion zone with signage is set up at the tower base and nobody enters it without the nacelle team's agreement.⁹
• Climbing requires a minimum of two persons, with only one ladder section climbed at a time.¹⁰
• Climbers must use the fall arrest rail and rest platforms, and use the service lift when available.¹¹
• Any damaged ladder rung or fall arrest component must be reported immediately.¹²
• Climbing and nacelle work are limited to 10-minute mean wind speed up to 15 m/s.¹³
• Hub entry is limited to 10-minute mean wind speed up to 12 m/s.¹⁴
• Work on the nacelle roof is limited to 10-minute mean wind speed up to 10 m/s.¹⁵
• Climbing is not allowed during a thunderstorm when lightning is detected within 15 km.¹⁶
• For ice, there is no access within 300 m of a turbine with ice detected under alarm A7001.¹⁷
• Each nacelle has a sealed rescue kit with a descent device.¹⁸
• Rescue kits are inspected every 6 months, and the seal is checked on the daily checklist.¹⁸
• A broken rescue kit seal means the kit must be inspected before the next climb.¹⁸
• The rescue procedure begins by raising the alarm to the control room and emergency services.¹⁹
• The turbine is then made safe by stopping it and applying the rotor lock.²⁰
• The casualty is attached to the descent device and lowered to the ground or through the tower.²¹
• The target is to have the casualty on the ground within 15 minutes of the alarm.²²
• Working at height and rescue training is refreshed every 2 years, and rescue drills take place twice a year on site.²³
• Revision B added mandatory tool tethering above 2 m after near miss INC-2026-003 and the requirement to close hatches when passing tools.²⁴

Contents

Document control

SOP-WAH-003 is a standard operating procedure for working at height and rescue, Revision B, effective 2026-04-07.²⁵²⁶

The metadata identifies Greta Vollan, HSE Coordinator, as owner and Maren Ellingsby, Site Manager, as approver.²³

Table t01 · table 1, rows 1–6

Row	Field	Value
2	Document number	SOP-WAH-003
3	Revision	B
4	Effective date	2026-04-07
5	Owner	Greta Vollan, HSE Coordinator
6	Approved by	Maren Ellingsby, Site Manager

Agents can query this table as t01 with the query_table tool.

Purpose

The procedure aims to prevent falls of people and objects during work in towers and nacelles and to make sure that a casualty can be rescued quickly.²⁷

Scope

The procedure applies to all climbing, nacelle and hub work, and rescue on WTG-01 to WTG-12.²⁸

Responsibilities

• The O&M Supervisor plans work at height and checks weather limits.²⁹
• Each technician checks his or her own harness and lanyards before use.³⁰
• The HSE Coordinator organises rescue drills twice a year.³¹

Dropped objects and exclusion zones

Tool tethering is mandatory above 2 m.³² Hatches stay closed while tools or parts are passed.³² During nacelle work, an exclusion zone with signage is set up at the tower base, and nobody enters it without the nacelle team's agreement.³²

Climbing

• Climbing requires at least two persons, and teams climb one ladder section at a time.³³
• Climbers use the fall arrest rail and rest platforms, and use the service lift when it is available.³⁴
• Any damaged ladder rung or fall arrest component is reported immediately.³⁵

Weather limits

Weather limits are specified for climbing and nacelle work, hub entry, work on the nacelle roof, thunderstorms, and ice conditions.^1314151617

Table t02 · table 2, rows 1–6

Row	Activity	Limit
2	Climbing and nacelle work	10-minute mean wind speed up to 15 m/s
3	Hub entry	10-minute mean wind speed up to 12 m/s
4	Work on the nacelle roof	10-minute mean wind speed up to 10 m/s
5	Thunderstorm	no climbing when lightning is detected within 15 km
6	Ice	no access within 300 m of a turbine with ice detected (A7001)

Agents can query this table as t02 with the query_table tool.

Rescue equipment and inspection

Each nacelle holds a sealed rescue kit with a descent device.³⁶ The kits are inspected every 6 months, and the seal is checked on the daily checklist.³⁶ A broken seal means the kit must be inspected before the next climb.³⁶

Rescue procedure

• Raise the alarm to the control room and emergency services.³⁷
• Make the turbine safe by stopping it and applying the rotor lock.³⁸
• Attach the casualty to the descent device and lower him or her to the ground or through the tower.³⁹
• The target is casualty on the ground within 15 minutes of the alarm.⁴⁰

Training

Working at height and rescue training is refreshed every 2 years, and rescue drills take place twice a year on site.⁴¹

Revision history

Revision A was the first issue.⁴² Revision B recorded mandatory tool tethering above 2 m after near miss INC-2026-003 and closed hatches when passing tools.²⁴

Table t03 · table 3, rows 1–3

Row	Revision	Date	Change
2	A	2019-10-01	First issue.
3	B	2026-04-07	Tool tethering mandatory above 2 m after near miss INC-2026-003; hatches closed when passing tools.

Agents can query this table as t03 with the query_table tool.

Figures

No figures were extracted from this document.

Related

• Assets: WTG-01, WTG-02, WTG-03, WTG-04, WTG-05, WTG-06, WTG-07, WTG-08, WTG-09, WTG-10, WTG-11, WTG-12
• Components: rescue kit, service lift
• Alarm code: A7001 Ice detected on rotor blades
• Procedure: SOP-WAH-003 Working at height and rescue
• Topics: Cold-climate operation and icing, Safety, isolation and work at height, Training, site rules and acronyms

Sources

Footnotes

1. SOP-WAH-003 Revision B - Working at height and rescue — ¶ 2 · ✓ quote verified ↩

2. SOP-WAH-003 Revision B - Working at height and rescue — table 1, row 5 · table ↩ ↩²

3. SOP-WAH-003 Revision B - Working at height and rescue — table 1, row 6 · table ↩ ↩²

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13. SOP-WAH-003 Revision B - Working at height and rescue — table 2, row 2 · table ↩ ↩²

14. SOP-WAH-003 Revision B - Working at height and rescue — table 2, row 3 · table ↩ ↩²

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17. SOP-WAH-003 Revision B - Working at height and rescue — table 2, row 6 · table ↩ ↩²

18. SOP-WAH-003 Revision B - Working at height and rescue — ¶ 19 · ✓ quote verified ↩ ↩² ↩³

19. SOP-WAH-003 Revision B - Working at height and rescue — ¶ 21 · ✓ quote verified ↩

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23. SOP-WAH-003 Revision B - Working at height and rescue — ¶ 26 · ✓ quote verified ↩

24. SOP-WAH-003 Revision B - Working at height and rescue — table 3, row 3 · table ↩ ↩²

25. SOP-WAH-003 Revision B - Working at height and rescue — ¶ 1 · paraphrase ↩

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32. SOP-WAH-003 Revision B - Working at height and rescue — ¶ 12 · paraphrase ↩ ↩² ↩³

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36. SOP-WAH-003 Revision B - Working at height and rescue — ¶ 19 · paraphrase ↩ ↩² ↩³

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40. SOP-WAH-003 Revision B - Working at height and rescue — ¶ 24 · paraphrase ↩

41. SOP-WAH-003 Revision B - Working at height and rescue — ¶ 26 · paraphrase ↩

42. SOP-WAH-003 Revision B - Working at height and rescue — table 3, row 2 · table ↩

Provenance badges✓ quote verified the quoted words were found verbatim in the source textparaphrase reworded from the source text; numbers checked, no verbatim quotetable values parsed deterministically from the cited table rows