Two workers at the new Forth crossing have been suspended after climbing 350ft (107m) down the outside of a tower when their lift broke.
The Alimak lift on the central tower broke down with seven workers inside on Thursday at about 2pm.
Two men reportedly proceeded to exit the lift and climb down the tower.
The remaining five were rescued two hours later.
An investigation being led by contractor FCBC is under way.
The men had been descending early due to high winds but the Alimak is allowed to operate in wind speeds of up to 44mph.
A Transport Scotland spokesman said: “Staff were working in safe conditions inside the jump form at the top of Queensferry Crossing’s centre tower. As wind speeds picked up they elected to descend the tower via the Alimak, rather than using the safer option of the internal tower staircase.
“Safety procedures are in place to rescue employees from the Alimak in all conditions, these were immediately instigated.
"The rescue team successfully carried out the practised rescue drill taking the necessary actions to free the controlled descent mechanism, which allowed those on board to return down the tower safely.
“The Alimak operational and safety record on this job has been exemplary and at no stage during the incident were the personnel inside the hoist in any danger.
"The Alimak hoists are fully compliant with UK LOLER (Lifting Operations and Lifting Equipment) regulations and routine checks are carried out daily and weekly. In addition the hoists are subject to six monthly maintenance by Alimak trained personnel.”
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