Page 68 - Safety and health in construction
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Safety and health in construction
10.1.12. If the air pressure exceeds 1 bar, the medical examination of the worker
should have been carried out within the four weeks preceding his employment.
10.1.13. Workers who have been employed continuously in compressed air at a
pressure less than 1 bar should be medically re-examined every two months; if the
pressure is higher, the period between re-examinations should be shorter.
10.1.14. Workers who have been absent from work in compressed air for any
period due to illness or for ten days or more for reasons other than illness should be
medically re-examined. Such workers should be reintroduced into compressed-air work
in a graduated manner.
10.1.15. For every project where workers are employed in compressed air, a
physician or a nurse or a trained first-aid attendant familiar with compressed-air work
should be available at all times.
10.1.16. When persons are employed in compressed air at a pressure exceeding 1
bar the employer should inform a neighbouring hospital of the position of the worksite
and of the name and address of the physician exercising medical supervision.
10.1.17. Every person employed in compressed air at a pressure exceeding 1 bar
should be provided with an identification badge to be worn on the body indicating that
he has been employed in compressed air and giving the address of the medical lock at
his place of employment.
10.1.18. The identification badge should state that the wearer should be taken to
the medical lock and not to a hospital if he is ill.
10.1.19. Adequate and suitable facilities for remaining on the site after
decompression, including shelters with seats should be provided for workers working in
compressed air.
10.1.20. Any person not previously employed in compressed air should not be
subject to compressed air unless accompanied in the man lock by a person competent to
advise him as to the appropriate conduct of persons during compression.
10.1.21. During compression the pressure should not be raised to more than about
0.25 bar until the lock attendant has ascertained that no person is complaining of
discomfort, and thereafter it should be raised at a rate not exceeding about 0.5 bar per
minute.
10.1.22. If during compression any person is suffering from discomfort,
compression should stop and the pressure be gradually reduced.
10.2. Work in cofferdams and caissons
10.2.1. When necessary to prevent danger, caissons and shafts should:
(a) be adequately braced;
(b) be firmly secured in position.
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