Page 88 - Safety and health in construction

Safety and health in construction

14.3.2. Openings through which material is dropped should be adequately fenced
or barricaded to prevent danger.

14.3.3. All work above each tier of floor beams should be completed before the
safety of the tier supports is impaired.

14.4. Demolition of structural steelwork

14.4.1. All practicable precautions should be taken to prevent danger from any
sudden twist, spring or collapse of steelwork, ironwork or reinforced concrete when it
is cut or released.

14.4.2. Steel construction should be demolished tier by tier.

14.4.3. Structural steel parts should be lowered and not dropped from a height.

14.5. Demolition of tall chimneys

14.5.1. Tall chimneys should not be demolished by blasting or overturning unless
a protected area of adequate dimensions can be established in which the chimney can
fall safely.

14.5.2. Tall chimneys should only be demolished by competent persons under
constant competent supervision.

14.5.3. Workers should not stand on top of the chimney wall.

14.5.4. Material thrown down should only be removed during breaks in the work
or under controlled conditions.

14.6. Use and removal of asbestos and materials and
articles containing asbestos

14.6.1. Use and removal of asbestos-containing materials and articles such as
asbestos cement sheets or asbestos insulation present particular health problems as they
often involve dismantling or breaking large quantities of friable materials. The work
should be performed in accordance with the relevant provisions of the ILO code of
practice on Safety in the use of asbestos, in particular the provisions of Chapter 18 on
construction, demolition and alteration work.

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