Scaffolding consists of a temporary high platform to support
equipment and employees while working at height. In most cases, the scaffolding
can be equipped with guardrails on any side where the employee is exposed to a
fall in height. See aluminum scaffold plank.
There are different types of scaffolding:
Scaffolding -
Scaffolding on a support formed by a platform supported by fasteners attached
to a building or load-bearing walls
Scaffolding
of metal - Scaffolding with trestles - Scaffolding on support formed by
a platform supported by trestles (carpenter's easels). Metal trestle
scaffolding is also known as scaffolding.
Trestle
scaffolding
Scaffolding on Ladder - A scaffolding on a support consisting
of a platform resting on fasteners attached to ladders.
Ladder
scaffolding
Pumping Easels - A scaffolding on a platform support
supported by vertical posts and movable support straps.
Pumping
easels
Scaffolding -
Scaffolding on portable support mounted on wheels or wheels.
Frame
scaffolding
Tube and
Flange Systems - Consists of steel or aluminum tubing of various lengths
connected by rigid flanges where vertical and horizontal elements intersect,
and by pivoting flanges where diagonal elements are used.
Tube and
flange systems
The hazards associated with scaffolding are:
· Access
· Collapse
· Failure of guardrails, boards and platforms
· Power lines
· falls
· Falling objects / items
· Instability
Proper pre-planning and appropriate measures help ensure that
the scaffolding is safely erected and well used. This includes :
When using manufactured scaffolding ensure that it is
assembled, operated, maintained and disassembled in accordance with the
manufacturer's specifications.
If a scaffold is more than 3 m high or if it is a rolling
scaffold, install a guardrail system along all free sides and at the ends of
the platforms.
Provide safe means of access to platforms.
When using metal scaffolding, access must be provided from
ground level. If the scaffolding is less than 6 m in height, provide a
staircase or ladder with continuous access. If it is 6 m high or more, provide
a continuous access staircase.
Make sure no one climbs the spacers to access the
scaffolding.
It is important to know how to recognize faults in boards.
Here are the common faults of scaffold planks:
Gerces - Cracks or separations along the board that cross the
growth rings. Such cracks or crevices must not be less than three inches from
the edge of the board. Boards with slots wider than 3/8 "(10 mm) must be
removed and not used.
Slots - Separations along the board in the direction of the
thread, most of which is located between the growth rings.
Flach - Bark or lack of wood on the edge of a board.
Nodes - They must be strong, tight and well spaced. On the
wide face of a 2 "x 10" board, their size should not exceed 50mm or 1
7/8 ". For 2 "x 12" boards, the maximum knot size is 60 mm or 2
3/8 ". Edges should not contain knots larger than 10mm or 3/8 "in the
middle third of the board. Planks with flat knots should be rejected.
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