Scaffold Appreciation

1
Scaffold Appreciation

• Section 4 Other Scaffold Types

2
Birdcage Scaffolds

• Normally used for interior work in large
  buildings to provide access to ceilings, walls or
  soffits
• They have a single working platform

3
Base

• The floor has to carry the full load
• Floors must be examined before scaffolding. If
  there is any doubt it must be shored
• Soleplates are an absolute requirement
• Soleplates must be set at 90 to the joist
  direction to allow weight distribution

4
Standards

• Should be set in rows at not more than 2.5m
  centres
• Joints should be planned to be near ledgers and
  staggered

5
Ledgers

• Should not be more than 2.5m high and
  subsequently at 2m intervals
• Joints should be staggered and made with sleeve
  couplers
• Should be fixed with right angle couplers

6
Transoms

• On all lifts except the top, transoms should be
  horizontally and fixed to standards with right
  angle couplers or putlog couplers
• Spacing not more than 1.5m on working platforms
• At least one transom within 300mm of each
  standard
• Can be jointed in larger scaffolds

7
Bracing

• At least one brace for each six verticals
• May be a single diagonal tube or a zig zag
• Bottom connections must be attached to the
  bottoms of standards by swives or to a foot tie
  with right angle couplers
• Single lift birdcages need bracing as much as
  multi lift due to inherent instability

8
Tying

• When within or against structures best practice
  dictates the birdcage should be tied
• No vertical should be more than 6 tubes away from
  a tie
• 1 tie per 40m2
• Transoms or ledgers should butt the walls

9
Working Platform

• Should be at the top of the scaffold
• Load should not be more than 0.75KN/M2 (light
  duty)
• Should cover the plan area of the scaffold
• Subject to the requirements of other working
  platforms
• Toeboards and guardrails as independent scaffolds
• Access as independent scaffolds

10
Truss Out scaffolds

• Independent tied scaffold used where it is
  impractical to build from the ground
• Dependent upon the structure for support
• The structure must be examined by a competent
  person prior to erection
• Only trained and experienced scaffolders to
  construct
• Only constructed from steel tube and fitting

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Illustration
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Structure
In simple forms of truss out scaffold horizontal
tubes are anchored within buildings and securely
strutted against the wall using rakers These
simple truss outs are designed for light use
only More complex truss outs must be designed and
usually follow the form in the first illustration.
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Cantilever Scaffolds

• Independent tied scaffold erected on beams
  cantilevering out from a building
• The strength of the structure should be
  determined by a competent person prior to
  erection to ensure the scaffold loads can be
  resisted
• Strict control must be exercised by the user on
  the loads imposed on the scaffold
• The load limitation must be clearly stated and
  labelled

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Illustration
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Illustration