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ABB222 Lecture 2 - Coggle Diagram

- - - - Highway tip truck to remove soil
      - Plate compactor for bottom compaction
      - Loader to tidy up soil heap of dump site
      - Standby pump in case of rain
    - - Water - if available use mains supply (hose) otherwise water truck
      - Plate compactors
      - Plate compactor mounted on excavator
  - - - collect records of actual performance (ask! watch!)
      - build database
      - record assumptions
  - - - Detailed excavation & trimming
      - Productivity: 3-5 m3/hr
    - - detailed excavation & trenching
      - Productivity
        
        Front bucket: 10-15 m3/hr
        
        Reader Exc: 3-5m3/hr
    - - detailed excavation in confined spaces
      - less damage to subgrade and low clearance
      - Productivity: 3-5m3/hr
    - - carting material long distance at high speed on roads
      - Payload
        
        8m3
        
        18T
- - - - Trade "Custom & Practice" in defining the size
      - Packaging
      - Loss/breakage
        
        overbreak/underbreak (excavation)
      - Mistakes
      - Quality of materials
      - Supervision
      - Joints, laps & connections
      - Transportation, off-loading & storage
  - - - Prepare materials lists
      - Take off quantities
      - Understand & spec the quality
      - Cover the "added extras"
        
        freight, packing, spares, consumables
      - Set commercial terms: payments, warranty
      - Request quotations from suppliers
      - Chase them up
      - Normalise quotes: add missing elements
      - Evaluate quotes, select winner
      - Incorporate winning price into estimate
      - Consider materials in context of construction method: damage risk? Carry forward to contingency
      - Delivery time to be captured in tender program
  - - - Access roads, haul roads, hard stands
      - water for dust prevention
      - Safety devices: barriers, bunting, traffic management
      - Survey materials: pegs, string lines
    - - Formwork & consumables
      - Scaffolds
      - Safety
    - - Traffic diversions
      - Traffic management
    - - Trench shoring
    - - Temporary access structure
      - Purpose built lifting equipment
    - - Identify the need since these materials will not be billed nor specified
      - Determine the likely frequency or reuse of these materials
      - Estimate cost
        
        Supply
        
        Place
        
        Repair and maintain
        
        Rehabilitate
      - Materials
        
        hire (internal or external)
      - Purchase and write off on project
      - Purchase and add to company inventory, charge hire to project