SURVEYING FOR BUILDERS

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SURVEYING FOR BUILDERS

• Peter Southwell
• Probuild Constructions (Aust) Pty Ltd
• Wednesday 28 July 2004

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overview

• Introduction terminology
• Why surveying is required
• Overview of types of survey
• Outputs from surveys
• Construction surveying methods
• Summary

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key issues

• Why surveys are required
• What type of surveys are undertaken
• How surveys are carried out

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introduction terms

• Note key differences between
• Land surveying
• Strata title and lettable area surveys
• Feature surveys
• Setting out and construction surveying

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introduction why survey?

• COMPLIANCE WITH DESIGN
• LEGAL RESPONSIBILITIES
• CONTRACTUAL REQUIREMENTS
• STRUCTURAL ACCURACY
• PLANT EQUIPMENT LOCATOINS
• SAFETY
• INTERFACE WITH EXISTING FEATURES
• RECORDING OF EXISTING CONDITIONS
• MAINTENANCE AND ACCESS RECORDS

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compliance with design

• Siting of the building
• Footings
• Aesthetics
• Town Planning
• Functionality (especially re levels)
• Integration of specialist equipment
• Tolerances

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legal responsibilities

• Site / building ownership titles
• Council requirements, Planning Building
  Approvals
• Easements and covenants
• Height restrictions
• Set backs
• Boundaries encroachments

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contractual requirements

• Certify that building is within boundaries
• Building tolerances Australian Standards
• Leases tenancy area surveys
• Property Council of Australia Nett Lettable Areas
• Owners reliance on built area for income
• Strata title and Agreement to Lease requirements

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structural accuracy

• Structure is designed to support loads
• Eccentricity of loadings
• Building stability deflection
• Shop drawings details

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plant equipment locations

• Temporary plant
• Crane capacities footing locations
• Hoists
• Gantries, scaffold temporary accesses
• Permanent equipment
• Lifts, escalators, switchboards, substations,
  print presses, etc

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safety

• In ground services
• Electricity, water, sewer, stormwater
• Foundation design, footings and support
• Bridges, culverts, roads civil engineering
  structures

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interface with existing features

• Refurbishments
• Extensions to existing buildings
• Existing structural grids structural capacity

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record of existing conditions

• As built drawings
• Historical records, heritage requirements
• Check for damage (Dilapidation Survey)
• Monitor movements of historic structures

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maintenance and access

• As built surveys
• Locating in ground services
• Repairs maintenance

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outputs from surveys

• Title Survey
• Site Plan
• Setout Plans
• Grid Establishment Plan
• Detailed Plans, Sections, Elevations
• As Built Surveys

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survey methods 1

• 1. Establishment survey
• Transferring levels and lines onto site
• TBMs
• Grids
• Set out points
• Marks and points outside the site

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survey methods 2

• 2. Equipment
• Dumpy Level, Theodolite, Laser, EDM
• Licensed Surveyor for key establishment and
  regular checks
• Builders tradesmen transferring and setting out

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survey methods 3

• 3. Progressive survey
• Transferring levels and grids up the structure
• Excavation and footing set out
• Each concrete pour
• Slab edges
• Beam locations
• Columns walls
• Wall finishes set out

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survey methods 4

• 4. Special surveys
• Set out complex building elements and shapes
• Site measurement for prefabricated elements
  (steelwork, precast, glass, joinery, etc)

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survey methods 5

• 5. As built survey
• Check building against external TBMs and grids
• Check external wall locations against title
  boundary
• Check protrusions (eg balconies, awnings)

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summary

• Complying with designers intent
• Correctly locating structures elements
• Recording existing conditions
• Satisfying legal, contractual and title issues
• Critical interface between design and
  construction

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SURVEYING FOR CONSTRUCTION PROFESSIONALS

• Peter Southwell
• Probuild Constructions (Aust) Pty Ltd
• BBldg (Melb)