Difference between revisions of "As-built surveys"

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===Finishing grades: as-built surveys===
Throughout the construction process, it is sometimes necessary to deviate from the intended design of LID features and adapt the design to on-site conditions. The completion of a post-construction as-built survey is a standard operating procedure for engineering projects that captures any changes made to the feature’s design during construction. For an example of municipal standards for as-built surveys, refer to the City of Toronto's [https://www.toronto.ca/wp-content/uploads/2017/11/98c7-ecs-specs-surveys-engsrv_survey_standards_for_consultant.pdf Engineering Survey Standards for Consultants]<ref>City of Toronto. 2021. Engineering Survey Standards for Consultants. https://www.toronto.ca/wp-content/uploads/2017/11/98c7-ecs-specs-surveys-engsrv_survey_standards_for_consultant.pdf</ref>
Throughout the construction process, it is sometimes necessary to deviate from the intended design of LID features and adapt the design to on-site conditions. The completion of a post-construction as-built survey is a standard operating procedure for engineering projects that captures any changes made to the feature’s design during construction.


'''Survey Steps:'''
'''Survey Steps:'''
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#If a pre-engineering survey is not available, use a reference feature as the datum.
#If a pre-engineering survey is not available, use a reference feature as the datum.
#Identify the type, diameter, and material of exposed utilities.
#Identify the type, diameter, and material of exposed utilities.
#Include data on critical feature elevations and existing utilities, such as:<ref>https://www.toronto.ca/wp-content/uploads/2017/11/98c7-ecs-specs-surveys-engsrv_survey_standards_for_consultant.pdf </ref>
#Include data on critical feature elevations and existing utilities, such as:
***Inverts of newly installed pipe
#*Inverts of newly installed pipe
***Vertical and horizontal bends in pipes
#*Vertical and horizontal bends in pipes
***Existing public utilities
#*Existing public utilities
***Existing private utilities
#*Existing private utilities
***New and existing structures (e.g., catchbasins, manholes, chambers, etc.)
#*New and existing structures (e.g., catchbasins, manholes, chambers, etc.)


'''Inspection Points:'''
'''Inspection Points:'''
*Datum matches the pre-engineering survey or selected reference feature.
*Datum matches the pre-engineering survey or selected reference feature.
*Data provided in as-built survey matches the as-built standards of the local municipality.
*Data provided in as-built survey matches the as-built standards of the local municipality.
<references/>

Latest revision as of 17:38, 30 September 2022

Throughout the construction process, it is sometimes necessary to deviate from the intended design of LID features and adapt the design to on-site conditions. The completion of a post-construction as-built survey is a standard operating procedure for engineering projects that captures any changes made to the feature’s design during construction. For an example of municipal standards for as-built surveys, refer to the City of Toronto's Engineering Survey Standards for Consultants[1]

Survey Steps:

  1. Use the same datum as the pre-engineering survey.
  2. If a pre-engineering survey is not available, use a reference feature as the datum.
  3. Identify the type, diameter, and material of exposed utilities.
  4. Include data on critical feature elevations and existing utilities, such as:
    • Inverts of newly installed pipe
    • Vertical and horizontal bends in pipes
    • Existing public utilities
    • Existing private utilities
    • New and existing structures (e.g., catchbasins, manholes, chambers, etc.)

Inspection Points:

  • Datum matches the pre-engineering survey or selected reference feature.
  • Data provided in as-built survey matches the as-built standards of the local municipality.