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Introduction to Understanding Plans

Introduction to Understanding Plans. 2006 Highways & Engineering Conference. Introduction. Know your plans White = preliminary/design phase Blue = final review phase (still taking comments) Ivory = final plans Types of plans Right of Way Utility Construction (focus of this presentation).

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Introduction to Understanding Plans

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  1. Introduction to Understanding Plans 2006 Highways & Engineering Conference

  2. Introduction • Know your plans • White = preliminary/design phase • Blue = final review phase (still taking comments) • Ivory = final plans • Types of plans • Right of Way • Utility • Construction (focus of this presentation)

  3. Title Sheet • Provides basic project information • Project number • Scope of project • Name of project • County • Length of project • Maps of project • Beginning and ending stationing and referencing points • Denotes any bridges within project limits

  4. Title Sheet (cont.) • Basic project information (cont.) • Design and traffic data • Surfacing sources • Logo and designer • Source to find out more about the project • Control number • Best way to identify the project • Engineer’s approval • Scale • CSF-combination scale factor • Plans scale

  5. Sheet 2 • Table of contents • Lists the contents of the project plans and the corresponding sheet numbers • Notes • Additional project specific information for the contractor and construction inspectors (i.e. basis of plan quantities)

  6. Sheet 3Linear and Level Data • Shows the design centerline coordinate table and benchmark locations and elevations • Length of roadway • Length of bridges (if any) • Source data for bearing • Level datum source

  7. Sheets 4 and 5 • Control Traverse Diagram • A visual layout of the surveyed control traverse for the project • Control Traverse Abstract • It lists the control point numbers and describes their physical location • Sheets 3, 4, and 5 contain the survey information that was established and used to design the project. And is the same information used by the field crews to build the project.

  8. Typical Sections Sheet 6 • Typical sections are cross sections of the roadway and terrain at defined intervals • They include the following information • Type and thickness of material to be used to construct the roadway • Widths of finished driving surface and subgrade • Surfacing quantities • Cut and fill slope rates • Stations (from/to) where typical section applies • Identifies transition from a given typical to the next

  9. Summary Sheets Sheets 9-15 • Summarize all quantities of work and/or materials required by the project • The contractor uses this information to prepare a cost estimate for bid • Summary sheets provide • Name of the item (i.e. pavement removal, curb, culverts, etc…) • Quantities required and the unit of measurement • Location where the product is to be used by station • Distance from the centerline (if applicable)

  10. Detail Drawings Sheets 18-23 • Additional design details • This information is usually specific to the project and not contained in MDT’s standard detailed drawings (i.e. irrigation siphon, detours, etc…)

  11. Mass Diagram Sheet 24 • Not all sets of plans have a mass diagram- only ones with earthwork projects • The mass diagram illustrates the volume and movement of earth needed to construct the roadbed (cut and full)

  12. Plan Sheets • Contains the basic geometry of the road along with horizontal (left/right) and vertical (up/down) curve data • Are divided into two views • Plan view is as one looks at the roadway from above (on the upper half of the page) • Profile view is as one looks at the roadway from the side (on the lower half of the page)

  13. Elements on Both Plan & Profile Views • Centerline • Stations • Callouts • Offsets

  14. Centerline • The centerline is a solid notched line on plans depicting the center of the roadway • Each notch represents • 20 M (Metric) • 20 ft. (English) • C L

  15. Stations • The measurement for distance and used for identifying specific locations on the project • Stationing is measured along the centerline • It does NOT usually start at 0+00.00- its starting point is dependent on historical projects

  16. Stations (cont.) • A metric station = 100 M • An English station = 100 ft. • 17+70.05 = 1,770.05 meters • Stations are numbered left to right on the plans • Position left or right of centerline is determined as one faces the direction of increased station numbers

  17. Callouts • Points on plans that provide more detail about a certain feature (i.e. pipe, power lines, etc…) Information included in callouts: • Station • Physical attributes • Shown on both the plan and profile view

  18. Offsets • Location of items not directly on centerline • Described as left (LT) or right (RT) of centerline station

  19. Plan View Sheet 34 • Horizontal alignment of the roadway • North/south directional arrow • Centerline curve data located by station on the plan-stationing is shown at the top of the view • Existing topography • Buildings, trees, rivers, etc.. • New right-of-way • Existing right-of-way easement • Culverts

  20. Plan View (cont.)

  21. Find the following NO (refer to sheet 2) • Are there any impacted wetlands? • Is there a core hole? • What type of utilities are shown? • How many horizontal curves are shown? • Are there any new culverts? YES Telephone & Fiber optic 3 NO- just a removal (refer to culvert summary-pgs. 12 & 13)

  22. Profile View Sheet 34 • Shows the elevation view of the roadway centerline for the proposed and existing roadway • Stationing is shown at the bottom of the profile view (horizontal axis) • Elevations are shown on the left hand side of the profile view (vertical axis) • Vertical alignment data • Vertical curve data

  23. Profile View (cont.) • Guardrail stations- new and remove • Approach locations- new and abandon • Includes public, private, commercial, and farm/field • Other details • Retaining walls • Sub-excavation • Geotextile • Bridge ends • Core locations with core data • Mail box turnouts

  24. Profile View (cont.)

  25. Find the following 70+02.98 • What station does the guardrail end at on the left? • What is the length of the vertical curve at station 70+20? • What is grade of the road between station 70+20 and 73+90? • At what station is core hole #5? 150 meters 2% 70+65.60

  26. Other Parts of Plans • Some other sections of plans you may encounter • Signing plans • Bridge plans • Electrical plans • Cross sections • Wetland mitigation plans

  27. Questions?

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