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Construction Blueprint Essentials: Understanding Dimensioning, Scales & Quantity Takeoffs

Learn about dimension lines, reading drawing scales, stationing, line types, and how to perform quantity takeoffs for construction projects. Gain insights into architectural, engineering, and metric scales for accurate measurements.

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Construction Blueprint Essentials: Understanding Dimensioning, Scales & Quantity Takeoffs

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  1. CE 303: Introduction to Construction Blueprint Lab

  2. Dimensioning 1’ - 8” 4” 8’ -

  3. Objectives • Dimension Lines • Reading Drawing Scales • Architectural • Engineering • Stationing • Line-types and Placement • Introduction to Quantity Takeoffs

  4. Drawing Scale • construction projects are drawn to a reduced scale • scale is defined as • architectural scale • 1/4” = 1’-0” this means every 1/4” on the drawing equals a one foot of actual length on the project • 1/8” = 1’-0” • engineering scale • 1” = 10’, or 20’ etc. • metric scale • 1:50

  5. Reading Scales architectural scale 2’ 1 inch 4’ 1 inch 2’ 2 inches 2 inches 16’

  6. Reading Scales 4” 2’ - architectural scale 20’-6”

  7. Reading Scales architectural scale 2’ - 8½”

  8. Reading Scales 3’-8” architectural scale 5 5/8”

  9. Reading Scales 100 feet 50 feet 1 inch 1 inch 10 feet engineering scale

  10. Reading Scales 2 meters 10 meters metric scale

  11. Stationing • Dimensioning of an alignment in 100 foot intervals. • Each 100 ft. is denoted as 1+00 • 100’ = 1+00, 200’ = 2+00, etc.. • Known as full stations • Intermediate stations are between full stations and are known as plus stations. • 147’ = 1+47, 357.24 = 3+57.24, etc…

  12. Line-types & Placement • Dimension and Extension Lines. • Marking device placed at end of dimension line • Arrows, dot, tick… • Extension lines are drawn perpendicular to dimension line to specify features between which the dimension applies.

  13. Dimension Lines

  14. Quantity Takeoffs • Quantities derived from drawings • Square footage, linear footage, cubic footage… • List of all materials • Requires understanding of geometry (calculations from straight lines, curves, angles...) • Accurate quantity takeoffs are required for detailed cost estimates. • Can include labor and equipment costs

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