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Architectural Dimensioning Part 1

Architectural Dimensioning Part 1. Floor-Plan Dimensions. Dimensioning system Aligned dimensioning --dimensions are placed in line with the dimension lines and are read from the bottom or right side of the drawing sheet Dimension lines are solid (Thin) and not broken

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Architectural Dimensioning Part 1

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  1. Architectural DimensioningPart 1

  2. Floor-Plan Dimensions • Dimensioning system • Aligned dimensioning--dimensions are placed in line with the dimension lines and are read from the bottom or right side of the drawing sheet • Dimension lines are solid (Thin) and not broken • Dimensions are placed above dimension lines approximately 1/16” above line

  3. Example of Aligned Dimensioning Note: Dimensions readable from the bottom of sheet and right side of sheet above the dimension line

  4. Writing the Actual Dimension • Feet and Inch/fractions: 6’-7 1/2” • Even feet no inches: 4’- 0” • Feet and zero inches/fractions: 8’- 0 3/4” • No feet only inches: 10” • No feet only inches/fractions: 5 1/2” • Only fractions of an inch: 3/4”

  5. General Rules to Follow for Placing Dimensions • Place exterior dimensionsoutside the floor plan, starting with the smallest first, then subtotals and finally overall totals • Place interior dimensions inside the floor plan in string fashion. Several strings may be required both horizontally and vertically

  6. Arrows or Terminators • For class project use diagonal lines for all dimensioning terminators • Use arrows for all leaders and callouts

  7. 1/8” to 3/16” 1/32” to 1/16” Making Arrows for Leaders • Arrows for dimensions and leader lines should be the same • Arrows usually have a set proportion and have a slender look to them

  8. Making Tick Marks for Terminators • Commonly 1/8” long at 45 degree • Usually done freehand A thick slash is common on manual and CADD drawings Freehand slash all in the same direction

  9. Dimension Procedures • Dimensions are placed on the drawing are dependant upon the type of material the walls are constructed of: • 1) Frame or wood studs • 2) Brick or stone veneer over frame • 3) Solid masonry and cast concrete • Discussion today include 1 and 2

  10. Frame or Wood Studs Walls • Two x 4 or 2 x 6 make up the Skeleton of the structure • A common wood frame wall is 5 1/4” thick • This wall is drafted 6”

  11. Frame or Wood Studs Walls • To communicate to the carpenter this exterior wall is dimensioned to the outside face of stud • This dimension is 1 1/4” from the outside line of the wall

  12. Frame or Wood Studs Walls • Materials terms that make up the wood frame wall: • Siding (3/4”) • Sheathing (1/2”) • Stud (2x4) • Gypsum Board (1/2”) • Insulation in stud wall

  13. Spacing of Dimensioning Lines • First string of dimensions are usually placed about 3/8” to 1” from the object depending upon the amount of space available • Second string of dimensions are placed 3/8” to 1/2” from the first string of dimensions • Additional strings of dimensions are spaced like the second string of dimensions

  14. Dimensioning Exterior Frame or Wood Stud Walls • Dimension to the outside face of stud • Dimension to centers of doors and windows • Do not dimension interior partitions with the exterior string of dimensions

  15. Steps in Dimensioning a Plan • Step #1--Place extension lines at face of exterior studs, center lines at centers of doors and windows • Place first string of dimension lines about 3/4” away from floor plan

  16. Steps in Dimensioning a Plan • Step #2--Place second string of dimensions about 1/2” from first string • These dimensions are considered to be subtotals

  17. Steps in Dimensioning a Plan • Step #3--Place overall dimension line about 1/2” away from previous dimension line • Check that all cumulative dimension equal the subtotal dimensions

  18. Brick or Stone Veneer over Frame • Same skeleton as framed structure but stone or brick replaces the siding with air space between brick and sheathing • Dimensioned to face of stud

  19. Brick or Stone Veneer over Frame • Dimension to the outside face of stud • Dimension to centers of doors and windows • Do not dimension interior partitions with the exterior string of dimensions

  20. Dimension Exercise #1 • Read Instructions & Follow all rules that apply: • #1--Dimension exterior horizontal dimensions • #2--Dimension exterior vertical dimensions

  21. Dimensioning Steps • Tape drawing to drafting table and square with drafting machine. • All work at this point will be with a 4H pencil (very thin): .3mm or .5mm with hard lead

  22. Dimensioning Steps • Place Extension lines at measuring points of the plan: 1)Face of stud of wood wall (1 ¼”) from outside wall line, 2)Face of stud of Veneer wall (5 ¼” from outside wall line, 3)Center of door and window Center Line Add Extension lines

  23. Dimensioning Steps • Place first line of dimension from plan (3/8” to 1”) 3/8” to 1” from plan

  24. Dimensioning Steps • Add sub total and total dimension lines. Note some plans will not require sub total dimension lines 3/8” to ½” ” from previous line

  25. Dimensioning Steps • Clean up extension lines and dimension lines and add any final dimension lines: (thickness of brick to face of stud, do only once and write (TYP) meaning TYPICAL • Label at one location (TO FACE OF STUD) with leader pointing to it. To Face of Stud 5 ¼”(TYP)

  26. Add Tick Marks Add Dimens For each string Dimensioning Steps • Add tick marks at all intersections of extension lines and dimension lines. • Add guidelines above dimension lines and place values of measurements between tick marks

  27. Dimension Exercise #1 Solution

  28. Lab Time • First--Work on Dimensioning Exercise • Second—Work on Project Floor Plan

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