1. Floor Plan Dimensions and Notes
Chapter 17
Floor Plan Dimensions and Notes

2. Introduction Dimensions Provide measurements used for construction
Found on all types of architectural drawings
Presented using lines, numerical values, and symbols, or notes and specifications
Drawings must include all dimensions needed for construction

3. Aligned Dimensions Aligned dimensioning
Most common dimensioning system
Dimensions placed in line with dimension lines
Read from bottom or right side of sheet
Extension lines show the extent of dimension
Start with a small space from feature being dimensioned and extend past last dimension line

4. Floor Plan Dimensions

5. Placing Exterior Dimensions

6. Placing Interior Dimensions

7. Standard Feature Dimensions

8. Omitting Dimensions Established by the Foundation
System placed on the ground and used to support the building
Certain features on floor plan are established on foundation plan

9. Dimensioning Arc and Circular Floor Plan Features
Features originating from the foundation do not require floor plan dimensions
Referencing dimensions on the floor plan is a good idea
Other features are dimensioned by location and radius or diameter dimension

11. Common Sizes of Architectural Features
All walls, edges of brick, and brick fireplaces are thick lines
All other lines are thin
Refer to text for dimensions of:
Room components
Plumbing fixtures and appliances
Doors and windows

12. Masonry Veneer on the Floor Plan
Application of thin (4") masonry to the exterior of a wood-frame structure
Can also be applied to interior frame partitions’

13. Concrete Block and Structural Masonry Construction
Can be used to construct exterior or interior walls

14. Solid Concrete Construction on the Floor Plan
Residential construction, mostly limited to:
Foundations
Basements
Subterranean homes
Construction:
Concrete is poured into forms which mold the mixture

15. Solid Concrete Construction on the Floor Plan (cont’d.)

16. Floor Plan Notes and Specifications
Specific notes relate to specific features
Include:
Window and door schedule
Room names and appliance labels
Tub, shower, and spa labels
Fireplace or solid fuel–burning appliance labels
Stair and closet labels
Access, firewalls, and floor lines

17. Floor Plan Notes and Specifications (cont’d.)
General notes apply to features on the entire drawing
Commonly lettered in field of the drawing

18. Designing Floor Plans Using Standard Construction Modules
Material conservation and construction labor simplification is important to consider
Standard inch construction modules are 12", 16", and 24"
When possible, design the overall building and major projections using these modules

19. Using Metric Dimensions
Unit of metric measure commonly used is the millimeter (mm)
Meters (m) are used for large site plans and civil engineering drawings
Hard conversions
Typical inch units converted directly to metric
Soft conversions
Product is manufactured directly using metric units

20. Using Metric Dimensions (cont’d.)
Placing metric dimensions on a drawing
All dimensions specified with dimension lines are in millimeters
Millimeter symbol is omitted
When more than one dimension is quoted
Millimeter symbol is placed only after the last dimension

21. Using Metric Dimensions (cont’d.)
Rules for writing metric symbols and names
Unit names are lowercase
Use vertical text for unit symbols
Use lowercase text except for proper names
Leave a space between a numeral and symbol
Do not leave a space between a unit symbol and prefix

22. Using Metric Dimensions (cont’d.)
Rules for writing metric symbols and names (cont’d.)
Do not use the plural of unit symbols
Use the plural of spelled-out metric measurements
Do not mix unit names and symbols
Millimeters (mm) are assumed