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Chapter 17
Floor Plan Dimensions and Notes
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
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
Floor Plan Dimensions
Placing Exterior Dimensions
Placing Interior Dimensions
Standard Feature Dimensions
Omitting Dimensions Established by the Foundation
• Foundation: – System placed on the
ground and used to support the building
• Certain features on floor plan are established on foundation plan
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
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
Masonry Veneer on the Floor Plan
• Masonry veneer– Application of thin
(4") masonry to the exterior of a wood-frame structure
• Can also be applied to interior frame partitions’
Concrete Block and Structural Masonry Construction
• Concrete block– Can be used to
construct exterior or interior walls
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
Solid Concrete Construction on the Floor Plan (cont’d.)
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
Floor Plan Notes and Specifications (cont’d.)
• General notes apply to features on the entire drawing– Commonly lettered in
field of the drawing
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
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
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
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
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