1. Let’s create a floor plan in 3D to help visualize how it works
House Build
Let’s create a floor plan in 3D to help visualize how it works

2. SCALE
Architectural drafters use architect’s, engineer’s, and combination scales. 2

3. Architect’s Scale
Divided into 3/32", 3/16", 1/8", 1/4", 1/2", 3/8", 3/4", 1", 1-1/2", and 3" to the foot.
One edge divided into 16 parts to the inch.
Divisions based on 12 units to the foot.
Used for most work. 3

4. Size Compared to Scale “Size” and “scale” need clarification.
“Half size” means the drawing is one half as large as the object.
Scale: 1/2" = 1'-0" means the drawing is 1/2 scale.
1/2 scale means 1/2" on the drawing = 1'-0" on the object.
Residential plans are generally 1/4" = 1'-0" scale. 4

5. Reading the Scale
The 1/8" = 1'-0" and 1/4"=1'-0" scales are printed on the upper edge of this architect’s scale.
(continued) 5

6. Reading the Scale
The proper method of measuring 16'-4" using the 1/4" = 1'-0" scale. 6

7. Time for Math If a room is 12’ x 12’ (master bedroom)…
What would it be if it was drawn at ½ size?
What would it be if it was drawn at ¼ size?
Full
1/2
1/4

8. Scale Applied If a room is 12’ x 12’ (master bedroom)…
If our scale is ½” = 1’-0”….every ½” on your paper would be 1’ of the real object…so the room you would draw would be how big?
12” 6”
12” 6”

9. It’s Got to Fit on the Paper
If a room is 12’ x 12’ (master bedroom)…
If our scale is ¼” = 1’-0”…the room is 3x3
If our scale is 1/8” = 1’-0”…the room is 1.5x1.5
If the house is 40x60…what is it at ¼ scale?

10. OK…Assignment Time Design a ranch style home (one story)
Include the following:
Master bedroom and bath with closet
2 guest bedrooms with closets
Guest bathroom
Living
Kitchen
Dining or office
2 car garage
Laundry / pantry / ½ bath / linen / coat closet

12. Room Sizes Front Entrance: 3’ wide Hallway: 3’ – 8’ wide
Referenced from Blue Architecture Book
Chapter 8…Page 128
Front Entrance: 3’ wide
Hallway: 3’ – 8’ wide
Formal Living Room: 12’ x 14’
Family Room: 13’ x 18’
Dining Room: 9’ x 11’
Den/Study/Office: 9’ x 9’
Bedroom: 9’ x 10’
Master Bedroom: 12’ x 14’
Closet: 2’ x 4’
Water Closet: 3’ x 6’
Kitchen: as needed (min 150 sq ft)
Garage: 11’ x 20’ (1 car) 21’ x 21’ (2 car)