Proportioning
GOLDEN MEAN ~ 5:8
(length to width proportions for cases & cabinets)
Multiply short leg by 1.618 = long leg
FIBONACCI SERIES (1, 1, 2, 3, 5, 8, 13, 21,...)
A function of the Golden Mean
(Each successive number is the sum of the preceding two numbers.)
Proportioning for projects like a chest of drawers or a set of shelves.
HAMBRIDGE PROGRESSION
(i.e. calculating graduated drawer heights)
1. Make square A A (A = drawer width)
2. Strike arc from square A A's diagonal
3. Draw horizontal line from intersection of arc and vertical line
Note: You cannot pre-select the total height of all drawers. Final height of the drawers is a function of the number of drawers and drawer width.
Formulas
Decimal = mm x .03937
Millimeter = decimal x 25.4
Circumference of circle = π x 2R
Area of circle = π x R²
Area of triangle = 1/2 B x H
Area of square = L x W
LAYOUT SIMPLE ARCH
(X/2)²+ Y² / 2Y = R
LAYOUT ELLIPSE WITH A SQUARE
BOARD FOOT CALCULATION
Length (inches) x Width (inches) x Thickness (inches) / 144
Furniture Moisture Content in the U.S.
Design Criteria for Furniture
Seating dimensions at dining table:24"-30" elbow to elbow
24"-25" leg clearance (floor to apron)
Table edge to back of plate - 12"
Round table - 30" circumference per seating
Table height - 29"-30"
Chair seat height - ~ 17"
Coffee table height - 16"-18"
Stool height - 29"-32"
Single (twin) mattress - 39" x 75"
Double (full) mattress - 54" x 75"
Queen mattress - 60" x 80"
King mattress - 76" x 80"
MAXIMUM SPAN FOR SHELVING
3/4" MDF - 28"
3/4" Plywood - 32"
3/4" Softwood - 34"
3/4" Hardwood - 40"
1" Softwood - 34"
1" Hardwood - 46"
Solvents for Finishes
Varnish, oil, spar, linseed oil, polyurethane, tung oil, waxLacquer
Shellac
Waterborne
Mineral spirits, naptha, turpentine
Lacquer thinner, acetone
Denatured alcohol
Distilled water
|
Pilot Hole Wood Screws |
|||
|---|---|---|---|
| Screw Size | Softwood | Hardwood | Shank Hole |
| #4 | 5/64" | 5/64" | 7/64" |
| #6 | 1/16" | 3/32" | 9/64" |
| #8 | 5/64" | 7/64" | 11/64" |
| #10 | 3/32" | 1/8" | 3/16" |
| #12 | 3/32" | 9/64" | 7/32" |
| #14 | 7/64" | 5/32" | 1/4" |
| When screwing 2 pieces of wood together, the top piece should be drilled for the screw shank to slip through easily. | |||
| Bandsaw Blade Guide | |
|---|---|
| Blade Width | Minimum Cutting Radius |
| 3/4" | 5-7/16" |
| 1/2" | 2-1/2" |
| 3/8" | 1-7/16" |
| 1/4" | 3/8" |
| 3/16" | 5/16" |
| 1/8" | 1/8" |
| 1/16" | 90° |