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, wax

Lacquer


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