2012 Retail Catalog - Gertens

VI
Helpful Formulas
To find # of cubic yards (CY) required for an area at
different material depths:
1. Calculate square footage of area, Length X Width = Square Footage
2. Determine depth desired and divide by appropriate number in the chart below
1" Deep: Sq. Ft. ÷ 324 = ! Cubic Yards needed 2" Deep: Sq. Ft. ÷ 162 = ! Cubic Yards needed
3" Deep: Sq. Ft. ÷ 108 = ! Cubic Yards needed 4" Deep: Sq. Ft. ÷ 81 = ! Cubic Yards needed
5" Deep: Sq. Ft. ÷ 67 = ! Cubic Yards needed 6" Deep: Sq. Ft. ÷ 54 = ! Cubic Yards needed
8" Deep: Sq. Ft. ÷ 40 = ! Cubic Yards needed 12" Deep: Sq. Ft. ÷ 27 = ! Cubic Yards needed
Approximate Coverage of Bagged Mulches and Landscape Rock
2 Cubic Foot Bag 3 Cubic Foot Bag 4 Cubic Foot Bag
24 square feet @ 1" deep 36 square feet @ 1" deep 48 square feet @ 1" deep
12 square feet @ 2" deep 18 square feet @ 2" deep 24 square feet @ 2" deep
8 square feet @ 3" deep 12 square feet @ 3" deep 16 square feet @ 3" deep
6 square feet @ 4" deep 9 square feet @ 4" deep 12 square feet @ 4" deep
One Ton = 2000 Pounds & One Yard = 1.4 Tons (2800 lb.)
for most bulk materials
Decorative Rock, Sand,
Wood Mulch, Black Dirt,
and Class 5 Material
and Concrete
One Ton will cover: One Cubic Yard will cover:
100 Sq. Ft. @ 2" Deep 108 Sq. Ft. @ 3" Deep
70 Sq. Ft. @ 3" Deep 80 Sq. Ft. @ 4" Deep
50 Sq. Ft. @ 4" Deep 65 Sq. Ft. @ 5" Deep
54 Sq. Ft. @ 6" Deep
Retaining Wall Granular Backfill
Use the following formulas to determine Cubic Yards of 3/4" Limestone needed to backfill a retaining wall.
For a 12" wide trench behind wall:
Total Wall Square Footage ÷ 27 = Cubic Yards
required.
Area of Circle:
3.14 x R² (R = Radius)
Circumference of Circle:
D x 3.14 (D = Diameter)
Helpful Formulas
Mathematical Formulas
For an 8" wide trench behind wall:
Total Wall Square Footage ÷ 40 = Cubic Yards
required.
Area of Triangle:
B x H x .5 (B = Base; H = Height)
Cubic Contents of Cylinder or Pipe:
Area of one end (circle) x L (L = Length)
General Conversions
Linear Area
1 Mile = 1760 yards = 5280 feet =1.61 kilometers 1 Square Mile = 640 acres (A)
1 Yard = 3 feet = .9 meters 1 Square Acre = 4840 square yards = 43,560 Sq.
Ft.
1 Foot = 12 inches = 30.4 centimeters 1 Square Inch = 6.45 centimeters (cm)
1 Inch = 2.54 centimeters 1 Square Yard = 9 square feet
1 Meter = 39.37 inches 1 Square Foot = 144 square inches
The above formulas are approximate coverage ratios. Exact product size depth of
coverage and use of product need to be taken into account before ordering.