How to Convert Cubic Yards to Tons of Rip Rap

Without a barrier, ocean currents can gradually wear away at the coast.
••• Images

People who live near the sea fortify shorelines with riprap, a collection of rock or rubble. This stone barrier absorbs the waves' force, helping an otherwise vulnerable shore resist erosion. Engineers refer to a riprap layer as the shoreline's armor. They need to know the mass or volume of riprap necessary to create a barrier. The material's density lets them convert between these factors.

    Determine the riprap's density. If the riprap consists of crushed stone, its density is 2,500 pounds per cubic yard. If it contains mostly gravel, its density is 2,700 pounds per cubic yard. If the riprap contains concrete or limestone rubble, it has a density of 4,050 or 4,600 pounds per cubic yard, respectively.

    Multiply the riprap's cubic yardage by its density. For example, if the you are calculating the weight of 15 cubic yards of gravel: 15 × 2,700 = 40,500 lb.

    Divide this answer by 2,000, which is the number of pounds in a ton: 40,500 ÷ 2,000 = 20.25. This is the riprap's weight, measured in tons.

Related Articles

List of Minerals Found Under the Sea Bed
Conversion of LBM to Gallons
What Is the Difference Between Permeable & Impermeable?
What Types of Soil Are in the Ocean?
Estuary Soil Types
Brine Vs. Conductivity
How to Calculate the Weight of a Brick
Interesting Facts About Beaches
Natural Disasters Caused by Earthquakes
What Is Low Density?
The Difference Between Metaconglomerate & Conglomerate
How to Identify Sandstone
How to Convert Cubic Centimeters to Grains
What Are the Three Most Common Cementing Agents for...
What Are the Most Common Landforms?
How to Calculate Density, Volume and Mass
Types of Materials That Create the Best Echoes
Types of Intrusive Igneous Rock With Large Crystals
How to Identify Basalt
How to Convert the Measurement of Cubic Feet to Tons