Rip Rap (6 - 12")

Rip Rap (6 - 12"): Erosion Control Stone for Soil Stabilization

Rip Rap (6 - 12") is a loose, angular stone material designed for effective erosion control and soil stabilization. Each stone measures between 6 and 12 inches in nominal diameter and typically weighs from 30 to 150 pounds per piece. Stones are commonly made from granite, limestone, or other hard rock types, and are washed to remove fines such as dirt and sand. The irregular, angular shapes allow the stones to interlock, providing stability and resistance against displacement by water flow. Rip Rap is supplied loose, not mortared, and provides high permeability, making it suitable for applications where water needs to drain through the material.

This product is widely known under several names, including riprap, rock armor, erosion control stone, shot rock, rubble stone, and armor stone. It is manufactured to meet ASTM D6092 standards for stone used in erosion control. Stones are selected for durability, with a minimum specific gravity typically at or above 2.5 (ASTM C127) and absorption rates of 2% or less. Rip Rap must also pass freeze-thaw and abrasion resistance tests (ASTM C535, C131). It is free from organic material, clay, or debris, and is placed to a specified thickness-often 1.5 to 2 times the maximum stone size. For some installations, a filter fabric or bedding layer may be required underneath to prevent soil migration through the voids.

Rip Rap (6 - 12") is delivered as a bulk product. Allow for up to 15% of the load to include stones larger than the specified size range, with some pieces measuring up to 1 or 2 feet. Traces of dirt may be present due to transport requirements. This product is not suitable for use as a walkable surface, for decorative landscaping where a uniform appearance is needed, or as a compacted base or structural fill. It should not be used in high-velocity flow areas unless the stone size is adequate, nor in underwater applications without proper engineering. Soil particles can migrate through the voids if a filter layer is not used.

Key Characteristics of Rip Rap (6 - 12")

• Stone size: 6 to 12 inches (nominal diameter), approx. 30-150 lbs per piece
• Made from durable, angular granite, limestone, or other hard rock
• Irregular shapes for interlocking and stability
• Color: typically gray or earth tones, varies by source
• Washed and free of fines
• Meets ASTM D6092, C127, C535, and C131 standards
• High permeability, resists water displacement

Common Applications

• Erosion control on shorelines, riverbanks, and streams
• Slope stabilization and bridge abutment protection
• Stormwater channel lining and culvert inlet/outlet protection
• Dam, spillway, and roadway embankment armoring
• Retention pond edges and wave energy dissipation
• Scour protection in moderate flow conditions

Limitations and Incorrect Applications

Rip Rap (6 - 12") at a Glance

Comparison Notes

Rip Rap (6 - 12") provides more resistance to displacement than smaller stone, such as gravel. Unlike gabion baskets, Rip Rap is not confined in wire mesh and may be less stable on steep slopes. Compared to concrete revetment, Rip Rap is more permeable and flexible, but may require more maintenance. It offers immediate protection, unlike vegetative stabilization, but does not provide habitat or aesthetic benefits. The 6-12 inch size is intended for moderate flow conditions; larger sizes are used for higher energy environments.

Price Examples by Location

Rip Rap (6 - 12") is available for delivery across the United States. Prices vary by city, county, and delivery distance. The table below provides a sample of current prices, including both the per-ton material cost and delivery fee. For an exact quote for your location, enter your ZIP code on our website or add the product to your cart to view total costs, including all taxes and fees.

Ordering and Delivery with Gravelshop

Ordering Rip Rap (6 - 12") from Gravelshop is fast and straightforward. Enter your ZIP code to see local prices, add the product to your cart, and complete your order online. All prices include delivery, taxes, and fees-there are no hidden costs. Delivery will be made to the most suitable location on your property, as determined by the driver. If you are not present, you accept responsibility for the placement and security of the material. We do not spread the material, but drivers may perform a tail-gated dump at their discretion.

Gravelshop accepts major credit cards and digital payment methods. Orders can be placed online in less than a minute, and you will receive a confirmation email with payment and shipping details. You can select your preferred delivery date and time window during checkout. Our customer service team is available by phone, email, or SMS to answer any questions.

Summary

Rip Rap (6 - 12") is a durable, angular stone product for erosion control and soil stabilization in moderate flow environments. It meets industry standards for strength, durability, and sizing, and is delivered loose for easy placement. Not suitable for decorative, walkable, or structural fill uses. Pricing varies by location and includes delivery. For more details, use our online calculator or contact Gravelshop support.