Rip Rap - Large Boulders (12 - 24")

Rip Rap - Large Boulders (12 - 24"): Product Overview

Rip Rap - Large Boulders (12 - 24") are heavy, irregular stones commonly used for erosion control and structural stabilization. Each boulder typically weighs between 150 and 800 pounds. The size range is nominally 12 to 24 inches in diameter, with up to 15% of a load possibly containing pieces up to 3 feet long. These boulders are most often composed of granite, limestone, or other hard rock types. The natural, angular shape and rough texture provide excellent interlocking and stability. Rip Rap - Large Boulders are not suitable for use as a top layer, base material, or for areas where foot or vehicle traffic is expected. They are not designed to be walked or driven on.

Key Characteristics and Specifications

• Size: 12" to 24" nominal diameter, with some pieces up to 3 feet
• Weight: Approximately 150 - 800 lbs per piece
• Composition: Granite, limestone, or similar hard rock
• Shape: Irregular, angular to sub-angular
• Texture: Rough, enhances interlock and reduces movement
• Density: Specific gravity typically 2.6 - 2.8
• Free of fines and organic material
• Complies with ASTM D 448 Class 3 or 4 and US Army Corps of Engineers guidelines

The large mass and density of these boulders make them resistant to weathering and erosion. Their non-uniform shape creates voids, aiding drainage and further reducing movement under water flow. Color and appearance may vary depending on the quarry source.

Correct Applications and Limitations

• Not intended for top layers, pathways, driveways, or any surface to be walked or driven on
• Best suited for heavy-duty erosion control and structural protection
• Installation requires heavy equipment and proper site preparation
• Loose or improper placement can reduce effectiveness

Rip Rap - Large Boulders are used in locations where their size and weight are needed to withstand strong water forces. They are not suitable for decorative top layers or areas requiring smooth, walkable surfaces. These boulders should not be used as a base material or for landscaping projects where stability under foot or vehicle traffic is required.

Functional Uses of Rip Rap - Large Boulders

These boulders are primarily used for erosion control along shorelines, riverbanks, and slopes. Their heavy weight and interlocking properties protect soil from being washed away and help stabilize embankments. They are also used in hydraulic structures, such as breakwaters, seawalls, and stormwater outlets, to dissipate energy from flowing water. In civil engineering, rip rap is placed around bridge abutments and channel linings to prevent scour and undermining.

Common Applications

A graded granular base or geotextile fabric is often recommended beneath the boulders to improve drainage and prevent soil migration. Due to their size and weight, these boulders must be installed using heavy machinery. Proper placement is critical: the stones should interlock tightly to minimize movement and maximize stability. Loose stacking or excessive voids can compromise the effectiveness of the rip rap layer.

Specifications and Standards

Ordering, Delivery, and Site Requirements

When ordering Rip Rap - Large Boulders from Gravelshop, you receive bulk material sourced from verified local suppliers. All prices include delivery, with no hidden fees. Road access to your site must be at least 12 feet wide and suitable for heavy trucks. The driver will unload the material at the most suitable location on your property, as determined at the time of delivery. We do not offer spreading or landscaping services. If you are not present, you are responsible for the material once it is delivered and left unattended.

You can calculate your required quantity using the material calculator on our website. Orders can be placed online, and payment is accepted by major credit cards and digital wallets. Minimum order quantities may apply depending on your location. Please allow for up to 5% size variation and the presence of some dirt, used to cushion the stones during transport.

Sample Pricing Across the US

Rip Rap - Large Boulders are available for delivery in many regions across the United States. Prices vary by location, reflecting local sourcing and delivery logistics. Below is a table with sample prices from different cities, showing the price per ton and delivery charge. All prices are in US dollars.

To see the exact price for your location, enter your ZIP code on the Gravelshop homepage. All prices shown include delivery. Delivery times and minimum order quantities may vary by region. For any questions about ordering, payment, or delivery, contact Gravelshop support by phone, email, or the contact form on our website.

Summary

Rip Rap - Large Boulders (12 - 24") provide heavy-duty erosion control and structural protection. They are intended for use in areas exposed to strong water flow, such as shorelines, embankments, and hydraulic structures. These boulders are not suitable for top layers, walkways, or driveways. Installation requires proper site access and heavy equipment. All orders from Gravelshop include delivery, and prices can be checked by ZIP code. Please review local requirements and ensure proper site preparation before ordering.