Cattle Guards: Round Top, Flat Top, and Load-Rated Options
A properly installed cattle guard provides vehicle access through a fenced area without requiring a gate to be opened and closed. Cattle guards are commonly used at pasture entrances, driveways, ranch roads, and public roadway crossings where livestock need to remain contained while vehicles need convenient access.
Barn World offers several cattle guard designs, including round top, flat top, and boxed cattle guards. Load-rated options are also available for applications where the cattle guard must support the vehicle traffic expected at the crossing.
Choosing the Right Cattle Guard
The right cattle guard depends on how and where it will be used. Traffic speed, vehicle weight, livestock being contained, installation conditions, and whether the crossing is on private property or a public road are all important considerations.
For example, a cattle guard used on a private driveway may have different requirements than one installed across a public road. Public roadway projects may require a specific load rating and engineering documentation, while a private installation may allow more flexibility.
The design of the top rails is another important consideration. Round rails create a more pronounced rounded surface, while flat-top rails provide a smoother surface for vehicle traffic.
Round Top Rail Cattle Guards
Round top rail cattle guards are a traditional cattle guard design. Round pipe is welded across heavy-duty structural supports and installed over a recessed or open area. The space beneath the rails creates the visual depth that discourages livestock from attempting to cross.
Round rails are particularly useful when livestock containment is the primary consideration. The curved surface makes it difficult for cattle to obtain secure footing on the rails.
These cattle guards require a properly constructed foundation to support the guard and transfer the weight of crossing vehicles into the ground. Soil conditions, drainage, frost depth, and the expected traffic should all be considered during installation.
Installing a Round Top Cattle Guard
Installation is an important part of the performance and longevity of a round top cattle guard. The foundation must be capable of supporting the cattle guard and the vehicles crossing it. Local soil conditions and drainage should be evaluated before construction begins.
For a permanent installation, a contractor familiar with local ground conditions can help determine the appropriate foundation and installation method.
Boxed Cattle Guards
Boxed cattle guards are designed to sit directly on a prepared surface rather than requiring the same type of recessed foundation used with traditional cattle guards. A steel skirt around the perimeter helps keep soil and debris from moving underneath the guard.
Boxed cattle guards are commonly used on private driveways, pasture entrances, construction sites, and other lower-speed applications. They can also be useful for locations where a semi-portable cattle guard is preferred.
A properly prepared base is important. Crushed rock can provide a stable surface and help with drainage. The installation should be positioned so that the rails remain slightly above the surrounding ground rather than becoming buried as the surface settles.
One advantage of a boxed cattle guard is that it can be moved when necessary. The guard can be removed from the prepared location, cleaned underneath, and repositioned when the site requires a change.
Flat Top Rail Cattle Guards
Flat top rail cattle guards are commonly selected for crossings where vehicles travel at higher speeds. The top rails provide a flatter surface than traditional round rails, creating a smoother vehicle crossing while still providing a livestock barrier.
Flat top cattle guards are frequently used on public roads and other higher-speed crossings. They can also be used on private roads and driveways where a smoother vehicle crossing is preferred.
The appropriate cattle guard should be selected based on the expected vehicle traffic, livestock, roadway conditions, and applicable project requirements.
Cattle Guard Foundations
Cattle guard foundations provide the structural support needed for many permanent cattle guard installations. The foundation helps distribute vehicle loads and provides a stable base for the cattle guard.
Barn World offers cattle guard configurations that can be supplied with precast concrete foundations. These systems can simplify installation because the foundation components are prepared before arriving at the job site.
Site preparation is still important. The installation area should be properly graded and prepared, with attention given to drainage, soil conditions, and the finished roadway surface.
Cattle Guard Load Ratings
Load rating is an important consideration when selecting a cattle guard for a public road or another application with substantial vehicle traffic. Different load ratings are available for different roadway requirements.
Cattle Guard Load Ratings
H-15 (12 tons per axle)
H-20 / HS-20 (16 tons per axle)
U-54 (25 tons per axle)
U-80 (30 tons per axle)
When a cattle guard is being installed on a public roadway, the required load rating and engineering documentation should be confirmed with the agency responsible for the road. State, county, and local requirements can vary depending on the roadway and expected traffic.
Private Use Cattle Guards
Cattle guards installed on private property generally have different requirements than those installed on public roads. A private driveway, ranch road, or pasture entrance may not require the same certification or documentation as a public roadway project.
The expected traffic should still be considered when selecting a cattle guard. Farm equipment, trucks, trailers, and other heavy vehicles can place substantial loads on the crossing.
For a private installation, choosing a cattle guard based on the actual vehicles that will use the crossing can help avoid paying for specifications or documentation that are not required for the application.
Cattle Guards for Private Driveways
Cattle guards are commonly used at private driveways, ranch entrances, and property-access roads where vehicles need regular access through a fence line. The appropriate guard depends on the vehicles using the driveway, the required crossing width, site conditions, and whether a traditional foundation or boxed installation is more practical.
For a private driveway, consider the heaviest vehicles that may use the entrance, including delivery trucks, trailers, farm equipment, and service vehicles. The cattle guard and its supporting structure should be selected for the expected loads rather than everyday passenger vehicles alone.
Cattle Guards for Public Roads
Public roadway installations require additional planning because the road authority may specify the required load rating, dimensions, foundation, and other construction details.
Before ordering a cattle guard for a public road, check with the appropriate state, county, or local transportation authority. Having the project specifications available will help determine the correct cattle guard configuration.
How to Choose a Cattle Guard for Your Property
Consider these questions when selecting a cattle guard:
- Will the cattle guard be installed on private property or a public road?
- What types of livestock need to be contained?
- What vehicles will cross the cattle guard?
- Will vehicles cross at low or higher speeds?
- What width is required for the roadway or driveway?
- Is a permanent or semi-portable installation preferred?
- Does the project require a specific load rating or engineering documentation?
- What foundation and drainage conditions exist at the installation site?
Answering these questions before ordering can help narrow the available designs and ensure that the cattle guard is appropriate for the application.
Frequently Asked Questions About Cattle Guards
What is the difference between a round top and flat top cattle guard?
Round top cattle guards use curved rails that create a more pronounced crossing surface. Flat top cattle guards provide a smoother surface for vehicles and are commonly used where roadway and traffic conditions make that design appropriate.
What is a boxed cattle guard?
A boxed cattle guard is designed to sit on a prepared surface and has a steel perimeter that helps keep dirt from moving underneath the guard. These cattle guards are commonly used for private driveways, pasture entrances, construction sites, and other lower-speed applications.
Do cattle guards require a foundation?
Foundation requirements depend on the cattle guard design and installation. Traditional cattle guards commonly require a properly constructed foundation, while boxed designs can be installed on a prepared surface. Public roadway projects may have specific foundation requirements.
What cattle guard load rating do I need?
The required load rating depends on the vehicles using the crossing and the requirements of the project. Public roadway installations may require a specified rating, so the appropriate road authority should be consulted before ordering.
Can a cattle guard be used on a public road?
Yes, cattle guards are used on public roads, but the installation must meet the requirements of the applicable roadway authority. Those requirements can include load rating, dimensions, engineering documentation, and foundation specifications.
Can a cattle guard replace a gate?
A cattle guard can provide vehicle access through a fenced opening without requiring drivers to open and close a gate. It is designed primarily to discourage livestock from crossing the opening.
Are cattle guards suitable for horses?
Cattle guards are primarily designed for cattle and livestock with similar hoof characteristics. They should not be relied upon as a safe barrier for horses, which can attempt to cross and potentially suffer serious leg injuries.
What size cattle guard do I need?
The required size depends on the width of the roadway or driveway, fence configuration, vehicle traffic, and applicable project requirements. For public roads, the required dimensions should be confirmed with the responsible roadway authority.
Can a cattle guard be moved?
Some boxed cattle guards are designed as semi-portable units and can be relocated when necessary. Permanent cattle guards with constructed foundations are intended for a more fixed installation.
Get Help Selecting a Cattle Guard
If you are unsure which cattle guard design, size, or load rating is appropriate for your project, provide the roadway dimensions, expected vehicle traffic, livestock, and any specifications from the local road authority. This information can help determine the appropriate cattle guard configuration and make it easier to prepare a quote.