The Cattle Grid: How Steel Bars Replaced the Ranch Gate

What Is a Cattle Grid?

A cattle grid is a rectangular pit dug into a road where it crosses a fence, covered with a grating of metal bars or tubes. The gaps are wide enough for animal hooves to drop into but too narrow to hinder car and truck wheels or people on foot. Animals are reluctant to walk on the grating, so they stay back while vehicles pass.

Most designs include a pit, a base for the grid, and wings that connect it to the fence, according to the Wikipedia article on cattle grids. In the western United States, the same device is more often called a cattle guard.

Where Did the Cattle Grid Come From?

The origin is not a single invention. Wikipedia says the modern road cattle grid was independently invented several times on the U.S. Great Plains around 1905 to 1915. A similar device for railroads was in use by 1836, and Britain used stone stiles, which let people but not livestock cross walls, as far back as before Roman times.

Texas Monthly claims the first recorded non-rail use was in Archer County, Texas, in 1881. Because that claim comes from a magazine and not a patent record, it should be treated as a local tradition. The Plains Humanities encyclopedia, the Kansas Oil Museum and other regional sources show the device was part of the open-range and fenced-range West, including a Encyclopedia of the Great Plains entry and the museum's cattle guard product page.

Why Ranchers Use Them

On a ranch, every gate is a chore. Someone has to open it, drive through and close it, and a gate left open can send a herd onto a highway or into the wrong pasture. A cattle grid removes that step, which is why grids are placed where roads cross fencelines, often at boundaries between public and private land.

They are common on moorland, rangeland and common land, and where railways cross unfenced lines. They are widespread in Australia, the Scottish Highlands, English and Welsh national parks, and the western United States and Canada. An Australian local paper explains the practical rules in the facts around cattle grids.

When Grids Fail

Not every animal respects a grid. Sheep may step between the bars, and bison and bulls can jump wide gaps. Goats are generally not stopped, though painted stripes have deterred them in one case. Horses and kangaroos risk having their legs trapped between the bars. Snow can build up beneath a grid and let animals walk across.

Vehicles passing over them create noise that can affect people within about 100 meters. For these reasons grids are often paired with a side gate for livestock drives and for riders.

Painted and Electric Alternatives

Painted virtual grids, which look like stripes to cattle, are used mostly on highways. They can fail once one animal in a herd learns to cross, and repainting costs can eventually exceed the cost of a metal grid. Electric grids are cheap to install but require vegetation control, can be torn out by low vehicles and may endanger children or animals that get stuck. Wider grids can contain wildlife, and doubled grids can help exclude deer and elk.

Learn More

Fences, gates and working ranch infrastructure are part of everyday ranch life. Explore ranch life on farm.FM or read a farm.FM story about ranch fences.