A rock shed is a

civil engineering Civil engineering is a professional engineering discipline that deals with the design, construction, and maintenance of the physical and naturally built environment, including public works such as roads, bridges, canals, dams, airports, sewage ...

structure used in mountainous areas where rock slides and land slides create highway closure problems. A rock shed is built over a roadway that is in the path of the slide. They are equally used to protect railroads. They are usually designed as a heavy

reinforced concrete Reinforced concrete (RC), also called reinforced cement concrete (RCC) and ferroconcrete, is a composite material in which concrete's relatively low tensile strength and ductility are compensated for by the inclusion of reinforcement having hig ...

covering over the road, protecting the surface and vehicles from damage due to the falling rocks with a sloping surface to deflect slip material beyond the road, however an alternative is to include an impact-absorbing layer above the ceiling. A further use of this type of structure may be seen protecting the

A4 road This is a list of roads designated A4. A4 is the name of several roads: * A004 road (Argentina), a road connecting Buenos Aires-La Plata highway with the Juan María Gutiérrez circle * A4 motorway (Austria), a road connecting Vienna and Nickelsd ...

; although constructed primarily to alleviate risk from falling rocks from a limestone seam it also serves to protect against objects or persons falling from the

Clifton Suspension Bridge The Clifton Suspension Bridge is a suspension bridge spanning the Avon Gorge and the River Avon, linking Clifton in Bristol to Leigh Woods in North Somerset. Since opening in 1864, it has been a toll bridge, the income from which provides fun ...

where the height differential of approximately 70 metres from the bridge to the bottom of the

Avon Gorge The Avon Gorge () is a 1.5-mile (2.5-kilometre) long gorge on the River Avon in Bristol, England. The gorge runs south to north through a limestone ridge west of Bristol city centre, and about 3 miles (5 km) from the mouth of the r ...

would give sufficient

kinetic energy In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its accele ...

to even a relatively small item to cause injury on impact.

Examples of rock sheds

where it passes under the

, Bristol, England, constructed in 1980 *

California State Route 1 State Route 1 (SR 1) is a major north–south state highway that runs along most of the Pacific coastline of the U.S. state of California. At , it is the longest state route in California, and the second-longest in the US after Monta ...

at Pitkins Curve, just north of

Limekiln State Park Limekiln State Park is a California state park on the Big Sur coast. It contains four lime kilns from an 1887–1890 lime-calcining operation, plus a beach, redwood forest, and Limekiln Falls. It is located south of Lucia on Big Sur Coast H ...

, constructed in 2014 * Ferguson Rock Shed, to rectify a closure of

California State Route 140 State Route 140 (SR 140) is a state highway in the U.S. state of California, 102 miles (164 km) in length. It begins in the San Joaquin Valley at Interstate 5 near Gustine, and runs east into Sierra Nevada, terminating in Yosemite National ...

by a landslide in 2006, completion expected in the mid-2020s

Examples of rock sheds

See also