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Structural load
A structural load is a force, deformation, or other action applied to a structure that its members must be designed to carry, including dead, live, and environmental loads.
Structural number
The structural number (SN) is an index in flexible pavement design expressing the structural strength required to carry design traffic over the subgrade soil, developed in 1961.
Structure
A structure, in engineering, is an arrangement of connected members such as beams, columns, cables, arches, and trusses that supports loads and transfers them safely to the ground.
Strukton
Strukton is a Dutch construction and engineering group headquartered in Utrecht, founded in 1921 as the railways' construction arm, that builds and maintains rail, road, water, and energy infrastructure.
Subak (irrigation)
Subak is Bali's traditional irrigation system, in which about 1,200 associations of rice farmers cooperatively manage canals, weirs, and water temples, a practice documented since the 9th century.
Submersible pump
A submersible pump, also called an electric submersible pump, is a pump with a sealed motor that operates fully submerged in the liquid it moves.
Subsea road tunnel
A subsea road tunnel, or subsea tunnel, is a road tunnel bored through bedrock beneath the seabed to link two shores; the form is most developed in Norway.
Subway (underpass)
A subway, also called a pedestrian underpass, is a walkway carrying pedestrians beneath a road or railway, common in British English to avoid crossing vehicle traffic.
Suez Canal (قناة السويس)
The Suez Canal (قناة السويس) is a sea-level waterway in Egypt connecting the Mediterranean and Red Seas, opened in 1869 after ten years of construction.
Suez Canal Authority (هيئة قناة السويس)
The Suez Canal Authority (هيئة قناة السويس) is the Egyptian state authority that owns, operates, and maintains the Suez Canal, created after Egypt nationalized the canal in 1956.
Suez Canal Company
The Suez Canal Company (Compagnie universelle du canal maritime de Suez) was the Franco-Egyptian company that built the Suez Canal, opened in 1869, and operated it until Egypt nationalized it in 1956.
Suez Canal expansion (2015)
The Suez Canal expansion of 2015, marketed by Egypt as the New Suez Canal, added a 35-kilometer parallel channel and widened bypasses, opening on 6 August 2015.
Suez Canal University
Suez Canal University (جامعة قناة السويس) is an Egyptian governmental university headquartered in Ismailia, established by presidential decree in 1976, serving the Canal governorates and Sinai with 20 faculties.
Suez Canal Zone
The Suez Canal Zone was the area of Egypt beside the Suez Canal where Britain kept a military garrison under the 1936 Anglo-Egyptian Treaty, evacuated in 1954 and 1956.
Suicide bridge
A suicide bridge is a bridge that gains a reputation as a frequent site for suicide by jumping, one of the most common suicide hotspot types.
Suicides at the Golden Gate Bridge
Suicides at the Golden Gate Bridge claimed nearly 2,000 people since the bridge opened in 1937, before a continuous suicide-deterrent net was completed on January 1, 2024.
Sukhna Lake
Sukhna Lake, also known as Sukhna Reservoir, is a 3 square kilometer rain-fed man-made lake at the Shivalik Hills foothills in Chandigarh, India, created in 1958.
Sukkur Barrage
Sukkur Barrage, originally the Lloyd Barrage, is a barrage across the Indus River at Sukkur, Pakistan, commissioned in 1932 to irrigate about 7.63 million acres.
Sultan Abdul Halim Muadzam Shah Bridge
The Sultan Abdul Halim Muadzam Shah Bridge, commonly called the Second Penang Bridge, is a 24 km toll bridge in Penang, Malaysia, opened in 2014 as the country's longest.
Sumner Tunnel
The Sumner Tunnel is a mile-long vehicular tunnel under Boston Harbor connecting East Boston with downtown Boston, opened on June 30, 1934, as Massachusetts' first traffic tunnel.
Sump
A sump is a pit or low space that collects liquid, usually water that drains in by gravity before being pumped out, as in a basement sump pump pit.
Sump pump
A sump pump is an automatic water pump in a sump pit set into a basement or crawlspace floor, pumping collected groundwater away from the building.
Sunda Strait crossing
The Sunda Strait crossing is a proposed bridge or undersea tunnel connecting Java and Sumatra, first proposed by President Soekarno in 1958; the bridge was canceled and no link exists.
Sundial Bridge at Turtle Bay
The Sundial Bridge is a pedestrian bridge over the Sacramento River in Redding, California, designed by Santiago Calatrava and opened in 2004 as one of the world's largest working sundials.
Sunshine Skyway Bridge
The Sunshine Skyway Bridge, formally the Bob Graham Sunshine Skyway Bridge, is a cable-stayed toll bridge opened in 1987 across lower Tampa Bay, Florida, between St. Petersburg and Bradenton.
Sup'ung Dam (水丰大坝)
Sup'ung Dam, also known as Shuifeng Dam or Sui-ho Dam, is a hydroelectric dam on the Yalu River, built by Japan between 1937 and 1943 as Asia's largest dam.
Superelevation
Superelevation, also called banking, is the cross slope built into a roadway on a horizontal curve, supplying part of the lateral acceleration needed to follow it and serving as a controlling design criterion in highway engineering.
Surajkund (सूरजकुंड)
Surajkund (सूरजकुंड, Surya Kund) is a 10th-century masonry rainwater-harvesting reservoir at Lakharpur in Faridabad district, Haryana, India, attributed to the Tomar king Surajpal and now the site of an annual international crafts fair.
Suramadu Bridge
The Suramadu Bridge, officially the Surabaya–Madura National Bridge, connects Surabaya on Java with Madura Island across the Madura Strait, and opened in 2009 as Indonesia's longest bridge.
Surfside condominium collapse
The Surfside condominium collapse, also known as the Champlain Towers South collapse, killed 98 people when part of a 12-story beachfront condominium fell in Surfside, Florida, in June 2021.