5,208 articles
Spanish early-modern municipal aqueducts
Spanish early-modern municipal aqueducts were gravity-fed water-supply systems built from the sixteenth century, including Teruel's Los Arcos, Plasencia's San Antón, and Madrid's viajes de agua.
Special moment-resisting frame
A special moment-resisting frame, or SMF, is a highly ductile seismic force-resisting system of rigidly joined beams and columns, permitted in high seismic design categories.
Specific energy (open-channel flow)
Specific energy in open-channel flow is the energy of flowing water per unit weight relative to the channel bottom, equal to depth plus velocity head, and it classifies flow as subcritical, critical, or supercritical.
Spectral acceleration
Spectral acceleration is an earthquake engineering measure of the maximum acceleration a damped oscillator with a given natural period experiences in ground motion, approximating what a building experiences.
Spencer House
Spencer House is a Grade I listed eighteenth-century town house at 27 St James's Place, London, built between 1756 and 1766 for John Spencer, later First Earl Spencer.
Spencer's method
Spencer's method, published by E. Spencer in Géotechnique in 1967, is a limit equilibrium method of slices for computing a slope's factor of safety against failure.
Speyer Cathedral
Speyer Cathedral (Speyerer Dom), formally the Cathedral of St. Mary and St. Stephen, is a Romanesque imperial basilica in Speyer, Germany, founded by Emperor Konrad II in 1030.
Spillway
A spillway, or overflow channel, is a structure at or beside a dam that releases excess reservoir water so the dam is never overtopped and eroded.
Spillway bridge
A spillway bridge is a bridge deck carried on or across a dam spillway crest or gate structure, providing roadway access, gate-hoist support, and operator access over the flow surface.
Spillway hydraulics and safety
Spillway hydraulics and safety is the engineering analysis of whether a dam's spillway and outlet works can pass extreme floods without overtopping the dam or failing.
Spiral staircase
A spiral staircase is a stair whose wedge-shaped treads wind in a helix around a central column, letting the flight climb in a tight circular footprint; a helical stair winds around a central void instead.
Spire
A spire is a tall, slender, pointed structure that crowns a tower or roof, most often on a church, and is especially prominent in Gothic architecture.
Spire of Dublin
The Spire of Dublin, officially the Monument of Light, is a 120 m stainless steel monument on O'Connell Street, Dublin, built on the site of Nelson's Pillar and completed in 2003.
Spite house
A spite house is a building constructed or modified to annoy a neighbor or municipality, often blocking light or a view, at cost to its own occupant.
Split Rock Lighthouse
Split Rock Lighthouse is a decommissioned lighthouse on a 130-foot cliff of Lake Superior's North Shore near Two Harbors, Minnesota, built in 1910 and opened to visitors as a historic site.
Split-level home
A split-level home, also called a split-level or bi-level home, is a single-family house whose floors are staggered at half-story intervals, common in American postwar suburbs from the mid-1950s through the 1970s.
Sponge city
A sponge city is an urban development model where buildings, roads, and green space absorb, store, and slowly release rainwater, best known as China's national stormwater program begun in 2015.
Squat toilet
A squat toilet, also called a Turkish or Indian toilet, is a toilet used in a squatting posture, common across much of Asia, Africa, and the Middle East.
Sri Ahobila Narasimha Swamy Temple
Sri Ahobila Narasimha Swamy Temple (Ahobilam), a Divya Desam in the Nallamala hills, Nandyal district, Andhra Pradesh, where Narasimha is worshipped in nine forms (Nava Narasimhas) across Upper and Lower Ahobilam, seat of the Ahobila Mutt, famed for Brahmotsavam and Paruveta festivals.
Srikalahasteeswara temple
Srikalahasteeswara temple, also called Srikalahasti Temple, is a Hindu Shiva temple in Srikalahasti, Andhra Pradesh, where Shiva is worshipped as Vayu, the wind, among the five Pancha Bhoota Sthalams.
Srisailam Dam
Srisailam Dam, officially the Neelam Sanjeeva Reddy Srisailam Project, is a gravity dam on the Krishna River on the Telangana–Andhra Pradesh border, completed in 1984 and home to India's second largest working hydroelectric station.
St Augustine's Abbey, Canterbury
St Augustine's Abbey is a ruined Benedictine monastery in Canterbury, Kent, founded around 598 by St Augustine, a burial place for Kentish kings until its dissolution in 1538.
St George's Chapel, Windsor Castle
St George's Chapel is the late medieval royal chapel at Windsor Castle, begun in 1475 by Edward IV and the chapel of the Order of the Garter.
St Giles' Cathedral
St Giles' Cathedral, formally the High Kirk of Edinburgh, is a Church of Scotland parish church on the Royal Mile, founded in 1124 and known for its crown spire.
St James's Palace
St James's Palace is a Tudor royal palace in Westminster, London, built by Henry VIII between 1531 and 1536 and today the official seat of the British court.
St Mark's Basilica
St Mark's Basilica (Basilica di San Marco) is the cathedral of Venice and seat of the Patriarch of Venice, begun in 1063 and famous for its Byzantine domes and glass mosaics.
St Martin-in-the-Fields
St Martin-in-the-Fields is an 18th-century Neoclassical Church of England church on the north-east corner of Trafalgar Square, London, designed by James Gibbs and built 1722 to 1726.
St Patrick's Cathedral, Dublin
St Patrick's Cathedral, Dublin is the Church of Ireland national cathedral of Ireland, founded in 1191, with its present Gothic building dating from 1220 to 1259.
St Paul's Cathedral
St Paul's Cathedral is the Anglican cathedral of London on Ludgate Hill, designed by Christopher Wren and built from 1675 to 1711 after the Great Fire of 1666.
St Paul's Cathedral, Melbourne
St Paul's Cathedral, Melbourne: Anglican cathedral at Flinders and Swanston Streets, seat of the Archbishop of Melbourne. Designed by William Butterfield, built 1880–1891, spires by John Barr completed 1933.