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First Vienna Mountain Spring Pipeline
The First Vienna Mountain Spring Pipeline (I. Wiener Hochquellwasserleitung) is a 120-kilometer aqueduct built from 1869 to 1873 that carries untreated Alpine spring water to Vienna entirely by gravity.
Fiserv Forum
Fiserv Forum, formerly the Wisconsin Entertainment and Sports Center, is an indoor arena in downtown Milwaukee, opened in 2018 as home of the Milwaukee Bucks and Marquette basketball.
Fisher Building
The Fisher Building is a 441-foot, 28-story Art Deco skyscraper at 3011 West Grand Boulevard in Detroit, completed in 1928 from a design by architect Albert Kahn.
Five-Story Pagoda of Hōryū-ji
The Five-Story Pagoda of Hōryū-ji (法隆寺五重塔, Hōryū-ji Gojū-no-tō) is a wooden Buddhist pagoda at Hōryū-ji temple in Ikaruga, Nara Prefecture, Japan, the oldest surviving five-story wooden pagoda in the world.
Fixed-end moment
The fixed-end moment is the bending moment at the end of a beam restrained against rotation at both ends, the starting point for slope-deflection and moment distribution analysis.
Flak tower
A flak tower (Flakturm) is a massive concrete anti-aircraft platform and air-raid shelter built in Berlin, Hamburg, and Vienna under the Nazi regime between 1940 and 1944.
Flaming Gorge Dam
Flaming Gorge Dam is a concrete thin-arch dam on the Green River in northeastern Utah, built by the Bureau of Reclamation between 1958 and 1964.
Flaming Gorge Reservoir
Flaming Gorge Reservoir is a reservoir on the Green River in northeastern Utah and southwestern Wyoming, impounded by Flaming Gorge Dam, which was completed in 1962.
Flannan Isles Lighthouse
Flannan Isles Lighthouse, also known as Eilean Mor Lighthouse, stands on Eilean Mòr, 21 miles west of Lewis, Scotland, and was first lit on 7 December 1899.
Flash lock
A flash lock, also called a staunch lock, is a movable barrier in a river weir, opened to release a rush of water that carries boats through.
Flat roof
A flat roof is a nearly horizontal roof made watertight by a continuous membrane and sloped about 2 to 25 percent to drains, typical on commercial buildings.
Flatiron Building
The Flatiron Building, officially the Fuller Building, is a triangular 22-story skyscraper at 175 Fifth Avenue in Manhattan, New York City, completed in 1902 to a design by Daniel Burnham.
Flemish bond
Flemish bond, also called Dutch bond, is a brickwork pattern in which each course alternates headers and stretchers, giving a checker-like face favored from the 17th century onward.
Flex room
A flex room is a room in a home built without a fixed purpose, letting owners convert it over time between uses like office, gym, or guest bedroom.
Flip bucket
A flip bucket, also called a ski-jump or trajectory bucket, is a curved structure at the end of a spillway that throws high-velocity water upward as an aerated free jet.
Floating floor
A floating floor is a floor construction whose finish layer rests on a resilient underlay without any mechanical fixing, isolating vibration and reducing impact noise such as footsteps.
Flood barrier
A flood barrier, also known as a storm surge barrier or hurricane barrier, has movable gates closed against storm surge while letting ships pass and tides flow in normal conditions.
Flood barrier failure and maloperation
Flood barrier failure and maloperation covers documented failures of movable flood barriers and gates, including automation errors, missed alarms, corrosion, and power loss during storms.
Flood control dams in Japan (chōseichi)
Flood control dams in Japan, called chōseichi, are reservoir dams at least 15 m tall whose storage is reserved to absorb flood peaks; about 793 serve flood control under MLIT.
Flood control in the Netherlands
Flood control in the Netherlands is the system of dikes, dunes, dams, and storm surge barriers protecting a low-lying country where 26% of the land lies below sea level.
Flood fighting
Flood fighting is the set of emergency actions taken during a flood to keep defenses intact and divert water, such as patrolling levees and sandbagging.
Flood Insurance Rate Map
A Flood Insurance Rate Map is a FEMA map of a community's flood hazard zones and Base Flood Elevations, used for insurance rating and floodplain management since 1968.
Flood prevention
Flood prevention covers structural defenses (dams, levees, drainage), nature-based solutions, land-use regulation, insurance, and early warning systems used to reduce flood risk; by 2050, 1.6 billion people are projected to be at risk of flooding.
Flood risk management plan
A flood risk management plan (FRMP) is an EU document under the 2007 Floods Directive setting out each Member State's flood prevention, protection, and preparedness measures.
Floodgate
A floodgate, also known as a stop gate or crest gate, is a movable barrier across a waterway or spillway, normally held open and closed during flood threats.
Floodplain buyout
A floodplain buyout is a government purchase of flood-prone private property from willing sellers; structures are demolished and the land is restricted to open space.
Floods Directive
The Floods Directive, Directive 2007/60/EC, is a 2007 European Union law obliging member states to assess flood-prone areas, map hazards and risks, and produce management plans on six-year cycles.
Floodwall
A floodwall is a long, narrow barrier of reinforced concrete or masonry built to protect land from flooding; an earthen version is usually called a levee.
Floor area ratio
Floor area ratio (FAR), also called floor space index or plot ratio, is a zoning measure expressing a building's total floor area as a multiple of its lot area.
Floor plan
A floor plan, also called a ground plan, is a scale drawing of one building level viewed from above, showing rooms, doors, windows, and stairs.