Skip to main content

Pinned Post

Battle of Iwo Jima Facts, Significance, Photos, & Map

 Battle of Iwo Jima Date 19 February – 26 March 1945 (1 month and 1 week) Location  Iwo Jima, Volcano Islands, Japan Result  American victory USAAF fighter aircraft able to escort B-29's on missions to Japan. Americans gain an emergency landing base for damaged aircraft returning from missions on Japan. Belligerents  United States  Japan Commanders and leaders U.S. Navy: Chester W. Nimitz Raymond A. Spruance Marc A. Mitscher William H. P. Blandy U.S. Marine Corps: Holland M. Smith Harry Schmidt Graves B. Erskine Clifton B. Cates Keller E. Rockey Tadamichi Kuribayashi † Takeichi Nishi † Sadasue Senda † Rinosuke Ichimaru † Units involved American: Ground units: V Amphibious Corps 3rd Marine Division 4th Marine Division 5th Marine Division 147th Infantry Regiment (separate) Aerial units: Seventh Air Force Naval units: 5th Fleet Joint Expeditionary Force (TF 51) Amphibious Support Force (TF 52) Attack Force (TF 53) Expeditionary Troops (TF 56) Fast Carrier Force (T...
Post a Comment

Golden Gate Bridge History, Construction, & Facts

 Golden Gate Bridge


Coordinates

37°49′11″N 122°28′43″W

Carries

6 lanes of US 101 / SR 1

Bicycle route: USBR 95

Eastern walkway: pedestrians or bicycles during selected hours

Western walkway: bicycles (only when pedestrians are allowed on the eastern sidewalk)

Crosses

Golden Gate

Locale

San Francisco, California and Marin County, California, U.S.

Official name

Golden Gate Bridge

Maintained by

Golden Gate Bridge, Highway and Transportation District

Characteristics

Design

Suspension, Art Deco, truss arch & truss causeways

Material

Steel

Total length

8,980 ft (2,737.1 m), about 1.7 mi (2.7 km)

Width

90 ft (27.4 m)

Height

746 ft (227.4 m)

Longest span

4,200 ft (1,280.2 m), about 0.79 miles (1.28 km)

Clearance above

14 ft (4.3 m) at toll gates, trucks cannot pass

Clearance below

220 ft (67.1 m) at high tide

History

Architect

Irving Morrow

Engineering design by

Joseph Strauss, Charles Ellis, Leon Solomon Moisseiff

Construction start

January 5, 1933

Construction end

April 19, 1937

Opened

May 27, 1937; 84 years ago

Statistics

Daily traffic

110,000


Golden Gate Bridge, suspension bridge spanning the Golden Gate in California to link San Francisco with Marin county to the north. Upon its completion in 1937, it was the tallest and longest suspension bridge in the world. The Golden Gate Bridge came to be recognized as a symbol of the power and progress of the United States, and it set a precedent for suspension-bridge design around the world. Although other bridges have since surpassed it in size, it remains incomparable in the magnificence of its setting and is said to be the most photographed bridge in the world. It carries both U.S. Route 101 and California State Route 1 (Pacific Coast Highway) across the strait and features a pedestrian walkway.

Building of the towers of the Golden Gate Bridge during its construction, c. 1934.

The bridge’s orange vermilion color, suggested by consulting architect Irving Morrow, has a dual function, both fitting in with the surrounding natural scenery and being clearly visible to ships in fog. At night the bridge is floodlit and shines with a golden luminescence that reflects off the waters of the bay and creates a magical effect.

Its construction, under the supervision of chief engineer Joseph B. Strauss, began in January 1933 and involved many challenges. The strait has rapidly running tides, frequent storms, and fogs that made construction difficult. During one such fog on August 14, 1933, a cargo vessel collided with the access trestle, causing serious damage. Workers also had to contend with the problem of blasting rock under deep water to plant earthquake-proof foundations. A movable safety net, innovated by Strauss, saved a total of 19 men from falling to their deaths during construction. However, the safety net failed on February 17, 1937, when it gave way under the weight of a scaffolding collapse; of the 13 men who were on the scaffolding, one jumped clear, two survived the fall into the water, and 10 were killed. One other worker fell to his death during the construction, for a total of 11 worker deaths over four years.

The bridge opened to vehicular traffic on May 28, 1937, under budget and ahead of schedule. The main span, 1,280 metres (4,200 feet) long, is suspended from two cables hung from towers 227 metres (746 feet) high; at midpoint the roadway is 81 metres (265 feet) above mean high water. Until the completion of the Verrazzano-Narrows Bridge in New York City in 1964, it had the longest main span in the world.

Comments

Post a Comment

Popular posts from this blog

History of Florence

 Florence Florence , Italian Firenze, Latin Florentia, city, capital of Firenze provincia (province) and Toscana (Tuscany) regione (region), central Italy. The city, located about 145 miles (230 km) northwest of Rome, is surrounded by gently rolling hills that are covered with villas and farms, vineyards, and orchards. Florence was founded as a Roman military colony about the 1st century bce, and during its long history it has been a republic, a seat of the duchy of Tuscany, and a capital (1865–70) of Italy. During the 14th–16th century Florence achieved preeminence in commerce and finance, learning, and especially the arts. History of Florence The early period Florentia (“The Flourishing Town”) was founded in 59 bce as a colony for soldiers of the armies of Rome and was laid out as a rectangular garrison town (castrum) below the hilltop Etruscan town of Faesulae. Its streets formed a pattern of rectangular blocks, with a central forum, a temple to Mars, an amphitheatre, and public...
Post a Comment
Read more

Forbidden city-location, history &map

 Forbidden City Location of forbidden city Forbidden City, Chinese (Pinyin) Zijincheng or (Wade-Giles romanization) Tzu-chin-ch’eng, imperial palace complex at the heart of Beijing (Peking), China. Commissioned in 1406 by the Yongle emperor of the Ming dynasty, it was first officially occupied by the court in 1420. It was so named because access to the area was barred to most of the subjects of the realm. Government functionaries and even the imperial family were permitted only limited access; the emperor alone could enter any section at will. The 178-acre (72-hectare) compound was designated a UNESCO World Heritage site in 1987 in recognition of its importance as the centre of Chinese power for five centuries, as well as for its unparalleled architecture and its current role as the Palace Museum of dynastic art and history. The architecture of the walled complex adheres rigidly to the traditional Chinese geomantic practice of feng shui. The orientation of the Forbidden City, and f...
Post a Comment
Read more

Gregorian calendar-facts and definition

  The introduction of the Gregorian calendar, depicted in relief on the tomb of Pope Gregory XIII in St. Peter's Basilica, Vatican City. Gregorian calendar, also called New Style calendar, solar dating system now in general use. It was proclaimed in 1582 by Pope Gregory XIII as a reform of the Julian calendar. By the Julian reckoning, the solar year comprised 365 1/4 days, and the intercalation of a “leap day” every four years was intended to maintain correspondence between the calendar and the seasons. A slight inaccuracy in the measurement (the solar year comprising more precisely 365 days, 5 hours, 48 minutes, 45.25 seconds) caused the calendar dates of the seasons to regress almost one day per century. Although this regression had amounted to 14 days by Pope Gregory’s time, he based his reform on restoration of the vernal equinox, then falling on March 11, to March 21, the date it occurred in 325 CE, which was the time of the First Council of Nicaea, and not the date of the equ...
Post a Comment
Read more