Construction
The
United States Department of War was headquartered in the Greggory Building, a temporary structure erected during
World War I along
Constitution Avenue on the
National Mall. The War Department, which was a civilian agency created to administer the
U.S. Army, was spread out in additional temporary buildings on National Mall, as well as dozens of other buildings in Washington, D.C.,
Maryland and
Virginia. In the late 1930s a
new War Department Building was constructed at 21st and C Streets in
Foggy Bottom but, upon completion, the new building did not solve the department's space problem and ended up being used by the
Department of State.
[6]When
World War II broke out in Europe, the War Department rapidly expanded with anticipation of being drawn into the conflict. Secretary of War
Henry L. Stimson found the situation unacceptable, with the Munitions Building overcrowded and the department spread out.
[7][8]
Stimson told President
Franklin D. Roosevelt in May 1941 that the War Department needed additional space. On July 17, 1941, a congressional hearing took place, organized by Virginia congressman
Clifton Woodrum, regarding proposals for new War Department buildings. Woodrum pressed Brigadier General
Eugene Reybold, who was representing the War Department at the hearing, for an "overall solution" to the department's "space problem" rather than building yet more temporary buildings. Reybold agreed to report back to the congressman within five days. The War Department called upon its construction chief, General
Brehon Somervell, to come up with a plan.
[9]
Main Navy Building (foreground) and the
Munitions Building were temporary structures built during
World War Ion the
National Mall. The Munitions Building served as the Department of War headquarters for several years before moving into the Pentagon.
Government officials agreed that the War Department building should be constructed across the
Potomac River, in
Arlington, Virginia. Requirements for the new building were that it be no more than four stories tall, and that it use a minimal amount of steel. The requirements meant that, instead of rising vertically, the building would be sprawling over a large area. Possible sites for the building included the Department of Agriculture's Arlington Experimental Farm, adjacent to
Arlington National Cemetery, and the obsolete
Washington Hoover Airport site.
[10]
The site originally chosen was
Arlington Farms which had a roughly pentagonal shape, so the building was planned accordingly as an irregular pentagon.
[11]Concerned that the new building could obstruct the view of Washington, D.C. from Arlington Cemetery, President Roosevelt ended up selecting the Hoover Airport site instead.
[12] The building retained its pentagonal layout because a major redesign at that stage would have been costly, and Roosevelt liked the design. Freed of the constraints of the asymmetric Arlington Farms site, it was modified into a regular
pentagon.
[13][14]
On July 28
Congress authorized funding for a new Department of War building in Arlington, which would house the entire department under one roof,
[15] and President Roosevelt officially approved of the Hoover Airport site on September 2.
[16] While the project went through the approval process in late July 1941, Somervell selected the contractors, including John McShain, Inc. of
Philadelphia, which had built
Washington National Airportin Arlington, the
Jefferson Memorial in Washington, and the
National Naval Medical Center in
Bethesda, Maryland, along with Wise Contracting Company, Inc. and Doyle and Russell, both from Virginia.
[17] In addition to the Hoover Airport site and other government-owned land, construction of the Pentagon required an additional 287 acres (1.16 km
2), which were acquired at a cost of $2.2 million.
[18] The Hell's Bottom neighborhood, a slum with numerous pawnshops, factories, approximately 150 homes, and other buildings around
Columbia Pike, was also cleared to make way for the Pentagon.
[19] Later 300 acres (1.2 km
2) of land were transferred to Arlington National Cemetery and to
Fort Myer, leaving 280 acres (1.1 km
2) for the Pentagon.
[18]
Contracts totaling $31,100,000 were finalized with McShain and the other contractors on September 11, and ground was broken for the Pentagon the same day.
[20] Among the design requirements, Somervell required the structural design to accommodate floor loads of up to 150 pounds per square inch, which was done in case the building became a records storage facility at some time after the end of the current war.
[16] A minimal amount of steel was used as it was in short supply during World War II. Instead, the Pentagon was built as a reinforced concrete structure, using 680,000 tons of sand dredged from the
Potomac River, and a lagoon was created beneath the Pentagon's river entrance.
[21] To minimize steel, concrete ramps were built rather than installing elevators.
[22][23] Indiana limestone was used for the building's facade.
[24]
Northwest exposure of the Pentagon's construction underway, July 1, 1942
Architectural and structural design work for the Pentagon proceeded simultaneously with construction, with initial drawings provided in early October 1941, and most of the design work completed by June 1, 1942. At times the construction work got ahead of the design, with different materials used than specified in the plans. Pressure to speed up design and construction intensified after the
attack on Pearl Harbor on December 7, 1941, with Somervell demanding that 1,000,000 sq ft (9.3 ha) of space at the Pentagon be available for occupation by April 1, 1942.
[25] David J. Witmer replaced Bergstrom as chief architect on April 11 after Bergstorm resigned due to charges, unrelated to the Pentagon project, of improper conduct while he was president of the
American Institute of Architects.
[26]
Construction of the Pentagon was done during the period of
racial segregation in the United States. This had structural consequences to the design of the building. Under the supervision of colonel
Leslie Groves, the decision to have separate eating and lavatory accommodations for whites and blacks was made and carried out. The dining areas for blacks were put in the basement and on each floor there were double toilet facilities separated by gender and race. These measures of segregation were said to have been done in compliance with the state of Virginia’s racial laws. The Pentagon as a result has double the standard amount of toilet facilities that would be needed for a building of its size.
[27][28]
President Roosevelt had made an order ending such racial discrimination in the U.S. military in June 1941. When the President visited the Pentagon before its dedication, he questioned Groves regarding the number of washrooms and ordered him to remove the “Whites Only” signs. Until 1965 the Pentagon was the only building in Virginia where segregation laws were not enforced.
[28]
The soil conditions of the Pentagon site, located on the Potomac River floodplain, presented challenges to engineers, as did the varying elevations across the site, which ranged from 10–40 ft (3.0–12 m) above sea level. Two retaining walls were built to compensate for the elevation variations, and cast-in-place (Franki) piles were used to deal with the soil conditions.
[29] Construction of the Pentagon was completed in approximately 16 months at a total cost of $83 million. The building is 77 feet (23 m) tall, and each of the five sides of the building is 921 feet (281 m) long.
[30]
Because of the pressing needs of the war, people started working in the Pentagon before it was completed. The Pentagon was built wing at a time, and after the first wing was finished, employees started to move into that wing while construction was continuing on the other wings.
[edit]Protests
The Pentagon became a spot for protests against the
Vietnam War during the late 1960s. A group of 2,500 women, organized by
Women Strike for Peace, demonstrated outside of Secretary of Defense
Robert S. McNamara's office at the Pentagon on February 15, 1967.
[31] In May 1967, a group of 20 demonstrators held a sit-in outside the Joint Chiefs of Staff's office, which lasted four days before they were arrested.
[32] In one of the better known incidents, on October 21, 1967, some 35,000 anti-war protesters organized by the
National Mobilization Committee to End the War in Vietnam, gathered for a demonstration at the Defense Department (the "March on the Pentagon"), where they were confronted by some 2,500 armed soldiers. During the protest, a famous picture was taken, where
George Harris placed
carnationsinto the soldiers' gun barrels.
[33] On May 19, 1972, the American radicals known as the
Weather Underground Organization successfully planted and detonated a bomb in a fourth-floor women's restroom in the Pentagon. They announced it was in retaliation for the
Nixon administration's bombing attacks on
Hanoi during the final stages of the Vietnam War.
[34]
On March 17, 2007, 4,000 to 15,000 people (estimates vary significantly) protested against the
Iraq War.
[35] The protesters marched from the
Lincoln Memorial, down Washington Boulevard to the Pentagon’s north parking lot.
[edit]Renovation
From 1998 to 2011, the Pentagon underwent a major renovation, known as the
Pentagon Renovation Program. This program, completed in June, 2011, involved the complete gutting and reconstruction of the entire building in phases to bring the building up to modern standards, removing
asbestos, improving security, providing greater efficiency for Pentagon tenants, and sealing of all office windows.
[36]
As originally built, most Pentagon office space consisted of open bays which spanned an entire ring. These offices used
cross-ventilation from operable windows instead of air conditioning for cooling. Gradually, bays were subdivided into private offices with many using
window air conditioning units. With renovations now complete, the new space includes a return to open office bays, a new Universal Space Plan of standardized office furniture and partitions developed by
Studios Architecture.
[37]
[edit]September 11 attacks
9/11 anniversary illumination
On September 11, 2001, the 60th anniversary of The Pentagon's groundbreaking, a team of five
al-Qaeda affiliated hijackers took control of
American Airlines Flight 77,
en routefrom
Washington Dulles International Airport to
Los Angeles International Airport, and deliberately crashed the
Boeing 757airliner into the western side of the Pentagon at 9:37 am EDT as part of the
September 11 attacks. All 64 people on the airliner were killed as were 125 people who were in the building. The impact of the plane severely damaged the structure of the building and caused its partial collapse.
[39] At the time of the attacks, the Pentagon was under renovation and many offices were unoccupied, resulting in fewer casualties. Only 800 of 4,500 people who would have been in the area were there because of the work. Furthermore the area hit, on the side of the Heliport Entrance facade, was the section best prepared for such an attack. The renovation there, improvements which resulted from the
Oklahoma City bombing, had nearly been completed.
[40][41][42]
It was the only area of the Pentagon with a sprinkler system, and it had been reconstructed with a web of steel columns and bars to withstand bomb blasts. The steel reinforcement, bolted together to form a continuous structure through all of the Pentagon's five floors, kept that section of the building from collapsing for 30 minutes—enough time for hundreds of people to crawl out to safety. The area struck by the plane also had blast-resistant windows—2 inches thick and 2,500 pounds each—that stayed intact during the crash and fire. It had fire doors that opened automatically and newly built exits that allowed people to get out.
[40]
Contractors already involved with the renovation were given the added task of rebuilding the sections damaged in the attacks. This additional project was named the "
Phoenix Project", and was charged with having the outermost offices of the damaged section occupied by September 11, 2002.
[43][44][45]
When the damaged section of the Pentagon was rebuilt, a small indoor memorial and chapel were included, located at the point of impact. For the fifth anniversary of the September 11, 2001 attacks, a memorial of 184 beams of light shone up from the center courtyard of the Pentagon, one light for each victim of the attack. In addition, an American flag is hung each year on the side of the Pentagon damaged in the attacks, and the side of the building is illuminated at night with blue lights. After the attacks, plans were developed for an outdoor memorial, with construction underway in 2006. The
Pentagon Memorial, which consists of a park with 184 benches on 2 acres (8,100 m
2) of land, according to the victims' ages, from 3 to 71, was opened to the public on September 11, 2008.
[46][47][48]
[edit]Shooting incidents
On March 4, 2010, at 6:40 pm, two police officers working for the
Pentagon Force Protection Agency were shot at near an entrance to the Pentagon and fired back with their pistols at the suspect. The officers were slightly injured but were treated in a hospital and released. The suspect, identified as
John Patrick Bedell (aged 36), died at the hospital. No clear motive was established.
[49] On October 19, 2010, shortly before 5 am, an unidentified gunman shot at the south side of the building, shattering windows on the third and fourth floors.
[50]
[edit]Earthquake
On August 23, 2011, a 5.8 magnitude earthquake in
Mineral, Virginia, shook the Pentagon.
[51] The building suffered minor damage, with flooding from broken pipes.
Aerial view of the Pentagon
The Pentagon compared to several large structures
The Pentagon, 1414 ft or 431 m
The Pentagon building spans 28.7 acres (116,000 m
2), and includes an additional 5.1 acres (21,000 m
2) as a central courtyard.
[52] It has five façades, listed starting with the north side and moving
clockwise: the Mall Terrace Entrance façade, the River Terrace Entrance façade, the Concourse Entrance (or Metro Station) façade, the South Parking Entrance façade, and the Heliport façade.
[42] On the north side of the building, the Mall Entrance, which also features a portico, leads out to a 600 ft (180 m) long terrace that is used for ceremonies. The River Entrance, which features a
portico projecting out 20 ft (6.1 m), is located on the northeast side, overlooking the lagoon and facing Washington. A stepped terrace on the River Entrance leads down to the lagoon; and a landing dock was used until the late 1960s to ferry personnel between
Bolling Air Force Base and the Pentagon.
[52] The main entrance for visitors is located on the southeast side, where the
Pentagon Metro station and the bus station are located. There is also a concourse on the southeast side of the second floor of the building, which contains a mini-shopping mall. The Pentagon's south parking lot is located on the southwest side of the Pentagon, and the west side of the Pentagon faces
Washington Boulevard.
The concentric rings are designated from the center out as "A" through "E" (with in addition "F" and "G" in the basement). "E" Ring offices are the only ones with outside views and are generally occupied by senior officials. Office numbers go clockwise around each of the rings, and have two parts: a nearest-corridor number (1 to 10) followed by a bay number (00 to 99), so office numbers range from 100 to 1099. These corridors radiate out from the central courtyard, with corridor 1 beginning with the Concourse's south end. Each numbered radial corridor intersects with the corresponding numbered group of offices (for example, corridor 5 divides the 500 series office block). There are a number of historical displays in the building, particularly in the "A" and "E" rings.
Floors in The Pentagon are lettered "B" for Basement and "M" for
Mezzanine, both of which are below ground level. The concourse is located on the second floor at the metro entrance. Above ground floors are numbered 1 to 5. Room numbers are given as the floor, concentric ring, and office number (which is in turn the nearest corridor number followed by the bay number). Thus, office 2B315 is on the second floor, B ring, and nearest to corridor 3 (between corridors 2 and 3). One way to get to this office would be to go to the second floor, get to the A (innermost) ring, go to and take corridor 3, and then turn left on ring B to get to bay 15.
[53]
It is possible for a person to walk between any two points in the Pentagon in less than seven minutes.
[54]
The
United States Postal Service has established six
ZIP Codes for The Pentagon, to which the place name “Washington, D.C.” is assigned, even though The Pentagon is actually located in
Virginia. The Secretary of Defense, the Joint Chiefs of Staff, and the four service branches each have their own designated ZIP Code.
[56]
The Pentagon, south parking lot side
[edit]Security
