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Horizontal integration facility

Integration facility where missiles and rockets are assembled before launch

A horizontal integration facility (HIF) is an integration facility where missiles and rockets are assembled before launch.

HIF in the United States

Site	Pad	Vehicle	Description	Images	Ref.
Cape Canaveral Space Force Station	SLC-37	Delta IV	A seven-story white building containing 2 bays measuring 250 ft by 100 ft each. Construction was completed in June 2000. Its floors are said to be the most level in the United States, varying less than 0.38 in (9.6 mm) across each bay. The first and second stages of the rocket, along with any boosters that are being used for that flight, are integrated in the HIF, and then the stack is moved to the pad and raised to vertical. The payload and fairing are assembled later.	[[Image:Two Boeing Delta IV first stages on the Launch Complex 37, Cap Canaveral Air Force Station, August 2004.jpg	frameless	100px]]
Cape Canaveral Space Force Station	SLC-40	Falcon 9	SpaceX built its first Falcon 9 HIF on the south side of the pad. It measures 225 ft long by 75 ft wide and stands about 50 ft tall. A former payload integration facility is directly adjacent to the HIF. The HIF was extended to a length of at least 72 metres to accommodate the longer versions of the Falcon 9.	[[File:Falcon 9 in SLC-40 hangar before roll-out - CRS-2 (KSC-2013-1676).jpg	frameless	100px]]	last=Clark	first=Stephen	date=2009-01-12	title=New SpaceX Falcon 9 rocket tests its Cape Canaveral pad	url=http://www.spaceflightnow.com/falcon/090112f9vertical/	url-status=live	archive-url=https://web.archive.org/web/20160303194821/http://www.spaceflightnow.com/falcon/090112f9vertical/	archive-date=2016-03-03	access-date=2015-01-28	work=Spaceflight Now	location=Tonbridge, UK}}
Kennedy Space Center	LC-39A	Falcon 9 / Falcon Heavy	SpaceX built its second HIF on the Crawlerway leading to the Launch Complex 39A just outside of its perimeter. It can accommodate both Falcon 9 and Falcon Heavy. It is able to support 5 boosters side by side. Inside the HIF the Falcon 9 / Falcon Heavy rockets are assembled and the payload, encapsulated in the fairing is connected to the rocket.	[[File:SpaceX HIF at KSC LC-39A (27550168066).jpg	frameless	100px]]
Kwajalein Atoll	Omelek Island	Falcon 1	A HIF has been built by SpaceX.	Exterior Interior
Vandenberg Air Force Base	SLC-6	Delta IV	A "cavernous" HIF exists. The HIF contains two bays that can accommodate the Delta IV and Delta IV Heavy.	Exterior	url=https://web.archive.org/web/20120516060116/http://www.aero.org/news/newsitems/vandenberg2-17-06.html	date=2012-05-16 }}, The Aerospace Corporation, 2006-02-17.
Wallops Flight Facility		Antares	HIF built by Orbital Sciences Corporation. The HIF is 250 ft long by 150 ft wide by 60 ft tall. It opened in 2011.	[[File:Antares A-ONE rollout 01.jpg	frameless	100px]]

HIF elsewhere

Most Russian, Ukrainian and former Soviet launchers are integrated horizontally, including Dnepr, Proton, Rockot, Shtil' and Soyuz. The Electron launch vehicle is also integrated horizontally and European Ariane 6 also uses HIF to integrate its rocket stack.

References

[http://spaceflightnow.com/news/n0311/19delta4heavy/ Heavy-lifting Delta 4 rocket to take test flight], Spaceflight Now, Justin Ray, 2003-11-19.
[http://www.globalsecurity.org/space/facility/ccas-lc-37.htm Complex 37], GlobalSecurity.org, John Pike, 2005-01-06.
Clark, Stephen. (2009-01-12). "New SpaceX Falcon 9 rocket tests its Cape Canaveral pad". Spaceflight Now.
[https://www.webcitation.org/5ko0wXd2o?url=http://www.geocities.com/launchreport/falcon9.html Space Launch Report: SpaceX Falcon Data Sheet], Ed Kyle, 2008-12-02.
[http://www.spacex.com/Falcon1UsersGuide.pdf Falcon 1 Users Guide (Revision 7)] {{webarchive. link. (2012-02-22 , SpaceX, 2008-05-15, page 35.)
[http://www.aero.org/news/newsitems/vandenberg2-17-06.html Launch Facility Profile: Vandenberg Air Force Base] {{Webarchive. link. (2012-05-16 , The Aerospace Corporation, 2006-02-17.)
[http://forum.nasaspaceflight.com/index.php?topic=15457.0 Taurus II Development News], NASASpaceFlight.com Forums, Reply #7, Antonioe, 2009-01-09.
"Press Release: NASA Ushers In New Space Exploration Era At Wallops Flight Facility". NASA.
[http://www.aiaa.org/pdf/conferences/Steffy_NRO-AIAA_Conference_Paper--Steffy.pdf Development Status of a Medium-Class Launch Vehicle for ISS Cargo and Satellite Delivery] {{webarchive. link. (2011-06-16 , David Steffy, Orbital Sciences Corporation, 2008-07-15, page 9.)

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