Operations and Checkout (O&C) Building Floor Plan Map to Facility O&C Facility Handbook (pdf)

Facility	# P/L's at one time	Processing Space, WxLxH	Clean Room Class	Door Size	Hoisting Equipment, Tons & Max Hoisting Height	Control Room Size, Sq Ft	Haz Ops Cap
Operations and Checkout (O&C) Building	Integ Facility	Airlock: None Highbay: 38'5"x175'x104' Lowbay: 85'x475'x70'	Airlock: N/A Highbay: 100,000 Lowbay: 100,000	Airlock: N/A Highbay: 40'x80' Lowbay: N/A	Airlock: N/A Highbay: 27.5 Ton Bridge (+ Lowbay Cranes) 82'3.5" HH Lowbay: Qty 2, 27.5 Ton Bridge 47'9.5" HH	Shared Use	Non Haz

The Operations & Checkout Building (O&C) is a five story facility containing over 600,000 square feet of offices, laboratories, astronaut quarters and payload processing areas. The O&C Building was originally built to assemble and test the spacecraft of the Apollo Program, but was modified to allow processing of Spacelab and other horizontally processed payloads for the Space Shuttle Program.

Spacelab payloads and their associated elements are received, assembled, and tested in the O&C Building before moving to either the Orbiter Processing Facility (OPF), for insertion into the Space Shuttle orbiter, or to the Vertical Processing Facility (VPF), to be combined with vertically processed payloads.

Laboratories and other offline processing areas are present for the processing of smaller payload elements such as orbiter Middeck experiments or individual Spacelab experiments.

The building is split into two main wings, North and South. The North wing houses most of the facility's office space while the South wing houses the payload processing areas, control rooms, and logistics areas.

The O&C Building is located east of the Kennedy Space Center Headquarters Building on NASA Causeway.