Integrated Truss Structure
Quick Facts
The Z1 truss segment was the first portion of the Integrated Truss Structure installed on the orbital outpost on Oct. 14, 2000.
The P6 truss segment, the second portion of the station’s Integrated Truss Structure, was installed on Dec. 3, 2000. It was later moved on Oct. 30, 2007.
The S6 truss segment, the final portion of the station’s Integrated Truss Structure, was installed on March 19, 2009.
The Integrated Truss Structure (ITS) is made up of 11 segments plus a separate component called Z1 that are attachment points for the solar arrays, thermal control radiators and external payloads on the space station. The solar arrays were also delivered with the S3/S4 and P3/P4 trusses. The radiators were delivered with the S1, S3, S6 and P1, P3 and P4 trusses.
The truss segments also contain electrical and cooling utility lines, as well as the Mobile Transporter rails. The ITS reaches 108.5 meters (356 feet) in length across the extended solar arrays.
Starboard “S” Truss segments: 6
Port “P” segments: 5
Zenith “Z” segments: 1
Mission Overview
Z1 Truss Installed: 10/14/00
P6 Truss-Solar Arrays: 12/3/00
S0 Truss: 4/11/02
S1 Truss: 10/10/02
P1 Truss: 11/26/02
P3/P4 Truss-Solar Arrays: 9/12/06
P5 Truss Spacer: 12/12/06
S3/S4 Truss-Solar Arrays: 6/11/07
S5 Truss Spacer: 8/11/07
S6 Truss-Solar Arrays: 3/19/09
