An assembly transport system (10, 10A) for use in assembly or logistics operations, the transport system comprising: a transport device (14, 14A, 14B) operable to transport a workpiece along a path of travel in communication with a workstation, the transport device further comprising: a frame comprising: a pair of side walls separated along a Y-axis; and a cross-member connected to the pair of frame side walls, the frame side walls and the cross-member defining a clearance opening having a clearance opening width along the Y axis and a clearance opening height along a Z axis through the transport device along a X axis; a drive system connected to the frame, the drive system operable to selectively move the transport device along the path of travel; a manipulator device (104, 104A) supported by the frame, the manipulator device movable relative to the frame; a carrier connected to the manipulator device operable to support a workpiece transported by the transport device; a sensor (140, 140A) connected to the frame operable to assist in navigating movement of the transport device along the path of travel; a control system in communication with the sensor, the drive system and the manipulator device, the control system operable to autonomously or semi-autonomously move and navigate the transport device along the path of travel and the manipulator device relative to the frame; characterised in that it further comprises a second build device positioned along the path of travel at the workstation, the second build device comprising: a second build device width and a second build device height which are each less than the transport device clearance opening allowing second build device to pass through the transport device clearance opening on passage of the transport device through the workstation. a transport device (14, 14A, 14B) operable to transport a workpiece along a path of travel in communication with a workstation, the transport device further comprising: a frame comprising: a pair of side walls separated along a Y-axis; and a cross-member connected to the pair of frame side walls, the frame side walls and the cross-member defining a clearance opening having a clearance opening width along the Y axis and a clearance opening height along a Z axis through the transport device along a X axis; a drive system connected to the frame, the drive system operable to selectively move the transport device along the path of travel; a manipulator device (104, 104A) supported by the frame, the manipulator device movable relative to the frame; a carrier connected to the manipulator device operable to support a workpiece transported by the transport device; a sensor (140, 140A) connected to the frame operable to assist in navigating movement of the transport device along the path of travel; a control system in communication with the sensor, the drive system and the manipulator device, the control system operable to autonomously or semi-autonomously move and navigate the transport device along the path of travel and the manipulator device relative to the frame; characterised in that it further comprises a frame comprising: a pair of side walls separated along a Y-axis; and a cross-member connected to the pair of frame side walls, the frame side walls and the cross-member defining a clearance opening having a clearance opening width along the Y axis and a clearance opening height along a Z axis through the transport device along a X axis; a pair of side walls separated along a Y-axis; and a cross-member connected to the pair of frame side walls, the frame side walls and the cross-member defining a clearance opening having a clearance opening width along the Y axis and a clearance opening height along a Z axis through the transport device along a X axis; a drive system connected to the frame, the drive system operable to selectively move the transport device along the path of travel; a manipulator device (104, 104A) supported by the frame, the manipulator device movable relative to the frame; a carrier connected to the manipulator device operable to support a workpiece transported by the transport device; a sensor (140, 140A) connected to the frame operable to assist in navigating movement of the transport device along the path of travel; a control system in communication with the sensor, the drive system and the manipulator device, the control system operable to autonomously or semi-autonomously move and navigate the transport device along the path of travel and the manipulator device relative to the frame; characterised in that it further comprises a second build device positioned along the path of travel at the workstation, the second build device comprising: a second build device width and a second build device height which are each less than the transport device clearance opening allowing second build device to pass through the transport device clearance opening on passage of the transport device through the workstation.