Editing Space Shuttle external tank (section)

===Intertank===<!-- This section is linked from [[STS-51-L Mission timeline]] -->
The intertank is the ET structural connection between the LOX and LH<sub>2</sub> tanks. Its primary functions are to receive and distribute all thrust loads from the SRBs and transfer loads between the tanks.

The two SRB forward attach fittings are located 180° apart on the intertank structure. A beam is extended across the intertank structure and is mechanically fastened to the attach fittings. When the SRBs are firing, the beam will flex due to high stress loads. These loads will be transferred to the fittings.

Adjoining the SRB attach fittings is a major ring frame. The loads are transferred from the fittings to the major ring frame which then distributes the tangential loads to the intertank skin. Two panels of the intertank skin, called the thrust panels, distribute the concentrated axial SRB thrust loads to the LOX and LH<sub>2</sub> tanks and to adjacent intertank skin panels. These adjacent panels are made up of six stringer-stiffened panels.

The intertank also functions as a protective compartment for housing the operational instrumentation.