%0 Manual %G English %T Design modes %U https://www.arlis.org/docs/vol1/AlaskaGas/Manual/Manual_NAPC_1984_PipelineDesignCriteriaManualSection13.pdf %7 Array %X Section 13 provides a broad spectrum of mode concepts developed to demonstrate how design criteria will be used to resolve site specific problems in pipeline construction. Descriptions are given for buried pipe in ditches and various soils, aboveground pipe in a berm, and stream crossings. Details for design mode selection are given for frost heave, soil data input, and procedures. Other design considerations include ditch plug design, ditch wall stability, chilled pipe effects, and transitions.