New calculation introduced in the April ‌2023 Engineering Library update which is tailored for designing common substructures. The calculation can be used to design any basement wall, from a small residential basement to a multi-story underground parking garage. This calculation considers common basement wall conditions that the standard Retaining wall analysis & design (ACI318) calculation does not. This includes axial and moment loading from the superstructure, lateral wind loading on the exposed wall, a single or double layer of stem reinforcement, and a pinned or fixed support condition at the base of the stem. This calculation also includes the features available in the standard Retaining wall analysis & design (ACI318) calculation, such as determining soil loads, seismic lateral loading, and design of a supporting strip footing.

• The basement wall may be subject to vertical loads and moments from the structure above (dead, live, live roof, rain, snow, wind & seismic). It may also be subject to surcharge loads (dead, live) applied to the top of the retained soil, lateral earth pressures and wind loads.
• The basement wall may be subject to additional vertical loads and moments at an intermediate support should an intermediate slab be defined.
• Predefined load combinations are provided for the following codes:
  • Minimum Design Loads for Buildings and Other Structures (ASCE7-16 & ASCE7-10)
  • International Building Code (IBC 2021, IBC2018 and IBC 2015)

Video demonstration