Accurately calculating lateral forces plays a vital role in the safe design of structural walls, especially in areas subjected to wind and earthquake effects. This Excel sheet has been formulated to estimate lateral forces acting on one-story walls per the International Building Code (IBC 2006). It presents complex code-based operations in a clear and accessible format for engineers, architects, and construction specialists.
Lateral Forces on One-Storey Structures
One-storey structures — including warehouses, retail buildings, industrial sheds, and residential homes — are designed under the assumption that all lateral force is resisted at a single diaphragm level (the roof) and transferred to the lateral force resisting system (LFRS). The LFRS typically consists of shear walls, braced frames, or moment frames.
Under IBC 2006, lateral forces arise from two independent sources that must be considered separately and in load combinations:
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