ASCE 7-22 Wind/Snow Load Combination Worksheet (Excel)

This Excel-based resource implements the mandatory load combination provisions in ASCE 7-22 Section 2.3 (Load Combinations for Strength Design) and Section 2.4 (Load Combinations for Allowable Strength Design/Serviceability), with particular emphasis on scenarios relevant to single-axis and dual-axis solar trackers. Unlike generic structural worksheets, it incorporates tracker-specific modifiers such as azimuthal wind directionality, tilt-dependent snow accumulation (per ASCE 7-22 Section 7.6), sliding snow effects, and dynamic wind pressure amplification factors for slender, rotating members. The worksheet typically employs user-input parameters—including basic wind speed (V), ground snow load (p_g), exposure category (B/C/D), importance factor (I_w, I_s), topographic factor (K_zt), and enclosure classification—to compute directional wind pressures (q_z, GC_p), balanced/unbalanced snow loads (p_s, p_f), and combined factored effects (e.g., 1.2D + 1.0W + 0.5S + 0.5L). It also embeds logic for load reduction per ASCE 7-22 Table 2.3-1 (e.g., reducing snow load contribution when wind is dominant) and accounts for non-simultaneity where permitted by commentary. Validation is supported through embedded error checks, unit consistency enforcement (US customary or SI), and traceable calculation steps aligned with ASCE 7-22 Annex C and NCEES Structural Engineering exam guidelines.