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Wind uplift components are derived from user input uplift loads at the same building level as the hold-down location. They arrive at the hold-down location by two different routes:
- The contribution to the overturning moment due to uplift loads over the sheathing segment adjacent to the hold-down location
- The uplift load over top of the adjacent opening is distributed to the opening support at the hold-down location
Uplift load components are not calculated if there is no wind shear overturning component at a location, as there is no need for a hold down at these locations.