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Blank Input for Wind Uplift Force Direction
Starting with version 8.1, we allow the wind uplift forces to be entered for each wind direction separately, but by default, when an uplift load was selected, nothing appeared in the wind direction box. If you proceeded to enter the loads without selecting a direction, or both directions, then the wind uplift did not get included in the combined hold-down forces, and the separate wind uplift component of the hold-down force that was shown in elevation view and in the output report was unreliable.
In addition, a load entered with blank direction showed up as blank in the Load Input dialog edit field, E->W in the load list, and Both directions in the load list in the output report. In fact it acted as none of these
The default showing in this box is now “Both Ways”, and it is never allowed to be blank.
Display of Uplift Loads Entered in Both Directions
If a selection was made for the wind direction before adding the load, the combined hold-down forces were correct; however the uplift component appeared in elevation view for both directions, when it shouldn’t have.
Different loads entered west to east and east to west (the usual case) were shown superimposed and thus garbled in plan view and in elevation view, along with the uplift components of the hold-downs.
These problems have been corrected.
Editing Wind Uplift Loads
The following problems in the Load Input screen used for editing existing loads were corrected:
All loads showed up in the load list as E->W, even if they were W-> E or Both Ways.
An E->W load selected showed the direction in the edit box as blank.