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Important Note – These are descriptions to changes implemented in WoodWorks Shearwalls for version 9.3 and may not reflect current program behaviour.
The program would sometime take portions of low-rise wind loads generated for one corner load case and assign them to another corner load case, creating duplicate loads for one case and gaps in the other case. This was most likely to occur if the structure is heavily indented, and has been corrected.
The program now shows the location of the center of loads and the center of rigidity of the structure, for both wind and seismic loading. These appear in Load Generation action when Rigid forces are chosen for display. Two small dots with the symbols CL and CR appear.
You can turn on and off the display of these points using the Show menu.
The distance between these points in each direction is the moment arm used for torsional analysis for rigid diaphragm distribution.
When adding a new C&C load, it is now possible to select "Both ways" for wind direction, as the program now distinguishes between suction C&C loads for both nail withdrawal and sheathing strength, and bearing wind loads which impact sheathing strength only. .
Starting with version 9, after entering a C&C wind load in Load Input form, and if there are no generated loads, the program would crash upon exit from the dialog. This has been corrected.
The following corrections have been made to the Add a New Load dialogue box:
When Wind C&C is selected,
When Apply to… Selected Walls was selected, the From and To location did not update properly so that the load would not be applied to just the extent of the selected wall.
You can no longer apply dead load and building mass loads to an entire building face. These loads are more appropriate to a wall line
For wind shear and seismic loads the Element was always shown to be Face even when applied to a wall line. It now shows the wall line it was added to.
The list of input loads has been widened to show the Profile column without scrolling.
When the Design Setting was set to exclude deflection analysis, the shear flow arrows for diaphragm shear and base shear and the segment shear force arrows did not show up in elevation view. This has been corrected.
Under Seismic Loads in the Generate Loads dialog, the note giving the percentage of snow load used was missing. It has been restored to the program.
Generating low-rise wind loads on a structure with a flat roof would sometimes show nonsensical output in the log file for the rigid distribution torsional forces for low-rise case B wind loads. As these cases have a net zero wind load in the direction with nonsensical output, this did not affect design. It has been corrected
The Design Setting which indicated whether the structure height to width ratios are based on a single block or multiple blocks has been removed from the program, as it had no effect. This setting had been put in the program as part of ongoing development to implement multi-block low rise procedures; however, this feature has not yet been released.
The following changes have been made to the Design Results output pertaining to wind and seismic load generation site information:
For design method, the USA ASCE 7 seismic load generation procedure was showing, and for wind, the "N" was missing from NBC. These problems have been corrected and the program now shows the full NBC procedure for both.
For wind design, the program was showing the choice of low rise (Fig. I-7/8) or all-heights (FigI-15), but that information is also in the Design Settings output. Instead, in the Site Information the program now shows Static Procedure from NBC 4.1.7.
CGI has changed to Cgi.
The following changes have been made to the log file showing detailed wind and seismic load generation information:
Pressing log file button for a new project displayed the results from the last unsaved session. The log file button is now enabled until loads have been generated.
The following changes have been made to the log file header block:
Since the log file was placed in a viewer within the Shearwalls program with version 9.0, page numbers no longer appeared. This has been corrected
The log file was designed to be shown in Windows Notepad, which has a tab width of 8. The new internal text viewer uses a tab width of 6, so some output tables were misaligned with their headers. Tab stops have now been replaced by spaces to avoid this problem.
The references to NBC design code clauses now follow the format NBC uses when referring internally to other sections of the publication, e.g. 4.1.7.1.(6)(c) . Previously there had been inconsistent formatting.
The formatting of fractional exponents in equations has been changed from fractional to decimal to conform with NBC formatting, e.g. (h/10)^1/5 is changed to (h/10)^0.2
Information in the log file site information and definitions legends that was previously separated by semi-colons has been placed on a separate line for readability
Where a subsection of the report contains more than one simple table, a blank line has been placed after the heading to the subsection to indicate that all the information below it pertains to that heading.
The following changes have been made to the legend to the wind load section of the log file
The reference to the equations for exposure factor Ce from the NBC has been made more exact, changing 4.1.7.1 5) to 4.1.7.1.(5)(a). and 4.1.7.1.(5)(b). for open terrain and rough terrain respectively.
Main Wind Force and C&C loads have been split into separate tables for readability. Previously there were two sets of headers for the tables and you had to correlate information for the type of load being read with the correct header line.
The internal exposure and gust co-efficients Cei and Cgi are now output to 2 decimal places instead of 1, similar to Ce and Ci.
The design code clause reference has been added to the seismic design method shown in the header to the section on seismic load generation, and the redundant output of 2 lines repeating the NBC design code under the seismic site information have been removed.
The following changes have been made to the echo of the user-input Site Information
The output of Site Information for seismic load generation has been made consistent with wind by removing the words "User Input" and placing it first in the sequence of information reported.
Risk in the seismic Site information section has been renamed Importance category and moved to be adjacent to the Importance Factor Ie.
The extra spaces before the output of Fv in the seismic Site Information have been removed.
The following changes have been made to the Symbols section for seismic load generation
The following changes have been made to the Equations section for seismic load generation:
The following changes have been made to the Calculation of Design Base Shear section:
The Distribution of Base Shear to Stories table often appeared in a puzzling, ragged format because an earlier format with the stories arrayed horizontally was shown along with the current format with the rows arranged vertically. This has been corrected, and the following changes have also been made: