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Sizer now allows you to apply an eccentricity proportional to the width or depth of the column, rather than an absolute value, to deal with uncertainty as to where the load will actually bear on the column.
Member Types
This applies to both columns and wall studs, with the eccentricity for wall studs restricted to the wall depth direction only.
Settings Input
A setting has been added to the Design Settings for the percentage of the member width or depth to apply as axial load eccentricity to those columns that use auto-eccentricity, with a default of 16.7% = 1/6 of member dept, an amount commonly used.
Load View Input
A checkbox indicates whether this eccentricity is to be applied to all axial loads in the direction of the load face selection. If checked, the word “Auto” shows up in the eccentricity input, which is disabled. “Auto” also shows up in the loads list.
Design
Known Section Size
For a known section size, the program applies an eccentricity of the percentage entered in the setting of the member width or depth, according to the Load Face selected in Column Loads view.
Unknown Design
When cycling through sections for unknown design, the program re-analyses the member to determine the new bending stress and combined combined axial and bending results based on the eccentricity for each new section width or depth.
Output
Design Summary
In the Design Summary, for unknown section size, the program shows Auto in the Eccentricity column of the load list. For known section size it shows the calculated eccentricity.
Design Check
In the Design Check output, where the section size is known, the program shows the calculated eccentricity using the proportion input in the settings.