Need more?  Ask Us a Question

 

 

This module designs masonry columns that are subject to axial loads and lateral bending loads about one axis. The user can select ASD or LRFD methods.

 

All calculations are according to the ACI 530-05 code.

 

The screen capture below shows the full screen for masonry column design. See items below for descriptions of items that are specific to the masonry column design module.

 

For general description of the module, end fixity, loads, and load combinations click here. For slenderness description click here.

 

 

General Tab

The area circled in red below is specific to the masonry column selection. You have the choice of using Working Stress or Strength Design methods.

 

The column capacity is determined by creating a P-M interaction diagram, so that the effect of compressive force is included in the calculation of allowable moment capacity. For working stress this will result in significantly higher capacities than the older methods that calculated an actual stress ratio using (fa/Fa + fb/Fb).

 

 

 

 Here is the description when the Strength Design method is selected...

         

 

Masonry Tab

All of the information on this tab is specific to masonry column design.

 

The input items in the red bubble define the material properties of the column and reinforcing used.

 

The input items in the blue bubble let you define the cross section size, reinforcing, and orientation of the column.

 

Under Specify Column Dimensions we've made it easy by providing buttons for the common nominal dimensions of a masonry column. Click the Width and Depth buttons and you will see the actual dimension appear in the bottom of the area. Note that "Width" is parallel to the "x-x" axis and "Depth" is parallel to the "y-y" axis.

 

In the lower right you can specify the bar size and bar count to be used on each face of the column.

 

The graphic will change accordingly as your input changes.

 

 

Results Tab

 

 

Design Maximum Combinations

This tab summarizes the maximum stress ratios for each load combination.

 

 

A-M-V-D Results: Strength Combinations

This tab presents the very detailed allowable and actual values for each load combination.

 

 

A-M-V-D Results: Service Load Deflections

This tab summarizes the lateral deflections of the column at increments along its height. These values will be nonzero only if lateral loads are applied or the axial load is applied with an eccentricity.

 

 

P-M Surface Data

This tab lists the full analysis results for the column.

 

 

Reactions

This tab reports axial reactions and lateral reactions due to lateral loads or due to axial loads that have an eccentricity.

 

 

Sketch

 

A-V-M Diagrams

 

Pn-Mnx-Mny Diagrams