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C11: Rectangular Column Design

Ver. 3.0.11 2017/04/04
  • ACI318 - 2014 design code addded.
Ver. 3.0.10 2017/01/04
  • Corrected sizing of column section picture in calcsheets.
Ver. 3.0.09 2016/09/28
  • Fixed visibility of numbers in grid relating to ACI code parameters.
Ver. 3.0.08 2016/08/02
  • Added minimum eccentricity checks as per Eurocode section 6.4.
Ver. 3.0.07 2016/07/21
  • Corrected calcsheet output for biaxial moment interaction formulas: Euro and Australian codes.
Ver. 3.0.06 2016/04/06
  • Compatibility problem with large fonts, fixed.
Ver. 3.0.05 2016/03/15
  • Adjusted usage of 'n' when evaluating slenderness and negative axial forces using Eurocodes. n limited to 0.01.
Ver. 3.0.04 2016/01/29
  • Corrected critical section sometimes indicated for incorrect position on the column.
Ver. 3.0.03 2016/01/12
  • Corrected divide by zero error: occurs when using Eurocode and zero axial force.
Ver. 3.0.02 2016/01/06
  • Occasional range check error during start up, fixed.
Ver. 3.0.01 2015/12/09
  • Correction of licensing error introduced by maintenance release.
Ver. 3.0.00 2015/12/01
  • Major release.
  • Implemented new user interface library.
Ver. 2.6.18 2015/09/16
  • New ribbon format implemented.
  • Corrected Madd calculation in calcsheets for Hong Kong code.
  • Corrected ACI codes: reinforement too high with low axial force and high moments.
Ver. 2.6.17 2015/07/24
  • Corrected summary of load cases table on the calcsheets - the area and % reinforcement values.
Ver. 2.6.16 2015/06/19
  • Added support for New Zealand concrete design code NZS 3101 - 2006.
Ver. 2.6.15 2015/04/13
  • Fixed 'dive by zero' problem when using tensile forces in Eurocode 2.
Ver. 2.6.14 2015/04/07
  • Dimensions added on section diagram.
Ver. 2.6.13 2015/03/25
  • Corrected % rebar required for biaxial bending using Eurocode. Was under estimated in some cases.
Ver. 2.6.12 2015/03/19
  • Areas of bar sizes suggested adapted for nominal values as used in Australian codes.
Ver. 2.6.11 2014/07/18
  • Corrected moment addition, bottom of column for unbraced columns.
Ver. 2.6.10 2014/05/05
  • Range check error fixed, Eurocode option.
Ver. 2.6.09 2014/04/07
  • Added Hong Kong - 2013 design code.
Ver. 2.6.08 2014/02/19
  • Fixed behaviour when executing program with a parameter string, e.g. opening a data file from Windows Explorer.
Ver. 2.6.07 2014/01/07
  • Corrected output for Eurocode 2 - 2004: moments resulting from imperfections now added to other moments, not used as minimums only.
Ver. 2.6.06 2013/12/02
  • Corrected values in summary tables for reinforcement about second axis when using Eurocode, ACI, Australian and Indian codes - was reported as the same as the main reinforcement.
  • Added ability to save default end conditions and effective lengths.
Ver. 2.6.05 2013/11/25
  • Corrected range check error that was introduced in version 2.6.04.
Ver. 2.6.04 2013/11/25
  • Correction to reinforcement output for Eurocode 2 - 2004.
Ver. 2.6.03 2013/11/14
  • Send to Calcpad function fixed.
Ver. 2.6.02 2013/11/07
  • Corrections to Eurocode 2 - 2004 output.
Ver. 2.6.01 2013/06/12
  • Corrected number of bars on schedule for type 3 stirrups.
Ver. 2.6.00 2012/12/05
  • Major release.
Ver. 2.5.19 2012/11/21
  • Corrections and improvements to calcsheets.
Ver. 2.5.18 2012/11/01
  • Corrected bottom bending moments for case: unbraced about Y-Y axis, bending only about Y-Y axis.
Ver. 2.5.17 2012/10/26
  • Improved presentation of rebar required data about both axes on the design page.
Ver. 2.5.16 2012/10/25
  • 'Required' field on BS page for rebar in other direction: further adjustments made.
Ver. 2.5.15 2012/10/16
  • Added ACI318 - 2011 design code.
  • 'Required' field on BS page for rebar in other direction: now use the maximum value for all cases.
Ver. 2.5.14 2012/09/14
  • Improved design code selection dialogue box with large fonts display setting.
Ver. 2.5.13 2012/04/19
  • Rebuild to correct line spacings in output tables.
Ver. 2.5.12 2012/01/09
  • Recompile to address I/O 103 errors occurring.
  • Adjusted bending schedule to be more clear for stirrup type 1 and numerical bar marks.
Ver. 2.5.11 2011/10/04
  • Disabled design windows on errors.
Ver. 2.5.10 2011/10/04
  • Added error message if no. of load cases exceeds 5000.
Ver. 2.5.09 2011/09/01
  • Corrected link bar designation on bending schedule and sketches - defaulted to general setting.
Ver. 2.5.08 2011/08/12
  • Corrected "Send to Calcpad" function.
Ver. 2.5.07 2011/08/01
  • Corrected addition of slenderness moments for cantilever columns - Old British and derived codes.
Ver. 2.5.06 2011/06/21
  • Added critical load case and reinforcement for secondary direction of bending.
Ver. 2.5.05 2011/06/10
  • Added error message for condition N > 0.75*Pc for American, Canadian and Australian codes.
Ver. 2.5.04 2011/03/22
  • Correction in design calculation shown on calcheets for bi-axial design of symmetrical columns with symmetrical moments. Calculations would show incorrect primary design axis; summary table was correct.
Ver. 2.5.03 2011/01/26
  • Added A23.3-4 (2010) code. Refinements to detailed output.
Ver. 2.5.02 2010/08/25
  • Corrected problem with long load case names.
Ver. 2.5.01 2010/08/13
  • Added AS3600 - 2009 (Australian) code.
  • Mild steel bar designation aligned with global preferences.
Ver. 2.5.00 2010/07/05
  • New Release.
Ver. 2.4.15 2009/12/03
  • Corrected number of links on bending schedule for type 4 links.
Ver. 2.4.14 2009/07/10
  • Minor bug fixes: Eurocode, ACI code and detailed output.
  • Removed Eurocode 2 - 1992.
Ver. 2.4.13 2009/07/07
  • Added Eurocode 2 - 2004.
  • Added detailed equations in output.
  • Corrected biaxial momet calculation in IS456 code.
Ver. 2.4.12 2009/03/27
  • Corrected column moment output in calcsheets for British and derived codes - did not always tally with graphical output.
Ver. 2.4.11 2009/02/20
  • Range check error fixed.
Ver. 2.4.10 2009/02/19
  • Tie link bar designation changed from always "R".
Ver. 2.4.09 2009/02/04
  • Range check error fixed.
Ver. 2.4.08 2009/01/27
  • Recompiled for compatibility with user configurations.
Ver. 2.4.07 2009/01/19
  • Range check error fixed.
Ver. 2.4.06 2008/11/24
  • Correction for additional moments at centre of column in case where column pinned at both ends: AS3600 and ACI318 codes.
Ver. 2.4.05 2008/09/22
  • Corrected output for phi*Mub in calcsheet for AS3600 code.
Ver. 2.4.04 2008/09/08
  • Changed Calcsheet output of '0.95fy' in BS8110 - 1997 code to read '0.87fy' when fy>=500 MPa. Calculations were correct.
Ver. 2.4.03 2008/06/13
  • Corrected slenderness moments for Eurocode 2.
Ver. 2.4.02 2008/05/06
  • Fixed bar marks of middle stirrups in generated bending schedule.
Ver. 2.4.01 2008/04/01
  • Fixed display of scroll values on graphs.
Ver. 2.4.00 2008/03/25
  • Maintenance release.
Ver. 2.3.08 2007/10/15
  • Added 3D view on bending schedule tab.
Ver. 2.3.07 2007/10/01
  • Changed level output on bending schedule to 3 decimal places if levels are in m.
Ver. 2.3.06 2007/08/31
  • Corrected graphs for maximum axial load capacity - was underestimated.
Ver. 2.3.05 2007/07/18
  • Corrected selection of critical section if reinforcement is nominal at top middle and bottom of column.
Ver. 2.3.04 2007/05/14
  • Program now designs for minimum moment about each axis separately.
Ver. 2.3.03 2007/04/11
  • Resized output table in calcsheet to show larger reinforcement values.
Ver. 2.3.02 2007/04/11
  • Mimimum moment only applied about weakest axis if there are no other moments.
Ver. 2.3.01 2007/04/10
  • Generation of bending schedules update to new Padds format.
Ver. 2.3.00 2007/03/12
  • Prokon Ver 2.3.00.
Ver. 2.2.10 2007/02/06
  • Added ACI 318 - 2005 code.
Ver. 2.2.09 2006/11/30
  • Corrected picture on B.S. page. Bar indication for vertical bars omitted bars if column not continuous and no X-X middle bars present.
Ver. 2.2.08 2006/10/10
  • Fixed error on calcsheets - final design axis graph always given as about X-X axis.
Ver. 2.2.07 2006/07/31
  • Fixed bending schedule with link type 2.
Ver. 2.2.06 2006/05/21
  • Fixed bug where to many stirrups were generated in schedule if more than one internal stirrup in X-ditrection in column.
Ver. 2.2.05 2006/04/20
  • Fixed problem where all load cases were added together as one.
Ver. 2.2.04 2006/04/10
  • Fixed problem where negative reinforcement is displayed with in second direction - occurred with low axial loads.
  • Improved generation of default reinforcement.
Ver. 2.2.03 2006/03/30
  • Fixed divide by 0 error.
Ver. 2.2.02 2006/03/27
  • Minimum moment applied about both axes for calculation of reinforcement.
  • Can now save bending schedule data with input file.
Ver. 2.2.01 2006/02/18
  • Maximum number of load cases increased from 50 to 200.
Ver. 2.2.00 2005/12/15
  • Maintenance release.
Ver. 2.1.08 2005/06/30
  • Calculations for slenderness moments refined for ACI, Canadian and Australian codes.
Ver. 2.1.07 2005/03/08
  • Australian code added.
  • Biaxial moment design corrected (design moment M' not calculated correctly in version 2.1.06).
Ver. 2.1.06 2005/03/15
  • Access violation when generating bending schedule fixed.
Ver. 2.1.05 2005/02/03
  • Design for slenderness in ACI code adjusted.
  • Concrete Society report TR49 provisions for high strength concrete incorporated.
  • Hong Kong Concrete Code - 2004 added.
Ver. 2.1.04 2004/11/25
  • Minor adjustments to Indian code provisions.
Ver. 2.1.03 2004/11/11
  • Nominal steel for Indian code set to 0.8% (Not 0.4%).
Ver. 2.1.02 2004/11/10
  • Indian code added.
Ver. 2.1.01 2004/10/05
  • Can limit maximum size of bars using preferences setting in Calcpad.
Ver. 2.1.00 2004/09/14
  • New version.
Ver. 2.0.02 2003/12/12
  • Column moments were only redrawn when scrolling.
  • load input if load cases were numerical.
Ver. 2.0.01 2003/10/24
  • Now uses Windows Padds for generating schedules.
  • Full schedule is now displayed.
Ver. 2.0.00 2003/08/05