Civil and Structural engineering

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Design code facilities

Two software options allow for design checking of members in steel and reinforced concrete frames.

Steel Frame Design 

The Steel Frame Design software option provides full details of all calculations made, referencing all relevant clauses and equations from a design code, and gives a step-by-step calculation transparency normally only found in simple frame analysis software. 

  • View results as Utilisation ratios on the model, or as a tabular summary for selected members and loadcases.  
  • Add results to a model report and see them automatically updated each time a report is generated to match the current state of the model.

Design codes supported include:

  • AASHTO LRFD 7th Edition (2014)
  • AASHTO LRFD 8th Edition (2017)
  • ANSI / AISC-360 (2016)
  • AS 4100-1998 Steel Structures (Australia)
  • BS5400-3 2000
  • CSA S6-14 Canadian Highway Bridge Design Code
  • EN1993-1-1: 2005+A1:2014 and EN1993-2: 2006
  • GB50017-2017

with more being added with each release.

Produce a tabular summary of design check results for selected members and loadcases. Save results for use with Microsoft Excel or other formats. Add results to a model report.

Generate formatted design report to investigate the design calculations carried out for particular members, showing the calculations made and referencing clauses and equations from the code. Add formatted design reports to a model report.


RC Frame Design

Use the RC Frame Design software option to carry out checking of reinforced concrete members subject to bending and axial force at Ultimate Limit State (ULS) and Serviceability limit states (SLS). Regular, arbitrary shaped, tapering and voided members are supported. 

  • View results as Utilisation ratios on the model, or as a tabular summary that allows drilling-down into detailed results and creation of interaction diagrams for selected members and locations. 
  • Add results to a model report and see them automatically updated each time a report is generated to match the current state of the model.

Design codes currently supported:

  • AASHTO LRFD 8th Edition (2017)
  • AS5100.5:2017 
  • CSA S6-14 
  • EN1992-1:2004
  • EN1992-2:2005
  • IRC:112-2011

with more being added with each release.


RC slab / wall design

Use the RC slab / wall design facility to analyse reinforced concrete slabs and walls, without prestressing, modelled using plate or shell elements. Obtain contour plots and values that indicate flexural reinforcement requirements at Ultimate Limit State (ULS), and calculate design crack widths at Serviceability Limit State (SLS) for those design codes that support this. Codes currently supported include:

  • AASHTO LRFD 7th, 6th, 5th Editions
  • AS5100-5-2004, AS3600-2009
  • BS5400-4, BS8007:1987, BS8110-1:1997 & BS8110-2:1985, BS EN1992-2:2005/NA:2007, BS EN 1992-1-1:2004/NA:2005
  • CAN/CSA S6-06, S6.1-06
  • Eurocode EN1992-1-1 and EN1992-2
  • GB 50010-2010
  • IRC: 112-2011, IRS: CBC-1997
  • SS CP65: Part 1 and 2: 1999, SS EN1992-1-1/NA 2008 Amd 1.


Concrete creep and shrinkage

Concrete creep and shrinkage is calculated in accordance with:

  • AASHTO LRFD 7th Edition 

  • CEB-FIP Model Code 1990 

  • EN1992-1-1:2004 Eurocode 2 

  • IRC:112-2011

  • User - allows user-defined parameters to be specified


Prestress and post tensioning

Tendon forces are calculated in accordance with:

  • AASHTO LRFD 2nd Edition
  • AASHTO LRFD 5th to 7th Edition
  • BS5400-4:1990
  • CEB-FIP Model Code 1990
  • DD EN1992-1-1:1992 Eurocode 2
  • EN 1992-1-1:2004 Eurocode 2
  • fib Model Code 2010
  • JTG D62-2004
  • JTG 3362-2018

See Load types and combinations for more information.


Tendon properties

Tendon properties for which prestress calculations will include time dependent effects for any stage of construction include:

  • AASHTO LRFD 5th to 7th Edition
  • CEB-FIP Model Code 1990
  • EN 1992-1-1:2004 Eurocode
  • fib Model Code 2010
  • IRC:112-2011
  • JTG 3362-2018

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Any modelling, design and analysis capabilities described are dependent upon the LUSAS software product, version and option in use.