Key Benefits

  • Cantilever retaining walls
  • Gravity retaining walls (ACI Chapter 22 provisions)
  • Restrained walls (e.g. basement wall, propped cantilever)
  • Wall stems may be concrete or masonry (or mixed)
  • Wall stems may be tapered (battered) or stepped
  • Design checks for concrete or masonry
  • Wide variety of loading types

Building Code Support

  • IBC 2015, 2012, 2009, 2006
  • ACI 318-14, 318-11, ACI 318-08
  • MSJC 2013, 2011, 2008
  • CSA A23.3: 2004, 1994
  • ASCE 7 (Load Combinations) w/automatic vertical seismic component
  • AASHTO Earth Load Factors (optional)
  • Unreinforced stem (gravity wall) checked via unreinforced provisions of ACI Ch. 22
  • Unreinforced heel/toe checked according to ACI Ch. 22 (e.g. very short heel/toe)
  • Custom load combination sets can be entered (rather than just a single combination)
  • Masonry load combinations are fully exposed & customizable
  • Stability load combination is customizable

Geometry Inputs

  • Full gravity wall support: All components (stem/heel/toe) can be unreinforced
  • Footing bars auto-extend full width
  • Two curtains of reinforcement
  • Shrinkage & temperature reinforcement (for complete detailing, it is not 'checked')
  • Different f'c values for footing/stem
  • Different fy values for footing/stem
  • Different weight values for footing/stem (e.g. can model buoyancy in footing)
  • Option to "turn off" heel/toe reinforcing (checked as structural plain concrete)

Loads Inputs

  • Line/strip surcharge can be applied at a depth below backfill (e.g. for a buried footing)
  • At-rest earth pressure (frequently used for restrained walls)
  • Specify backfill depth from footing top or bottom (optional)
  • Specify the unit weight of the water in the backfill (so it need not be water)

Results Displayed

  • All resultant pressures on the wall are illustrated graphically, along with the underlying equations
  • Wall lateral displacement
  • All building code equations are displayed, worked out with project-specific values
  • Pictures of the wall, or of a relevant part of the wall, accompany many calculations
  • Building code provision displayed next to all checks
  • Transfer forces across stem joints.
  • Graphics plot of stem moment capacity and applied moment
  • Graphics plot of stem shear capacity and applied shear
  • Summary table of all checks including name, required value, provided value, required/provided ratio, and controlling load case

Reporting

  • Improved check summary table replaces previous poorly organized check displays
  • Job number input for display in report header
  • Detailed report including all design calculations & diagram
  • Concise summary report
  • Full-page drawing report with fully detailed drawing of wall cross-section and elevation
  • File name printed at the bottom of all report pages
  • Report headers display basic company information, plus project title, notes and job number
  • Your company logo displayed in report header (optional)
  • DXF file export

Calculations Exposed

  • Code provision reference printed with each group of equations
  • Explicit calculation & display of lateral pressures on the stem only
  • Table listing forces used in bearing force calculation
  • Clearer than old equations
  • Stem shear is graphed (illustrates shear @ section junctions)
  • Check summary side pane shows unity (required/provided) ratio
  • Check summary view has more information (e.g. controlling load combination)
  • Lateral support reaction prominently displayed right on-screen in force calculations
  • Checking of multiple load combinations now much more exposed
  • Bearing eccentricity check now calculates & displays actual e, allowable, & ratio
  • Development & lap lengths calculations are clearer and organized onto a dedicated tab

Engineering Options/Assumptions

  • Option to indicate sliding restrained by external entity (e.g. slab)
  • Option to include or neglect the bearing pressure beneath the heel for strength checks
  • Option to ignore stabilizing contribution from passive pressure @ toe
  • Options to include the vertical component of the backfill pressure for overturning, sliding, and bearing pressure checks (individual option for each)
  • Option to include surcharge forces in the sliding and overturning checks
  • Option to use surcharge forces for bearing pressure calculation
  • Option to neglect the weight of the soil over the toe
  • Option to factor earth weight as either dead load or earth load
  • Option to use toe passive pressure for bearing
  • User-specified coefficient of friction between footing & subgrade
  • User-specified wall friction angle (used if backfill pressure is calculated via Coulomb theory)
  • Automated Design Commands (Optional)
  • Automatically choose footing reinforcement
  • Automatically choose stem reinforcement
  • Automatically sets required bar embedment lengths and lap splice lengths
  • Automatically positions key to embed stem bars, also such that reinforces key
  • Automatically designs shear key to resist sliding
  • Specify preferences used in all design functions: which bars are available, which spacing to use, which length increments to consider, etc.

Project

  • Multiple projects in a file, organized in a tree on a "home" page
  • Menu to quickly create walls of a particular type (cantilever, restrained, gravity)
  • Have a 'Notes' page where you can enter project-specific comments (printed in report)

General Interface Features

  • Perpendicular wall view (much easier to see reinforcement layout)
  • Colors customizable (separate for screen & printout)
  • Hook extensions are displayed offset from bars they parallel (easier to see)
  • Equations improvements (square roots drawn, no bold braces, clearer font)
  • Stem sections are dimensioned and have improved labeling
  • Double-click to edit stem sections

Limitations (potential future features!)

  • Segmental/MSE walls
  • Multi-level basement walls (multiple lateral supports)
  • Soldier pile walls
  • Shrinkage/temperature reinforcing may be entered, but it is just for detailing, it is not "checked"
  • Rock anchors
  • Walls without footings
  • Walls on pile foundations
  • Counterfort walls
  • Strength design of masonry walls (currently only ASD)
  • Sheet pile walls
  • Multiple soil layers (other than a saturated layer beneath the water table)

Example Project Solved


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