Computations & Graphics, Inc.



Real3D (formerly Real3D-Analysis) is a powerful structural design / finite element analysis software designed for structural engineers of all skill levels. The software is reliable, easy to use, and affordable. It is designed for accuracy and simplicity in mind, allowing engineers to get the job done without being overwhelmed by useless features. It is available in version optimized for either 32 bit or 64 bit, and features unique 128-bit floating point (quad-precision) solver, which is able to handle numerically challenging structures. It incorporates a blazingly fast sparse solver, able to solve very large models with millions of degrees of freedom. Other key features include spreadsheet input and output, easy to use command line input, as well as compelling graphics display built upon industry standard OpenGL(R).

Since its inception in 2002, Real3D has been licensed and sub-licensed to hundreds engineering offices in the United States and around the world. We offer various license options, including complete source code licensing. We understand you have many choices in selecting your structural software, so ask yourself this question: "Why would I pay more for something that is less accurate and more difficult to use??"


Demo Video


P-Delta Analysis of Portal Frame Real3D-Example-4.wmv (24 MB)


What our clients are saying:

We are a small office with a wide range of projects so our use of Real3D is occasional. However, the graphical spreadsheet and graphical format make this an easy program to use. Over the years the improvements have added additional capability that often comes in handy. I like this program because of its ease of use, the computation speed and its ease of use whenever I need this capability. Of all of the programs like this that I have used I find that this software permits the most cost effective use of my time and the special features of this software are available for use as refinements on the initial analysis. I highly recommend its use offices of any size.

- N. B. Mitchell, Jr. P.E. S.E.

Real3D is a lot faster than many famous structural software (like 13 seconds vs. 1+ minutes for others for the same tank structure). Using the sparse solver on another large model with 5222 nodes and six p-Delta load combinations, it only took 32 seconds. I was surprised. It's very fast.

- Mr. B. Evangelista



  • 2D and 3D frame (beam and truss) elements, with linear, tension-only or compression-only options
  • 2D and 3D four-node plate/shell element, with thick or thin plate bending element (for slab modeling) and compatible/incompatible in-plane stress element (for shear wall modeling)
  • 3D eight-node solid (brick) element with compatible and incompatible formulations
  • Linear, compression-only, tension-only nodal, line and surface spring elements
  • Moment releases on frame element
  • Rigid offset and rigid links
  • Forced displacements on supports
  • Rigid diaphragms in any orientations
  • Multi-DOF constraints including inclined rollers, equal constraints etc.
  • Nodal, point forces and moments, line and surface forces, self-weight, area loads, thermal loads, pattern loads, and moving loads

Analysis and Design Options

  • Static linear analysis.
  • Geometric nonlinear (P-Delta) analysis.
  • Frequency analysis.
  • Response spectrum analysis.
  • Standard 64-bit floating point (double-precision) skyline solver and unique 128-bit floating point (quad-precision) skyline floating point solver (extremely accurate for "numerically challenging" models).
  • Sparse solver (in-core and out-of-core) is able to solve very large models with millions of degrees of freedom.
  • Concrete design for beams, columns, and slabs according to ACI 318-2002, -2005, -2008, -2011, and -2014. It includes such as features as exact biaxial column interaction diagrams, automatic moment magnification, cracked section properties, Wood-Armer moments, color coded plots for member capacity, and reinforcement contour plots for plates.
  • Steel design according to AISC 14th Edition (360-10) LRFD. It features step-by-step calculation procedures for each design choice.

User Interface Features

  • Multiple documents may be opened at the same time; each document may have multiple views with different display settings.
  • Spreadsheets for input data and results.
  • Graphically drawing nodes, frames and finite elements via mouse click or keyboard in command window.
  • Quality 3D graphical rendering built on OpenGL(R) with hidden line or surface removal. Graphics display includes loading diagram, moment and shear diagrams for beams, contours for shells and solids, deflection diagram and annotations for input and results.
  • Powerful automatic model generations for continuous beams, 2D and 3D frames, 2D and 3D shells, arc beams, and non-prismatic beams. Include AISC steel shape database, ASTM rebar database, regular sections and standard load combinations.
  • Flexible editing features such as undo/redo, duplicate, array, move, scale, delete, revolve, extrude, splitting beams, sub-mesh shells, and node and element merging.
  • Many different selection methods such as window/point select, select by IDs, select by properties, with options to freeze or thaw parts of a model. Ability to pan, zoom, and rotate in real time.
  • Ability to append one or more input files.
  • Text and graphic report in html format. Graphic report may contain multiple images. Text report may be saved in plain text format.
  • Ability to activate/inactivate elements and include/exclude gravity at element level.
  • Print previews for graphics and text reports.
  • Ability to import from and export to DXF files.
  • Ability to import / export AISC steel shapes from/to a comma delimited (csv) file.
  • English or Metric units, or combination of the two.
  • True 32-bit and 64-bit, fully integrated Windows application, professionally written from the ground up in standardized, object-oriented C++ programming language, resulting in a truly robust software tool for the engineering community.

System Requirements


Operating System: Windows Vista, 7, 8 and 10