SkyCiv Section Builder

Comprehensive web-based section analysis software to analyze geometric, bending, shear and torsion section properties as well as FEA and reinforced concrete design.
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No Installations
Powerful FEM Analysis
Import CAD Models

SkyCiv Section Builder

Build your sections out of multiple shapes from templates, or define your own via points, line paths, or a DXF import from CAD! Model and analyse your sections faster than ever! The section builder calculates complex geometric parameters and performs stress analysis with an easy and intuitive, online interface.

SkyCiv Engineering Software is completely cloud based. This allows users to access their programs and files from a web browser, from anywhere, anytime! No need to install or update the program. This is a cost effective solution with no further costs such as maintenance or updates.

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Get started for free
SkyCiv Beam

Discover key features of SkyCiv Section Builder

A full-featured online beam section analysis and design software
SkyCiv Section Builder

Standard templates and database of sections

The Section Builder has a number of templates and libraries to get you started. Load from an international database of over 12,000 sections from the USA, Australia, UK, Canada, India, and Europe.

Current section list:

  • Rectangular/Square
  • Hollow Rectangular/Square
  • Hollow Circular/Circular
  • I-beam
  • T-beam
  • L-beam (Angle)
  • Double Angle
  • Channel
  • Double Channel
  • Triangular
  • Hollow Triangular
  • Box Girder
  • Multiple Cold Rolled Shapes
  • Change dimensions via the form or dimension lines

Custom shapes, including CAD importing

Need to model a shape not available in our templates? Specify your own custom shapes:

  • Points Shape: Define points and create your own polygons. Specify fillets at any point.
  • Line Shape: Define a line path and create a polygon with a thickness and radius.
  • DXF Import: Prefer to sketch in CAD first? Simply save it to a DXF file and import it into SkyCiv's Section Builder for analysis.
  • Use powerful features like Union, Intersection and Snap to Grid to make your section modelling easier.
SkyCiv Section Builder
SkyCiv Section Builder

Concrete section designer

The SkyCiv General Section Designer plugin allows you to add reinforcement and loads to test your section's moment and axial capacities. Design your concrete sections easily, using SkyCiv General Section Designer:

  • Add template or custom shapes via Section Builder
  • Easy reinforcement input and editing capabilities
  • Load in common materials, or add your own custom materials
  • Apply multiple loads, testing more than one case in one go
  • Review moment and axial capacities, stress/strains, stress contours, and utility ratios
  • Review real-time M-N interaction curves

Cross sectional analysis using FEA

Perform analysis on custom and template cross-sections to calculate bending, axial, torsional, and shear stresses. This in-built feature allows users to apply forces to their sections to get quick stress results. Use as a secondary check, or for a more detailed analysis of complex shapes with powerful cloud FEA.

Simple load input (axial, bending, shear and torsion forces) and review clear stress results via colored contours and PDF reporting. Cross sectional analysis combined with powerful modelling lets users design complex and custom shapes.

SkyCiv Composite Beam
SkyCiv Section Builder

Built-up sections

Model your built-up section by adding multiple shapes:

  • Add shapes from one of our many templates.
  • Operations including rotation, translation, and mirroring can be used to specify relative positioning.
  • Calculate geometric, bending, shear, and torsion properties.
  • Utilizes meshing and FEA to solve torsion constant and warping constant. More accurate than approximate methods which only work for some geometries.

Composite sections

Need to model sections made up of different materials? We have you covered:

  • Assign individual materials to individual shapes.
  • Preset materials mean you can select your material from a drop-down list for fast entry!
  • Calculate section properties via the Transformed Section Method.
  • Original section properties are also presented in comparison.
  • Easily model laminar beams and other built-up sections made up of different materials.
SkyCiv Composite Beam
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Watch this Section Builder demo to get a quick start:

Watch the Demo

More benefits from SkyCiv

A better design workflow
SkyCiv Cloud Computing Gif

SkyCiv structural design software is 100% cloud, giving you instant access through your web browsers. Simply log into your SkyCiv account and visit the software directly. You can now access your files from anywhere and at any time.

SkyCiv software is built with a number of great modeling, editing, and reviewing features that help you achieve a much faster modeling workflow. These range from the pen tool, bulk editing, camera roll, and more.

Learn about SkyCiv modeling features →

Clear step by step calculation reports help the engineer understand exactly what the software is doing - no more blackboxes!

Learn about reporting →

Share and collaborate in real-time with your team using our file sharing and permission control functionalities. They also allow the SkyCiv Support team to view your models so support can never be easier.

Learn about file sharing →

One account gives you access to all SkyCiv software, allowing you to make the most of our structural engineering software.

Learn about SkyCiv software list →

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Integrations and add-ons

Included in Structural 3D

SkyCiv Revit File Import Export


SkyCiv Excel Plugin


Google Drive

SkyCiv Grasshopper Plugin


SkyCiv Slack Plugin


SkyCiv Microsoft Teams Integration Structural engineers

Microsoft Team

Trusted by engineers around the world

Case studies of real structural engineering projects around the world
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SkyCiv KipCon testimonial
"The ease of use and the presentation of the results are both awesome. I have had ongoing interaction with the support team and everyone is excellent!"
Mitch Frumkin, CEO of Kipcon
SkyCiv TexasAM University Software Testomonial
It is used for various civil and mechanical engineering courses and the students love it. We are happy with the continuous updates to SkyCiv as well, highly recommended.
Dr Kenneth R. Leitch, Assoc. Prof. Texas A&M
SkyCiv StructSure testimonial
"It was easily the most intuitive package available to learn; it is particularly easy to build the 3D model and define nodes, members, supports, materials, sections, then apply loads & combinations."
Stuart Agars, Managing Director of Struct-Sure Limited

Flexible pricing, no lock-in contracts required

Flexible plans tailored to your needs

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