# iSection > Engineering app for calculating structural properties of built-up section members. (iPhone/iPad app by ahmj.) - Source: https://appshunter.io/ios/app/isection/id304905558 (this page in markdown: same URL + `.md`) - Developer: [ahmj](https://appshunter.io/developer/304905561) - Category: Productivity - Price: $2.99 - Rating: 2.50/5 from 4 App Store ratings · 4 written reviews indexed - Age rating: 4+ - Requires: iOS 11.0 · 2 MB - Languages: American English - Released: 2009-02-17 - Data updated: 2026-06-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/isection/id304905558/reviews.md ## What is iSection? For all structural engineers, steel designers, mechanical engineers: This engineering application for the iPhone or the iPod Touch calculates the mechanical and structural properties of three-plate built up section members. That includes moment of inertia, modulus of section, radius of gyration, area and weight. The calculations are done in both principal axes. This program is particularly useful for analysis and design of indeterminate structures and for calculating actual and allowable (permissible) stresses The input is top flange width, top flange thickness, bottom flange width, bottom flange thickness, web depth and web thickness. The top flange and bottom flange dimensions can vary. you can select a section from a large library of hot rolled shapes: European IPE, HEA, HEB, HEM, American W shapes, Canadian W metric shapes and British universal beams and columns (UB and UC shapes). More shapes from other countries will be added in the next releases. All these will be free upgrades for those who purchase the current version. The input can be in mm or inch units, the output of area, Ixx, Sxx, Sxt, Sxb, Iyy, Iyt, Iyb, Syy rx, ry, rt, rb, Syt, Syb, depth and neutral axis can be displayed in mm or inch units. The weight can be displayed in kg/m or Lb/ft. See also iConcrete and EnCalculator in the App Store. ## Key features - Calculates moment of inertia, modulus of section, radius of gyration, area, and weight - Performs calculations in principal axes - Supports input for varying top and bottom flange dimensions - Includes a library of hot-rolled shapes (IPE, HEA, HEB, HEM, W, UB, UC) - Supports unit conversions (mm/inch, kg/m/Lb/ft) - Free upgrades for future shape additions ## Recent user reviews (4 of 4) All indexed reviews: https://appshunter.io/ios/app/isection/id304905558/reviews.md ### 3/5 — Engineer *2010-08-15* The program is eventually operable - you need to clear all the dimensions until all that's left are the three X's and hit "done". It should then come up with BUILT UP in the shapes box. Now you can type in your plate dimensions and get the properties calculated. The developer should fix this or at least include the start- up directions. Very frustrating at first! ### 1/5 — MS, PE *2010-04-17* Just a short I beam table. Not much use for design. Guess u take ur chances with apps. ### 1/5 — Structural Engineet *2009-11-02* I thought this app should be great! But it is actually a trash! The first thing you see in the app was a section showing a built- up section. Intuitively I knew that the blue texts were inputs. I change the units to inch. Then i began changing the dimensions. When i finished, all it said was that " there are no matches found"! What? It wasn't supposed to find any matches at all, I thought it was supposed to calculate properties based om my input. And where are the built in library for hot rolled shapes? And all those things that the developer promised that this app would do, like giving me the allowable stresses... Was this program created by a real structural engineer who really knows what a structural engineer need? I dont give it any star at all. In fact, if this app is not fixed, this should not be included in the App Store. ### 1/5 — Does not work correctly *2009-07-27* When entering a stock section name, there is no way to select from the list which is shown, and the last section seems to be selected from the list. For instance, if you type "w12x19", a list including W12x19 & W12x190 appears, but it is not a pick list. If you click Done, you get properties for W12x190 rather than W12x19. Also, as with iConcrete, the properties seem to randomly switch from inch to mm. Why do we need "mm" properties for the US/AISC standard sections when the design community and trades are NOT going metric within the next decade? ## Frequently asked questions about iSection ### What structural properties does iSection calculate? iSection calculates key properties such as moment of inertia, modulus of section, radius of gyration, area, and weight for built-up section members. These calculations are performed in both principal axes for comprehensive analysis. ### What types of steel shapes are included in iSection? The app features a library of hot-rolled shapes including European IPE, HEA, HEB, HEM, American W shapes, Canadian W metric shapes, and British universal beams and columns (UB and UC). More shapes from other countries will be added in future free upgrades. ### Can iSection handle different unit systems? Yes, iSection supports input and output in both millimeters (mm) and inches (inch). Weight can also be displayed in kilograms per meter (kg/m) or pounds per foot (Lb/ft). ### Is iSection available on Android devices? Based on the provided information, iSection is currently supported on iPhone and iPod Touch devices only. It is not listed as available for Android. ### How often is iSection updated? The latest version of iSection is 1.41, which was last updated on October 10, 2021. This indicates a release cadence of approximately once every few years for major updates. ### What is the price of iSection? iSection is a paid application, available for a one-time purchase of $2.99. There are no in-app purchases or subscription fees associated with this app. ### What is the age rating for iSection? iSection has an age rating of 4+, making it suitable for a wide range of users. This rating suggests it contains no mature content. ### Does iSection have ads? No, iSection does not contain advertisements. As a paid application, users can expect an ad-free experience. ## Version history (last 5 releases) ### 1.41 — 2021-10-10 Rebuilt to run on latest iOS 15 and iPadOS 15 ### 1.40 — 2016-02-10 Torsional Properties Plastic Moduli American heavy sections American S, M and HP sections Canadian S, M and HP sections Chinese HW, HM, HN and I sections Japanese H sections Indian ISJB, ISLB, ISMB and ISHB sections ### 1.31 — 2014-12-15 - The issue that prevents selection of certain hot rolled sections has now been resolved. - Now application can accept input and display sizes of members in fractional inch format in addition to decimal inch and millimetre formats. ### 1.21 — 2012-10-16 - iOS 6.0 compatibility - Help button ### 1.20 — 2010-02-27 Help appears at start. Added Canadian W metric shapes. Added British UB shapes. 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User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*