AFFANLTB: LATERAL TORSIONAL BUCKLING CALCULATOR

Beam stability checks shouldn't cost an afternoon. AffanLTB works out the elastic critical moment of your steel beam, runs the EN 1993-1-1 clause 6.3.2 buckling check, and gives you a calculation report you can put straight into your file. It runs in your browser, works offline, and needs nothing installed.
Built for engineers who need to show their working
•    Elastic critical moment, Mcr: real loads, load heights above or below the shear centre, and real end and intermediate restraints. It         doesn't rely on a simplified C1 factor.
•    Eurocode 3 check, clause 6.3.2: rolled-section and general-case methods, with automatic buckling curves and section classification. You enter your own National Annex parameters.
•    Single-span and continuous beams: span-by-span checks for multi-span beams, laid out the way commercial frame-analysis programs treat them.
•    Channel sections: including loads applied on the web.
•    448 standard sections: UB, UC, IPE, HE, W and PFC, plus your own custom sections.
•    PDF calculation report: the working shown step by step, a pass or fail result, and a sign-off block, with your name on every page.
•    C1 and C2 values for use with commercial analysis programs.
Checked, not assumed. The engine is verified against closed-form solutions, published tables, independent finite-element models and hand calculations, with several hundred automated checks run before every release.
Try it free
Open the free demo and see the result for a single-span I-section beam. It runs for 30 days. [Try the free demo link below]
The demo covers Mcr for single-span I-section beams. Multi-span beams, channel sections, the Eurocode 3 check and the C1/C2 values need a licence. For full functionality, ask us for a free 15-day trial licence.

Licences:
                                                Annual                                                            Perpetual
Price                                     £19.99 per year                                               £59.99 one-off
Everything unlocked        Yes                                                                    Yes
Valid for                              1 year; renew with a new key                      No expiry for this version
Name on every report     Yes                                                                    Yes

Prices in GBP are exclusive of VAT. For UK customers, VAT is added at 20% (£23.99 a year or £71.99 one-off including VAT).
How to buy
1.    Email [aftab.khan@affanengineering.co.uk] with your name (as you want it on your reports) and the licence you want.
2.    We reply with our bank details and a payment reference.
3.    Pay by bank transfer.
4.    When the payment arrives, we email your licence key, normally within one working day.
5.    Open AffanLTB, click the licence button at the top right, paste your key and press Apply.
Request a free 15-day trial-Full working at · [aftab.khan@affanengineering.co.uk]
AffanLTB is a calculation aid. The user remains responsible for checking inputs and results and for the design.