About RSJ.info
Independent guides and free planning tools for Rolled Steel Joists — written for homeowners, builders and anyone preparing to speak with a structural engineer.
What We Publish
RSJ.info is an independent online publication. We explain beam sizes, load tables, installation workflows and quote-based UK / Poland project budgets in plain English. Our calculators help with early planning and budgeting. They are not a substitute for stamped structural calculations or Building Control approval.
Our section table identifies its manufacturer source, and the calculation method is published with its limitations. Illustrative scenarios and price examples are not documented projects or supplier quotations. The site has not received an independent structural engineering review. If you are removing a load-bearing wall or altering a structure, hire a chartered structural engineer and obtain the required approvals before work starts.
Editorial Standards
Data sources, formulas and corrections
- Practical planning content — not marketing fluff
- Clear disclaimers on every calculator and structural guide
- Named publisher and a clear distinction between educational examples and documented projects
- Corrections welcome — email us if you spot an error
About the Publisher
Krystian Welcel
Publisher & Developer
Krystian Welcel publishes RSJ.info and develops its web tools. His background is in software development. The site's construction guides and calculators are educational resources, not professional structural designs.
RSJ.info is an independent website maintained by Krystian Welcel, a freelance full-stack developer. He is responsible for publishing the guides and maintaining the website. He consults engineers and software developers when writing articles to help ensure their technical accuracy.
Illustrative project scenarios on this site are fictional educational examples. They are not accounts of completed building projects or evidence of site experience.
People We Consult
Jeffrey Ockram
Consultant · London, UK
Jeffrey specialises in residential alterations, extensions and load-bearing wall removals involving structural steel calculations. Krystian consults him when writing about these subjects.
Krystian remains responsible for the published articles. Consultation does not constitute approval of a reader's project or an independent review of every article and calculator.
Mark Wickenson
Content consultant · Arundel, UK
Mark specialises in AutoCAD, Tedds structural software, residential alterations and extensions. He helps Krystian prepare articles on these subjects and discuss the software workflows involved.
Krystian remains responsible for the published articles. Consultation does not constitute approval of a reader's project or an independent review of every article and calculator.
Contact
Questions about our content, corrections, or suggestions for a new guide? Email is the best way to reach us. We do not offer structural design advice by email.
Publication
RSJ.info
Independent online publication
Serving UK & Europe readers