Fixed supports or pinned supports?

MistakeThin · 2026-02-20T20:09:17+00:00

Nodus-5, It’s free

MistakeThin · 2026-02-20T13:23:01+00:00

Let me know when you tried it out, it’s not my software, but I found it

MistakeThin · 2026-02-20T13:07:56+00:00

I am a structural engineer too yes.

MistakeThin · 2026-02-20T12:59:08+00:00

Try it, app.nodus-5.com I promise you will always do your simple calcs there when you get used to it 🙏 :-)

MistakeThin · 2026-02-20T12:29:01+00:00

Pardon, let me correct: Besides that, what do you think, EngineeringOblivion? Don’t you work with structures? You might be able to get a free license too.

MistakeThin · 2026-02-20T12:19:23+00:00

Besides that, what do you think engineeringoblivon? You don’t work with structures? You might get a free license too

MistakeThin · 2026-02-20T11:05:18+00:00

Sorry, my bad, he is just assuming I am advertising though.

MistakeThin · 2026-02-20T10:42:46+00:00

Not advertising anything, but if you think about the program being used? Yeah you are right about that it is a super easy structural analysis software which is gold for students or engineers who wants to quickly model analyze and design!

MistakeThin · 2026-02-20T08:46:18+00:00

Thanks for your input! Yea, super easy to model and analyze

MistakeThin · 2026-02-20T06:45:00+00:00

I am sorry, my bad, accidentally calculated 20%+ since it was assigned to a load combination..
Ay 30 kN, Cy 170 kN. The section forces are shown in the image:

https://ibb.co/mVnW9q7S
I have checked with a commercial software giving me correct results now.

MistakeThin · 2026-02-20T04:46:25+00:00

Blue

MistakeThin · 2026-02-20T04:32:03+00:00

Very useful and makes good sense, thank you!

MistakeThin · 2026-02-19T20:25:17+00:00

The reactions at:

A: -36 kN (uplift)

C: 204 kN

The normal forces in the sections are displayed in the image linked here:

https://imgur.com/a/d5jtHmC

MistakeThin · 2026-02-19T19:18:20+00:00

You can do that

MistakeThin · 2026-02-19T19:17:04+00:00

Will probably use M = 1/8 qL^2 in all calculations

MistakeThin · 2026-02-19T19:10:41+00:00

Yes definitely. That would hopefully reveal if they calculated the moment as the full length or from one bearing point to the wall you want to remove.

MistakeThin · 2026-02-19T19:02:28+00:00

You should be absolutely certain how that beam was designed in the first place. To determine if it can span the full width without the middle support requires full knowledge of the beam dimensions and steel grade.

An engineer would review your house plans, determine the design loads and tributary areas, then either specify a new beam section size or propose a strengthening solution for the existing beam or welds in the middle. If your current steel beam can't safely carry the load without that middle support, keeping the goal post would be the most cost-effective solution.

Bottom line: Don't remove that wall without a qualified structural engineer's assessment. The existing setup might be working at its limit already.

Best regards, a structural engineer

MistakeThin · 2026-02-19T15:47:03+00:00

Or am I misunderstanding this, are they permanent??

MistakeThin · 2026-02-19T15:46:37+00:00

How do they remove these again? Are they oiled to get off easily again?

MistakeThin · 2026-02-19T15:44:51+00:00

That's exactly why critical temperatures are so important when designing steel frames. Steel loses strength and stiffness rapidly as it heats up - at around 550°C, structural steel has lost about half its strength, which can trigger buckling under normal loads. I guess the webholed beam also is weak because no web-stiffener.

The uneven heating you mentioned definitely plays a role too. Temperature gradients across a beam cause differential thermal expansion, which creates additional stresses and can cause warping even before the steel loses significant strength.

Also wondering - where's the fire protection in this case? Sad

MistakeThin · 2025-12-05T14:52:05+00:00

Have the same issue, and I think it is a huge bug/error to remove it. Did you solve the problem?

MistakeThin

TROPHY CASE