Statics for wall breakthrough, is the floor plan sufficient?

  • Erstellt am 2022-01-25 10:59:54

Simon-189

2022-01-27 13:44:22
  • #1
Hello,

regarding the topic of statics, I can say as a steel construction engineer that many safety factors have to be considered. For example, there are screw connections that must not be loaded beyond 50% of their capacity. The same applies to anchor verifications. If an anchor is loaded more than 90%, I choose the next larger one for my construction. And why? In the shell construction phase, where it is primarily about statics, no one yet knows what the client will later do with the construction, tinker with it, or attach additional loads. The additional costs are marginal, and the increase in safety continues.

Because what is stated in the statics calculations assumes optimal conditions. Are these always present on site? Concrete without air and/or dirt inclusions, weld seams without slag inclusions, and optimal depth of fusion zones...

As a tip, if in the static calculation a profile HEA 240 width 240mm height 230mm results and you find that too large as a single profile, the statics engineer can also calculate two profiles placed side by side and bolted together. Then maybe 2x HEA 140 with a total width of 280mm but a height of 133mm results. And voilà, 100mm height gained.
 

barfly666

2022-01-27 13:55:39
  • #2
I would have the structural engineer come for the acceptance of the construction measures. It happened to me that the lintel with concrete (was a fixed price, the contractor wanted to save again) was much too short (rested on half bricks) and undersized. Work was stopped until the architect looked at it. Then my contractor had to redo it with a steel beam at his own expense.
 

Wilhelm2022

2022-02-03 15:15:28
  • #3
Hello everyone, thank you very much for your contributions. I have now received a calculation from the person who will also install the beam. He entered some data into a PC program (AEC Software) and said that he now wants to install an HEB 140 beam. Actually, a 120 would be sufficient, but he is taking the larger one anyway. Unfortunately, I cannot understand these calculations at all. Can any of you professionals tell me if this can be roughly correct, if the opening is supposed to be 2 meters and a concrete ceiling has to be supported? Can this roughly be correct? I am really unsure....thanks and regards
 

borxx

2022-02-06 11:36:50
  • #4
Do you have bigger issues regarding the clearance height, so that the 2-4cm would matter, or is it relaxed?

Googling with HEB would result in a price difference of almost €50 for 3m length (HEB120 €175, HEB140 €220). I would only invest more time and discussion if those few centimeters actually matter.
 

taschenonkel

2022-02-09 19:50:58
  • #5
Don't worry as long as no multi-story high-rise building is placed on the HEB 140. It holds. Such a steel beam is extremely durable. As long as you don't create a 5m wide opening now, the 140 actually always fits. And even then, it would be enough with an additional support...
 

Wilhelm2022

2022-02-13 01:16:15
  • #6
Sorry for my late reply. Thanks to you all anyway. No, 2-4 cm does not matter. The breakthrough will be made next week, I am curious whether everything will work out. Have a nice weekend, regards
 

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