Edge Beam Load Capacity

[Kirre2021]

Hello,

I have an Erge floor structure where the beams are about 100x185mm with 1300mm spacing. On top are concrete slabs (modules) + poured concrete, I guess. All beams sag about 1.5-2cm in the middle, spanning 4.78m. Built in 1968.

• Can concrete floors sag, or are they like that from the start? More weight has been added to the house over the last 50 years, such as a bathroom with tiles, leveling compound, etc., versus a wet room mat. Also, new heavier kitchens and appliances, etc.

* What load-bearing capacity do these have? I don't know the specs other than K250, but I'm unsure if that refers to the beams.

* Should one place props underneath as a safety measure to prevent them from sinking more or breaking due to loading? The floors in the residence have similar sagging in the middle as the beams. However, it's a bit strange since there's concrete under the parquet.

In summary: Is it a good idea to place props in the middle of the beams, or is it a completely wasted effort considering the house is over 50 years old and they are concrete beams?

 

[Matti_75]

Does the floor on the upper side have the same deflection?

 

[Plupp 618974]

Does the floor on the top have the same sagging?

It says that this is the case:

"The floors in the residence have a corresponding sag in the middle as the beams. However, it's a bit strange since there's concrete under the parquet."

 

[Matti_75]

Then you can pump it up if you want and cast a new plint underneath to get a level floor.