Hello,
I am currently working on a foundation for a single-story house with a basement. Part of the floor over the basement will consist of a concrete slab, intended to be cast with composite decking 45/peva45/Cofraplus. The plan is for the concrete slab to be 150mm thick, multi-span, and reinforced with 8150 mesh. It should handle my spans of 3m, 4.5m, and 4m according to
https://hogsaterplat.se/20.0.0.0/7126/10bbbbb1405ea70da80d77564b0cbb07.pdf if I understand it correctly.
Unfortunately, I will have point loads from columns from the roof down onto this concrete slab where there is no supporting wall beneath.
The concrete slab will be approximately 8x10m. About 2.4m in from one long side corner, a point load of 75kn will land directly on the edge of the concrete slab. Below this, there is an approximately 1.4m free-spanning opening, where the point load lands about 30cm outside of any support.
I am considering whether I need to embed a steel beam or another type of beam under the slab to take up these forces. Both because it is on the edge of the slab and also because there is no support directly beneath it.
It is reinforced in the basement slab directly below, with approximately 30x30cm concrete, EPS300, and 4 pieces of 12mm rebar, 2 top and 2 bottom. Possibly, I might be able to place a column directly underneath to take all the force directly down into the basement, but that would take away some of the "door opening."
Do you think I need to reinforce with a beam under the concrete slab? In that case, would embedding an HEA beam work well, as I can get hold of some different sizes that have been outdoors for several years?
Thanks in advance!
