Our house was built in the 1940s and has a masonry terrace/balcony of just over 10 sqm (approximately 2.08x5.5 m) with a rounded corner around the house in functionalist style. For a long time, we didn't know how to use the terrace (there are two decks that we use today), but in recent years we have been more and more considering placing a round outdoor spa in the "rounded corner."
Now to our problem: will the floor of the terrace support a round hot tub with 4 people, totaling just under 1.5 tons? As you can see in the pictures, it is a poured floor with a floor drain. I have studied the house's plans and concluded that the "walls" under the terrace and the facade consist of masonry cement blocks. The space under the terrace is not accessible today. There is no inspection hatch. And from the plans, I cannot determine how the terrace floor is constructed or attached to the facade. Could it be anything other than reinforced concrete? Are there any risks here? Can an expert help me interpret the plan?
Since the terrace extends about 25 cm over the masonry walls (thick line), the spa (dashed line) can largely stand directly above the wall. What do you think?
I don't know if the overhang can be equated with there being a "ledge" under the floor. One would probably want a peephole underneath perhaps (or create a storage space) and/or consult an engineer or someone who can calculate the load.
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