Hello!

I suspect the answer to this question is to contact a structural engineer - but I'm taking a chance and posting here in case there's an online calculator or something similar that can be used.

I'm building a conservatory attached to my house. The conservatory will be on a concrete slab. The walls will mostly consist of large glass sections, and the structure will be supported by glulam pillars. The roof will be tile. Initially, I thought about copying the foundation of my fairly newly built aerated concrete house (EPS 100, 300 mm, edge beam 200x200 reinforced with 4 x 10 mm) before realizing that the distribution of loads is very different when you have a continuous wall that should provide a distributed line load compared to a pillar structure with large point loads.

Therefore, I wonder: Is there any calculator or similar tool that can be used to calculate the point loads that each pillar will represent?
 
The principle is to calculate the total roof load and distribute it on the columns. If you have four symmetrically placed columns, each will take up a quarter of the roof load. A 2.4-meter-high glulam column with a cross-sectional measurement of 90x90 mm can handle a load of 50 kN (about 5000 kg). A roof structure with four columns can therefore handle a total of 200 kN, which is quite a lot. The roof load in Skåne should initially be 2-3 kN/sqm depending on the snow zone. The difficulty lies in calculating the impact of potential snow pockets depending on the location of the winter garden. With four columns, you can still go a long way. Then additional columns may be needed to avoid too long spans of the glulam beams. If you design each column base for 50 kN, you probably don't need to think much more about it. I don't think a standard edge beam can handle 50 kN, so some form of reinforcement is needed. An alternative is to place the columns slightly inset in relation to the edge beam. Then you can reinforce the slab with brackets underneath at the relevant points. It could be more aesthetically pleasing, even if it takes up more space.
 
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Very grateful for such quick answers! I will start counting tonight!
 
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