I am going to build a balcony that extends 2.2m from the facade and then 7m "wide". It will later be extended by an additional 3 meters as an attefall extension. The balcony should also function as a carport, and therefore, I don't want any pillars obstructing when driving in the car. I received a quote where a glulam beam was dimensioned to be 115x585 to handle a 7m clear span.
Is there anyone who could answer what the equivalent IPE or HEA beam dimensions would be?
Would I manage with a 200mm IPE or HEA?
Is there anyone who could answer what the equivalent IPE or HEA beam dimensions would be?
Would I manage with a 200mm IPE or HEA?
It should correspond to IPE330 or HEA260 in terms of strength, with S275 steel. But have someone more experienced calculate it, I'm a novice at this. I haven't checked deflection either.
I would say IPE 300 or HEA 240. IPE will be taller but also prettier when the beams are visible. However, I perceive these dimensions, such as 115x585 mm glulam, as clearly exaggerated. Who calculated that for you? The use as a balcony increases the load, but I think 115x450 in glulam is a more reasonable size. 165x405 has the same capacity.
Sitting and studying for an exam in construction engineering, so I thought I might as well try to calculate this. 
For glulam, just as Justus suggested, I got 115x450 with fmk=32 MPa (strength parallel to the fibers in bending). However, I have not checked the deflection.
Alternative steel: HEA160 or IPE200. The deflection for the IPE beam under characteristic load combination I calculated to be 38mm (L/185).
For glulam, just as Justus suggested, I got 115x450 with fmk=32 MPa (strength parallel to the fibers in bending). However, I have not checked the deflection.
Alternative steel: HEA160 or IPE200. The deflection for the IPE beam under characteristic load combination I calculated to be 38mm (L/185).
You are on the same track as I am. I also got 38 mm for IPE 200. Those who watched the episode of Husdrömmar on TV where they built a huge house with eaves and balconies in Hällingsjö with a steel frame, could notice that the cantilevered steel beams for the balconies were of the IPE type. HEA beams in that situation would have looked mechanical.
Snow zone 2.0 in Alingsås. I was counting on snow zone 1.5.
It is common not to account for both live load and snow load on balconies. The larger of the two is used, which is almost always the live load.
It not only reduces the strength, but it can also become quite unsightly over time. I would consider a different construction of the load-bearing structure, which shortens the spans. It often pays off to have multiple alternative models. Then it's easy to optimize strength and cost (by calculating the volume of glulam). Expect steel to be twice as expensive as glulam.
