Architect-1 plans the reinforced concrete intermediate floor slab at 30 cm (12 inches) and has a lot of freedom in wall placement.
Architect-2 calls this "letting the forces roam" and suggests that for cost reasons, the load-bearing walls should be better planned to then manage with 22 cm (9 inches) of reinforced concrete.
The construction supervisor calculates 260 sqm * 8 cm (3 inches) = 20 m³ (additional) reinforced concrete * 150 € (85 per m³ concrete plus steel) = 3000 €, and sees no reason to adjust the floor plan.
Of course, the structural engineer has the final say, and small wall shifts don’t hurt anyone. But I also tend to avoid compromising on the floor plan just to save 3000 €. Looking forward to your comments on this.
Architect-2 calls this "letting the forces roam" and suggests that for cost reasons, the load-bearing walls should be better planned to then manage with 22 cm (9 inches) of reinforced concrete.
The construction supervisor calculates 260 sqm * 8 cm (3 inches) = 20 m³ (additional) reinforced concrete * 150 € (85 per m³ concrete plus steel) = 3000 €, and sees no reason to adjust the floor plan.
Of course, the structural engineer has the final say, and small wall shifts don’t hurt anyone. But I also tend to avoid compromising on the floor plan just to save 3000 €. Looking forward to your comments on this.
O
Osnabruecker13 May 2022 05:37Is the building height regulated in your area? For us, the additional thickness of the concrete would have negatively affected the building width (setback distance to the boundary: height/2).
In der Ruine13 May 2022 06:33karl.jonas schrieb:
20 m3 (additional) reinforced concrete * 150 € (85 per m3 concrete plus steel)Cute, I pay 151.50 € per m³ (including surcharges, but without steel) for concrete alone.Well, the 3,000 euros can quickly increase.
You correctly pointed out that everything depends on the structural engineer.
In our estimate, 2.5 tons (2.76 US tons) of reinforcement were indicated.
After the structural engineer’s assessment, it was 6.5 tons (7.17 US tons).
Steel is very expensive. I would possibly first talk to the structural engineer and then discuss whether the walls should be moved as an alternative.
You correctly pointed out that everything depends on the structural engineer.
In our estimate, 2.5 tons (2.76 US tons) of reinforcement were indicated.
After the structural engineer’s assessment, it was 6.5 tons (7.17 US tons).
Steel is very expensive. I would possibly first talk to the structural engineer and then discuss whether the walls should be moved as an alternative.
K
karl.jonas14 May 2022 15:51Thanks for the feedback. The current plans were sent to the structural engineer yesterday, and we are expected to speak with him tomorrow. Let’s see what he says.
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