r₁ = dₐ 

r₂ = 30 mm bis dₐ = 1250 mm

r₂ = 50 mm bis dₐ = 2000 mm

r₂ = 75 mm bis dₐ = 2900 mm

r₂ = 100 mm bis dₐ > 2900 mm

h₂ ≈ 0,1427 dₐ 

h₁ (depending on s) = 20 to 25 mm

Volume of the curved section (without shelf height h₁) V ≈ 0,0607 dₐ³

If s = minimum wall thickness, please specify on enquiry.