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ANNEX
Installation proposal for the shaft cover, class D
Installation proposal according to standard road structure.
Commercial BEGU cover - Cover Class
1
D
Commercial concrete rings for height
2
levelling
Top piece made of plastic, height ad-
3
justable from 40 to max. 300 mm
a Wear layer approx. 3 cm
b Bituminous base layer approx. 8-12 cm
c Clean layer approx. 10 cm
d Crushed rock approx. 20 cm
e Antifreeze gravel approx. 25-30 cm
f
Soil
g Grit
18
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