SFA Sanifos 1600 Manual De Instalacion Y Uso página 18

EN
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