Manhole Cover ASTRA Class D400 Round frame Ø 742 – Ventilated

Manhole Cover ASTRA Class D400 Round frame Ø 742 – Ventilated

RANGE / MARK ®
® ASTRA
CHOICE OF PRODUCT
Frame Round
Ventilated
Cover Round
MARKET / APPLICATION
Municipal Castings
PRODUCT FAMILY
MANHOLE COVERS
MANHOLE COVERS
CLASS EN124
D400 mini/Grp 4
Main features
AxB
725x685
mm
C
624
mm
O
605
mm
H
100
mm
E
96
mm
F
25
mm
Frame bearing pressure
7.09 (max EN124:7.5)
UNIT_N/mm²
Total mass
36.0
kg
Cover mass
24.0
kg
Packaging
7
Reference
CDAS60BD

Main characteristics:

Cover

  • Automatic locking by ductile iron spring bar
  • Unlocking by means of crow bar or pick axe, manual lifting
  • Ventilated or not
  • Hinged cover, opens to 110°, blocks at 90° when closing
  • Anti-theft spline option
  • Cover 90° turn lock option
  • Badging: exclusively generic markings such as e.g. “sewers”, “water”, “rain water”, etc...

Frame

  • Optimised frame

Frame bedding

  • Reduced frame width logically increases its bearing pressure on chamber top, when submitted to load.
  • It is key to ensure that the frame is completely seated on the chamber top, without any cantilever. If necessary, a spare concrete ring can be used between chamber top and frame to improve its seating.
  • Frame bedding must be achieved with Class CPA 500 concrete, or with quick setting mortars featuring a minimum resistance to compression of 50 MPa.

Field of application:

  • Group 4 (class D 400) in accordance with EN124-2 standard: areas bearing low traffic conditions, predominantly defined as private cars passing at restricted speed, typical conditions met in housing areas
  • Periodic inspection and visit of sewer mains

Material and coating:

  • Frame and cover in Ductile Iron EN GJS 400-15: bituminous coating
  • Ring in PE