Manhole Frames & Covers

Materials & Standard

USA & Canada

Grey Cast Iron –

  • ASTM \ A 48A CL 30B
  • ASTM \ A 48A CL 35B

Ductile Iron –

  • ASTM \ A 536——Grade 65-45-12
  • ASTM \ A 536——Grade 80-55-06

Middle East

Grey Cast Iron –

  • BS 497 : 1976

Ductile Iron –

  • EN 124

Europe

Ductile Iron –

  • EN 124 ( GGG50, GGG40)

Load Ratings

A 15
The access covers and grates of this class are capable of withstanding a 15kN (~1.5 tonnes) test load which can only be used in pedestrian areas and by pedal cyclists.
B 125
Car parks and pedestrian areas where occasional vehicular access is likely.
E 600
The access covers and grates of this class are capable of withstanding a 600kN (~60 tonnes) in test loading areas, docks, aircraft pavements.
C 250
The access covers and grates of this class are capable of withstanding a 250kN (~25 tonnes) test load.
D 400
Carriage ways, hardshoulders and pedestrian areas where cars and lorries have access.
F 900
The access covers and grates of this class are capable of withstanding a 900kN (~90 tonnes) in test load areas, docks, aircraft pavements.