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.