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STORM SEWERS

Strength Required for the Respective Diameters of Pipe and Fill Heights over the Top of the Pipe for Storm Sewers (Metric)

. Type 1 Type 2 Type 3 Type 4 Type 5 Type 6 Type 7
Nominal Diameter mm Fill Height:
Greater than 0.3 m  Not exceeding
1 m		 Fill Height:
Greater than 1 m Not exceeding
3 m		 Fill Heights:
Greater than 3 m Not exceeding 4.5 m		 Fill Height:
Greater than 4.5 m Not exceeding
6 m		 Fill Height:
Greater than 6 m Not exceeding 7.5 m		 Fill Height:
Greater than 7.5 m Not exceeding
9 m		 Fill Height:
Greater than 9 m  Not exceeding
10.5 m
250
300
375		 NA
IV
IV		 NA
III
III		 NA
IV
IV		 NA
V
V		 NA
V-150D
V-145D		 NA
V-180D
V-160D		 NA
V-190D
V-170D
450
525
600		 IV
IV
IV		 III
III
III		 IV
IV
IV		 V
V
V		 V
V
V		 V-150D
V
V		 V-160D
V-150D
V
675
750
825		 IV
III
III		 III
III
III		 IV
IV
IV		 V
V
IV		 V
V
V		 V
V
V		 V
V
V
900
1050
1200		 III
II
II		 III
III
III		 IV
IV
IV		 IV
IV
IV		 V
V
V		 V
V
V		 V
V
V
1350
1500
1650		 II
I
I		 III
II
II		 IV
IV
III		 IV
IV
IV		 V
V
IV		 V
V
V		 V
V
V
1800
1950
2100		 I
I
I		 II
II
II		 III
III
III		 IV
IV
IV		 IV
IV
IV		 V
V
V		 V
V
V
2250
2400
2550
2700		 I
I
I
I		 II
II
II
II		 III
III
III
III		 IV
IV
IV
IV		 IV
IV
IV
IV		 V
V
V
V		 V
V
V
V


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Illinois Concrete Pipe Association
241 North 5th Street
Springfield, IL 62701 USA
Tel: 217.523.7473
Fax: 217.544.0086
Email: info@il-concretepipe.org
Website: http://www.il-concretepipe.org