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PIPE CULVERTS

TABLE IA: Class of Reinforced Concrete Pipe for the Respective Diameters of Pipe and Fill Heights over the Top of Pipe (English)

. Type 1 Type 2 Type 3 Type 4 Type 5 Type 6 Type 7
Nominal Diameter Inches Fill Height:
Greater than 1'- 0" Not exceeding
3'		 Fill Height:
Greater than 3' Not exceeding 10'		 Fill Heights:
Greater than 10' Not exceeding 15'		 Fill Height:
Greater than 15' Not exceeding 20'		 Fill Height:
Greater than 20' Not exceeding 25'		 Fill Height:
Greater than 25' Not exceeding 30'		 Fill Height:
Greater than 30' Not exceeding 35'
12
 IV
 II III IV V V V
15
18
 IV
IV		 II
II
 III
III
 IV
IV		 V
IV
 V
V
 V
V
21
24
30		 IV
IV
IV		 II
II
II		 III
III
III		 IV
IV
IV		 IV
IV
IV		 V
V
V		 V
V
V
36
42
48		 III
III
II		 II
II
II		 III
III
III		 IV
IV
IV		 IV
IV
IV		 V
V
V		 V
V
V
54
60
66		 II
I
I		 II
II
II		 III
III
III		 IV
IV
IV		 IV
V
V		 V
V
V		 V
V
V
72
78
84		 I
I
I		 I
I
I		 III
III
III		 IV
IV
IV		 V
*V
*V		 V
*V
*V		 V
*V
*V
90
96
102
108		 I
I
I
I		 I
I
I
I		 III
III
III
III		 *IV
*IV
*IV
*IV		 *V
*V
*V
*V		 *V
*V
*V
*V		 *V
*V
*V
*V

* Special Design Required

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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