Cretex Concrete Products North, Inc

Sanitary Manhole Base Section Details

Monolithic Bottom Without Invert
Monolithic Bottom w/o Invert Sleeve Detail
FLEXIBLE SLEEVE DETAIL		 Monolithic Bottom w/o Invert Plan View
TYPICAL PLAN VIEW         

Legend:
A. Stainless steel take-up clamp
B. Rubber sleeve
C. Expandable stainless steel ring to compress gasket to manhole surface.

 Monolithic Bottom w/o Invert Section View
TYPICAL CROSS SECTION         

Notes:
1. Manholes are manufactured in accordance with ASTM C-478 and MnDOT Plate 4007.
2. Plastic manhole steps placed at 12" spacing. Steps comply with MnDOT Plate 4180, ASTM C-478 and OSHA. Steps placed over outlet if required.


Sanitary Manhole Base Section Details

Monolithic Bottom With Invert
Monolithic Bottom w/Invert Sleeve Detail
FLEXIBLE SLEEVE DETAIL		 Monolithic Bottom w/Invert Plan View
TYPICAL PLAN VIEW         

Legend:
A. Stainless steel take-up clamp
B. Rubber sleeve
C. Expandable stainless steel ring to compress gasket to manhole surface.

 Monolithic Bottom w/Invert Section View
TYPICAL CROSS SECTION         

Notes:
1. Manholes are manufactured in accordance with ASTM C-478 and MnDOT Plate 4007.
2. Plastic manhole steps placed at 12" spacing. Steps comply with MnDOT Plate 4180, ASTM C-478 and OSHA. Steps placed over outlet if required.
3. Precast inverts are manufactured with 5/8"± drop from inlet to outlet.
4. Concrete shelf slopes 1" per foot towards center of manhole.
DIMENSIONING OF MONOLITHIC BOTTOM WITH PREFORMED INVERT
PIPE SIZE A B
8" 9" 6 1/4"
10" 11" 8 1/2"
12" 13" 8 1/2"


Sanitary Manhole Base Section Details

Monolithic Outside Drop Section
MJ x PE CL.53 D.I.P. 90º ELBOW
A B C
8" 2'-2" 4"
10" 2'-4" 6"
12" 2'-5" 7"
Sanitary Drop Manhole Plan View
TYPICAL PLAN VIEW

Notes:
1. Manholes are manufactured in accordance with ASTM C-478 and MnDOT Plate 4007.
2. Plastic manhole steps placed at 12" spacing. Steps comply with MnDOT Plate 4180, ASTM C-478 and OSHA. Steps placed over outlet if required.
3. Structures can be made with or without invert.
4. Precast horseshoes to be used to encase drop pipe.

 Sanitary Drop Manhole Section View
TYPICAL CROSS SECTION

Copyright © 1999 The Cretex Companies, Inc.. All rights reserved.
Information in this document is subject to change without notice.
Other products and companies referred to herein are trademarks or registered trademarks of their respective companies or mark holders.