CONCRETE PIPE 1-S Manhole Limitations Pipe Size (mm) Maximum Angle at Face for Type 1-S Manhole Size tyPE 1-s manholEs / lIFt statIons 300 375 450 525 600 675 750 900 1050 1200 1350 1500 1650 1800 1950 2100 Pipe Size (mm) 1.2 1-S 45 45 40 35 30 25 0 - 1.5 1-S 45 1.9 1-S 45 2.4 1-S 45 2.8 1-S 45 45 45 maximum45 angle off of Face for type 1s manhole size: 45 45 1500mm 45 45 45 45 45 45 40 45 30 45 15 45 40 30 15 45 1930mm 4545 4545 4545 4545 4545 4045 3045 2045 1040 30 20 10 45 2400mm 45 45 45 45 45 45 45 45 45 45 45 45 45 45 40 45 45 30 45 25 40 10 30 25 10 45 2800mm 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 40 45 35 45 30 40 20 35 15 30 20 15 45 45 45 40 35 30 25 0 - 451200mm Pipe entries can be accommodated in all sides of a Type 1-S manhole, though it is recommended that this situation be avoided so as to allow for manhole steps to be installed along one wall. Alternatively, special ladder sections are available from a third party supplier. In general, the maximum pipe size allowable for concrete is the maximum size that physically fits in the structure. For plastic pipes, any opening over 600 mm in diameter may require additional reinforcing. Every Type 1-S manhole is considered on a case by case basis regarding the maximum amount and size of openings that can be accommodated. Please contact your local Lafarge representative if there are any questions or concerns with a particular manhole. 300 375 450 525 600 675 750 900 1050 1200 1350 1500 1650 1800 1950 2100 Notes: • If pipe Notes: angle is greater than show, use larger manhole size. 1 . If pipe angle is greater than shown, use larger manhole . PAGE 28 LAFARGE PIPE eMANUAL