Transcription of MANHOLE SIZING RECOMMENDATIONS - Precast concrete
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MANHOLE SIZING RECOMMENDATIONS - Precast concrete
MANHOLE SIZING RECOMMENDATIONSN ational Precast concrete Association 1320 City Center Dr., Suite 200 Carmel, IN 46032 manholes are the most widely used maintenance utility structures that provide access to pipelines for inspection and cleanout. manholes are used for connecting two or more converging storm or sanitary sewers, permitting pipe size changes, accommodating abrupt changes in alignment or grade and allowing for direct surface flow interception. The largest impact on the size of these structures is the diameter and angle of entrance of the intersecting pipe .
Pipe Diameter (inches) Manhole Diameter 48 in 60 in 72 in 84 in 96 in 108 in 120 in 72 - - - - 154 120 102 66 - - - - 129 106 92 60 - - - 142 112 95 83
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