Precast Concrete Manholes , Catch Basins and Related Items

2026-11-03

The precast concrete products and related items shall meet the following minimum requirements : A . General 1 . All precast concrete products shall be constructed of concrete with a minimum 28 day compressive strength of 4 , 000 psi , and reinforcing steel that conforms to ASTM A185 . 2 . All items , except manhole bases with cast - in - place rubber compression seals , must be available within forty - eight ( 48 ) hours of issuance of Purchase Order by the Owner . Manhole bases with rubber compression seals must be available within seven ( 7 ) calendar days of issuance of Purchase Order by the Owner . 3 . All precast concrete products shall have lifting hooks or eyes installed at the time of manufacture . Lifting eyes shall be Dayton Superior ( Swift lift ) or County - approved equal . Two ton eyes shall be used with catch basins , hand holes , and 4 ' diameter manholes . Four ton eyes shall be used with splice boxes , and 5 ' diameter manholes . 4 . Delivery prices for all supplies shall include delivery within Monroe County and unloading at delivery site . B . Circular Manhole Bases , Risers and Flat Tops 1 . Precast circular structures shall be designed and constructed in conformance with ASTM C - 478 . 2 . Precast concrete structures shall be steel reinforced to meet or exceed HS - 20 loading . 3 . Joints shall be flexible watertight conforming to ASTM C - 443 , bell and spigot type , utilizing a neoprene gasket . 4 . Manhole sections shall be supplied with polypropylene , grade 60 steel reinforced steps installed 12 inches on center , vertically . Steps shall be M . A . Industries PS2 - PF - DF , or County approved equal . 5 . Manhole bases floors shall be monolithic with its walls . 6 . Manhole top slabs shall be flat with a minimum of 8 ” thickness and have a 24 ” diameter opening . 7 . Refer to “ Monroe County Pure Waters ” Figure 2 . 01 for additional requirements C . Catch Basin Bases and Risers ...

New York

2026-05-05