This 3' x 3' inlet catch basin casting has a 4" rise reversible frame with a flat grate. It will fit a 36" x 36" inner dimension drainage box with a flow area of 5.25 sq ft. This structure is casted in accordance to ASTM A48 Class 35B standards for grey cast iron, with a load rating of H-25/HS-20. 
 
This structure is comparable to a standard USF 4156-6241 casting.
 
Freight shipping is required. Current pricing, availability, and submittal information is available upon request.