226014_Attachment_3.pdf

This technical drawing from Tacoma Water is a detailed engineering specification for a Water Valve Box and Cover (Detail No. SD-300), dated 6/97 with a revision on 8/00. The standard detail schematic provides precise dimensional specifications for a cast iron valve box and cover used in water infrastructure systems. The document specifies that all materials must be cast iron per ASTM A-48, Class 30 B, with the cover and box designed to weigh 50 pounds (± 5 pounds).

The technical drawing includes three sectional views (Cover, Valve Box, and A-A and B-B sections) with exact measurements for each component. Key specifications include: 7 1/4" diameter pick holes, 3/4" raised letters 1/8" high, surfaces must be smooth and free of casting ridges and burrs, and the valve box cover must be capable of rotating 360 degrees in the box casting without binding. Lettering is restricted to what is shown on the valve box cover, and all surfaces must be precisely manufactured to ensure a snug fit between components.