DT-SS-U-1028_Pre-cast_Concrete_Pad_for_LBC_Cabinet.pdf

This engineering standards document details pre-cast concrete pad specifications for LBC (Line Break Cabinet) installations for the City of Palo Alto, California Utilities Electric Engineering Department. The document provides three distinct pad design variations (labeled A, B, and C) with precise dimensional requirements for concrete pad construction, including rebar placement, sand base preparation, and specific placement instructions for utility boxes and vaults. Each pad design includes a top-down plan view and a side section view with detailed measurements, and includes specific notes about pad construction, vault installation, and positioning of pad windows and manholes.

The technical specifications are consistent across the three pad designs, with key requirements including: placement of 6" compacted sand under the utility box, 1" concrete base, pad construction per standard DT-SS-C-1005, centering of pad windows over boxes, and vault installation per CPAU (City of Palo Alto Utilities) standard drawing DT-SS-J-1002. The drawings specify different pad dimensions and configurations to accommodate various utility cabinet and vault sizes, with specific references to Alhambra A1252 cover and frame specifications for one design. The document was originally approved in 7/1994 and has undergone at least two revisions, with the most recent revision adding box details on 1/12.