Y-1034-1 Top of Hopper.pdf

This document is a structural design drawing for the top of hopper grating and supports at the U.S. Army Corps of Engineers District, Portland, Oregon Dredge Yaquina project. The drawing was prepared by Marphco (Marphco Shipbuilding & Drydock Corporation) and is dated with drawing number Y-1034-1.

The drawing provides detailed structural plans and cross-sectional elevations showing the design of hopper grating systems and their supporting framework. It includes multiple sectional views (labeled as Section 10-E, 10-F, 15-D, 16-E, 16-D, 14-E, 14-A, 15-A, 11-A, and others) with precise measurements and specifications for steel components, grating installation, and structural connections. The document references standard structural details and includes general notes regarding welding procedures, material specifications (such as A36 steel and A325 bolts), and installation requirements. Notes specify that all welds must meet AWS specifications and that materials must comply with applicable ASTM standards. The drawing also includes references to standard structural details and indicates connections to adjacent structural systems, with guidance on proper assembly and field installation procedures for the dredge vessel's hopper grating system.