B08_Attachment_1_Specifications_Stalding_Bridge_Plans.pdf

This is a structural design document containing engineering calculations and bridge design specifications for the Stalding Bridge located in Port Angeles, Washington. The document was prepared by Haines, Gipson & Associates, Inc., a consulting engineering firm, for Bridge Solutions, LLC (Project Job Number 2009-299, dated December 11, 2009). The calculations were performed by Jeff Vandiver, EIT, and reviewed by Randall Gipson, PE.

The design adheres to the AASHTO Guide Specifications for Pedestrian Bridges (1997 edition) and AASHTO LRFD Bridge Design Specifications (2007 edition). Structural analysis was conducted using STAAD software with ASCE load combinations to determine design forces, and steel member design was completed using AISC ASD 13th edition standards. Design loads specified include dead load (self-weight plus 5 psf), pedestrian load (100 psf reducible per Specifications 13420-5), handrail (50 plf per AASHTO Chapter 13), snow load (225 psf reducible), and wind load (80 mph basic wind speed at elevation below 30 feet with 35 psf pressure). The document includes detailed architectural and structural drawings with section details, elevation views, and component specifications. Several loads were not considered in the design, including centrifugal force, braking force, vehicular collision, water flow, ice loads, earthquake loads, earth pressure, thermal loads, frictional loads, and vessel collision, consistent with pedestrian bridge design standards.