Silicon Valley Clean Water
JF Shea Parsons Joint Venture
Location: Redwood City, CA
Industries Served: Civil-Heavy Construction
Equipment: System Scaffold Stair Towers, System Scaffolding
Services Provided: Competent Person Training (CPT), Drafting & Design, Engineering
Scaffold Engineering: Universal Manufacturing
Silicon Valley Clean Water, RESCU Program:
Front of Plant Project Website
Silicon Valley Clean Water, RESCU Program Learning Center:
Work In Progress Videos
Tanner Pacific, Project Profile:
Work In Progress Videos
Parsons Corporation, Project Profile:
WParsons Design-Build JV Wins Silicon Valley Clean Water Project
After the initial excavation and installation of the support structure, crews will fit rebar to match the curvature of the shaft and formwork to pour an interior barrier referred to as the second-pass wall. This will serve as the visible wall surface and extend 6-feet above ground elevation.
Universal designed and engineered a system scaffold stair tower to provide SPJV with a safe and efficient means of access throughout the duration of the project. Along the way, our team overcame a number of unique challenges including limited space, support, and more than 100-foot height requirement.
To allow space for additional wall pours in the main vertical shaft, along with additional pours at ground elevation, our team engineered custom wall-tie configurations capable of securing the tower approximately 8-feet from the exterior wall and provided bridged access more than 10-feet above the lip.
As part of our complete equipment design and engineering package, Universal also provided on-site Competent Scaffold Person Training (CPT) and supervisory assistance so that SPJV was able to self-preform all scaffold operations efficiently, building and installing the tower in just 3 work shifts.
Limited in area to stage and assemble the scaffold components for the more than 100-foot requirement at the floor of the shaft, Universal designed the stair tower to be built at ground elevation in a total of five 3-lift sections, then stacked on top of one another using the site’s overhead crane.
The individual sections of tower were lifted into position using a series of custom engineered lifting rigs. Over the years Universal has designed dozens of these custom rigs and employed this concept for applications to achieve a wide variety of objectives.