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North Transfer Station Rebuild​

Awarded the prestigious IDEAS2 National Award by AISC, the North Transfer Station is Hailed as one of America's most striking and community-oriented waste management facilities. This innovative project, located in Seattle's Wallingford neighborhood, includes a new 67,000 sq. ft. tipping and transfer building, a 10,000 sq. ft. reuse/recycle building, and a 2,400 sq. ft. administration building. 

 

Project Highlights

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Integrated Design Engineers faced the challenge of creating a structure with a 200-foot clear span while adhering to Seattle Public Utilities' height restrictions. Their solution was a tri-chorded roof truss system, which not only met the height requirements but also achieved exceptional LEED daylighting credits.​​​​​

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A standout feature of the design is the "floating corner" a 50-foot cantilever truss and a 120-foot main transfer truss system that supports the building's southwest corner without any columns or walls. This innovative design allows for unobstructed truck access to the building's lower level. 

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Project Praise

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“A truly innovative, creative solution to program requirements that shows advances in the use of structural steel.”
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— Jeff Yoders, Engineering News-Record magazine

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“Overall, the steel elements create an organizational framework and visual interest that defines the open space and thus becomes a significant part of the architectural aesthetic.”

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— Lead Architect, Mahlum.

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Project Overview

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  • Owner: Seattle Public Utilities

  • Prime Consultant: CDM Smith Inc.

  • Contractor: Lydig Construction

  • Architect: Mahlum

  • Location: Seattle, Washington

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Recognition

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3_Southeast View to Tipping Transfer Building.png
1_Southwest View of Floating Corner Transfer Trusses and Truck Access Ramp.png
2_Tipping Transfer Building Interior View Showing Tri-Chorded Trusses and Transfer Trusses
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