Multnomah County East County Library

Gresham, Oregon

Alliant was chosen to provide mechanical design-assist construction services for the new Multnomah County East County Library, situated at 1297 NW Eastman Parkway in Gresham. This nearly 95,000 square foot structure is located on the former site of the Gresham City Hall Park and Ride, marking a significant transformation for the area. Serving as the county's second-largest library, it will stand as a prominent addition alongside the downtown Central branch.

Among its notable features, the library boasts an auditorium, a dedicated space for teenagers, a café, a children's play area, communal outdoor spaces, technology hubs, and a spacious maker space. Utilizing CLT construction, a favored material in contemporary building practices, this project aims to blend innovative design with sustainable construction methods.

Alliant Systems led the plumbing, HVAC, and piping systems coordination and installation for the project. Special features include radiant flooring, AERMEC Air to Water Heat Pumps (AWHP), two-pipe slab recessed Jaga forced air convection units, AAON Air Handing Units (AHU), beautiful plumbing fixtures and features, hydronic piping and more.

Mass Timber Coordination
The library is comprised of 1,200 glulam beams and nearly 300 CLT panels. Alliant played a critical role in driving the BIM activities and the panel prefabrication for the East County Library project. Working to ensure all trades were in alignment with deliverables and schedule expectations was imperative when working with CLT. During BIM coordination, every mass timber panel was reviewed for required penetrations, embedded items, and support loads. These details were coordinated and approved by the structural engineer, timber manufacturer, and construction team prior to panel fabrication, allowing for early procurement and efficient installation by all trades. We successfully coordinated utilities to preserve exposed wood aesthetics by eliminating unnecessary exposed runs, consolidating riser groups, routing systems through beam pockets, utilizing column wraps, and strategically locating systems while maintaining the architectural intent. Our efforts on this project were imperative to maintain the overall project schedule and eliminate re-work.