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Home > News > Company News > Crisp views and transparency with Vitro’s Solarban® 72 Starphire® glass

Crisp views and transparency with Vitro’s Solarban® 72 Starphire® glass

Post Time:Jul 26,2022Classify:Company NewsView:979



Photography by Tom Kessler



Strips of Spanish limestone and curtain-wall alternate to create a visually interesting façade for the new 17-story Multnomah Courthouse in Portland, OR, USA. Designed with Solarban 72® Starphire® glass by Vitro Architectural Glass, the floor-to-ceiling windows welcome in daylight and deliver beautiful vistas of Mount Hood and the Willamette River.

According to Bjorn Clouten, AIA, LEED® AP, Assoc. DBIA, a principal with the project’s architect SRG Partnership, the envelope design is meant to convey a sense of safety, openness and transparency.

Building occupants enter inside a spacious, light-filled and decorative lobby, reminiscent of an upscale hotel. “On each of the court floors, as you come up the elevator, you’re drawn to the view of the river,” said Clouten.


Photography by Tom Kessler


To deliver these crisp views, Solarban® 72 Starphire® glass was selected for its high visible light transmittance, exceptional clarity and superior solar control performance. In a standard one-inch insulating glass unit, Solarban® 72 Starphire® glass delivers visible light transmittance of 68 percent and a solar heat gain coefficient (SHGC) of 0.28.

The glazing played a key role in the architect’s four-layered symbolic presentation of a courthouse. The building’s interior displays the activity and energy taking place in the public spaces next to the courtrooms and the second layer of façade glass reinforces the transparent nature of justice. The third level is the structural, seismic design that represents stability and order, and the final layer showcases the irregularly-spaced glass and limestone panels symbolizing the people of the county.

An integrated project delivery model helped the team fine-tune the design and capture project efficiencies by on-boarding key subcontractors early on. Working in partnership with Hoffman Construction Company, façade consultant RDH, glazing contractor Washington Window & Door and fabricator Oldcastle BuildingEnvelope – Schofield, the building team was able to produce BIM designs and build full-scale mock-ups for early owner and stakeholder review.

The LEED® Gold-certified 460,000 square foot building achieved Architecture 2030 carbon reduction targets with a carefully calculated window-to-wall ratio, high-performance building envelope, radiant heating and cooling, displacement ventilation and rooftop solar panels.

The design team engineered the façade together with a structural thermal mass. This enables the structure to capture the solar heat gain through the floor-to-ceiling windows on the building’s east side. A radiant hydronic loop embedded in the concrete floor then absorbs the energy in the slab and redistributes it to the public spaces, thereby reducing heating loads on a clear winter morning by up to 20 percent.

Source: glassonlineAuthor: shangyi

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