Mankato Grey Vein-cut Limestone Crystal Black Granite
Washington State University
Integrus Architecture – Spokane, Washington
Hoffman Construction Co. – Portland, Oregon
The cladding system is a unique hybrid of mechanical anchors and a laid-up masonry system. Wind and seismic loads are accommodated through mechanically fastened clips, while gravity loads are transferred via shim stacks from course to course back to relieving angles that are anchored to the building’s structure. The stone joints in the cladding are open and only 1/8 inch wide, which requires special attention at the factory, and quality craftsmanship during installation to satisfy construction tolerances. The Mankato grey limestone presents a technical challenge in that it tends to discolor when exposed to the elements. The affects of this attribute are deliberately incorporated into the exterior design of the CUB, as it gives the stone a seasoned appearance, in line with the tone of the existing façade. For the interior applications, however, the design requires preservation of the material’s original colors and characteristics as it is appears when freshly quarried. This requires special handling and packaging as well as acute attention to storage procedures at the job site to avoid subjecting the stone to sunlight and the elements.
ST-1: Makato Grey Vein-cut Limestone
ST-2: Crystal Black Granite
U.S. Green Building Council LEED™ Certified