{"id":20493,"date":"2026-06-15T12:39:47","date_gmt":"2026-06-15T17:39:47","guid":{"rendered":"https:\/\/tilt-up.org\/tilt-uptoday\/?p=20493"},"modified":"2026-06-15T12:40:19","modified_gmt":"2026-06-15T17:40:19","slug":"before-the-building","status":"publish","type":"post","link":"https:\/\/tilt-up.org\/tilt-uptoday\/2026\/06\/15\/before-the-building\/","title":{"rendered":"Before the Building"},"content":{"rendered":"\n
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Tiered retaining walls and mass grading operations reshape the 165.2-acre Haas Automation site in Henderson, Nevada, where extensive reconfiguration was required to establish a level building pad for the 2.5-million-square-foot manufacturing campus.<\/p>\n\n\n\n

Haas Automation is constructing a nearly 2.5-million-square-foot manufacturing facility on a 165.2-acre site in Henderson, Nevada\u2014making it one of the largest single-roof industrial buildings currently underway in the region.<\/p>\n\n\n\n

When crews first mobilized, the ground conditions were immediately apparent.<\/p>\n\n\n\n

\u201cIt looked like the surface of Mars.\u201d<\/p>\n\n\n\n

The steeply sloped desert site\u2014located beneath the approach path to Henderson Executive Airport\u2014presented grading, access, and sequencing challenges from the outset. Before vertical construction could begin, the site itself had to be fundamentally reshaped.<\/p>\n\n\n\n

Regrading the Site<\/strong><\/p>\n\n\n\n

From the beginning, the owner established a clear requirement: The finished building pad had to be level across the full footprint.<\/p>\n\n\n\n

Achieving that condition required extensive grading. In one corner of the site, fill depths approached 60 feet; in another, excavation reached approximately 27 feet. Elevation differentials across the diagonal span of the property were eliminated through sustained earthmoving operations.<\/p>\n\n\n\n

Subsurface conditions governed the pace of work. The site consisted predominantly of caliche soil, a calcium-carbonate cement-like material common in arid regions of southern Nevada. Caliche soil behaves more like weak rock than conventional soil, exhibiting high compressive resistance and low permeability. Mechanical ripping was required to fracture the material, and once compacted, it proved difficult to rework.<\/p>\n\n\n\n

Initial grading activities were completed prior to the COVID-19 shutdown. The site then remained dormant for approximately four years, with retaining walls being partially completed during that period. When construction resumed in September 2024, the subgrade had reconsolidated significantly, requiring additional effort to reestablish workable surfaces for foundations and slab-on-grade placement.<\/p>\n\n\n\n

The stiffness and density of the caliche subgrade ultimately benefited slab performance by providing a stable bearing surface with limited moisture exchange, reducing differential drying and restraining slab movement.<\/p>\n\n\n\n

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Earthmoving operations progressed across the Henderson site, where dense caliche soils and significant elevation changes governed early excavation and grading activities.<\/p>\n\n\n\n

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Aerial view of the regraded site illustrates the scale of the tiered retaining wall system used to establish a continuous building plateau for the Haas Automation campus.<\/p>\n\n\n\n

Retaining the Grade<\/strong><\/p>\n\n\n\n

Stabilizing the site required a tiered retaining wall system totaling just under 6,100 linear feet.<\/p>\n\n\n\n

Originally designed as cast-in-place construction, the system was reengineered to utilize tilt-up panels. Panels were detailed with flared bases and variable thicknesses to address load and geometry demands, with some deeper sections incorporating three distinct thickness profiles.<\/p>\n\n\n\n

The project includes<\/p>\n\n\n\n