Structural Engineering in Wisconsin

Permit stuck waiting on a seal? Apex Grid's licensed engineers provide fast Structural review-and-seal for drawings in Wisconsin and across the state — reviewed under responsible charge and sealed for submittal to the applicable Wisconsin permitting authority. Typical turnaround is 3–5 business days once we have a complete package.

Structural engineering in Wisconsin is governed by snow and frost, not seismic — the state is effectively Seismic Design Category A everywhere, so lateral design centers on wind. Ground snow loads are high, commonly 30–40+ psf in the south and greater in the north, and drifting and unbalanced loads demand careful roof framing; snow is the load that most often controls Wisconsin roof design. Frost penetration is deep, often exceeding 48 inches in the north, so we set footings well below grade to prevent heave, and we detail for frost-protected shallow foundations where appropriate. Wind speeds around 105–115 mph, elevated by open-terrain and shoreline exposure, drive uplift resistance and continuous load paths. We design gravity and lateral systems to the statewide Wisconsin Commercial Building Code (SPS 361–366) and confirm the referenced IBC edition with SPS, since Wisconsin trails the model cycle.