Below-grade parking structures, whether topped by parks, highly-developed plazas, or occupied spaces, offer multiple design challenges. THP addresses these challenges by developing economical structural solutions that maintain open and inviting parking areas.
THP has developed strategies for the “roof” structures of underground garages that improve constructability and reduce the cost of supporting heavy landscaping and plaza features. These concepts facilitate surface drainage, simplify waterproofing, and can allow clear span parking bays below. Clear spans benefit security and wayfinding, both major concerns in below grade facilities. Our creative use of grading and areaways enhance ventilation and daylighting. We carefully select structural systems and circulation ramping patterns to minimize excavation and soil retention costs.