Project Details:
- Location: 2401 S. Calaveras Pl, Ontario, CA 91761[cite: 9].
- Category: Single Family Residence (2-Story Wood Framing)[cite: 9].
- Design Codes: Compliant with the 2025 California Building Code (CBC) and ASCE 7-22[cite: 9].
Project Overview Located in Ontario, California, the Calaveras Residence is a two-story residential development[cite: 9]. Encanto Engineering served as the structural engineer of record, providing a comprehensive design package that includes detailed foundation plans, first and second-floor framing, and lateral force-resisting systems[cite: 9]. Our structural solutions are tailored to meet complex architectural needs while ensuring uncompromising safety and code compliance[cite: 9].
Technical Design Parameters The structural plans are engineered to withstand rigorous environmental and geotechnical demands:
- Seismic & Wind Design: The building is designed to meet Seismic Design Category D requirements and a baseline ultimate wind speed of 95 MPH (Exposure Category C)[cite: 9].
- Geotechnical Integration: Foundation designs are predicated on an assumed allowable soil bearing pressure of 1,500 psf[cite: 9].
- Expansive Soils Mitigation: The project incorporates specific guidelines for expansive soils[cite: 9]. Exterior bearing walls are supported on continuous footings reinforced with deformed rebar[cite: 9]. Furthermore, the subgrade beneath interior concrete slabs requires pre-saturation and a base of aggregate/sand over a moisture barrier membrane[cite: 9].
Core Materials & Specialized Components
- Reinforced Concrete: Foundation elements and slabs-on-grade utilize hard rock aggregate concrete with a 28-day compressive strength of 2,500 PSI, reinforced with ASTM A615/A615M (Grade 40 & 60)[cite: 9].
- Lumber & Engineered Wood: The primary structural framing relies on Douglas Fir-Larch (DF-L) lumber[cite: 9]. For longer structural spans, the design incorporates high-capacity Glulam 24F-V4 beams[cite: 9].
- Hardware Connections: The entire structural assembly is secured using ICC-ES evaluated metal connectors, hangers, and hold-downs from Simpson Strong-Tie, ensuring a continuous and robust load path[cite: 9].
