Professional Structural Engineering Services

S3DA offers a unique combination of both structural and MEP design services, which means less headache and better prices for you.

Structural Design Projects
Years in the Industry
Licensed in 45 States
Design, drafting and calculations

Design, drafting and calculations

New constructions, additions, remodeling and improvements
We do it all

New constructions, additions, remodeling and improvements

We have a special focus on


New design, additions, remodels & ADU


Commercial, education, healthcare, industrial & residential

Distribution systems & HVAC upgrades


One-story or multi-story construction

Multi-lot developments

Multiple detached residences or high-density apartments


Design of non-building structures

Retaining wall & site structure design

Seismic retrofit of existing buildings & structures


New design & tenant improvements

Commercial kitchen and food service facilities

Office (one-story to medium-rise), retail centers, restaurants

Mixed-use building


here are some of our projects

Structural design for Sunshine Express Carwash in Redding, CA
Blue Wave mixed-use hotel and apartment complex for Imperial Beach
Office remodelling for the Mission Towers in Santa Clara, CA
Conceptual structural and MEP design and full layouts for Single Family home
Conversion of duplex apartment building into a single family home
Marcelli residence in Charleston, SC
Ambulatory Surgery Center in Clayton, NC
The Oxford Restaurant in Lodi, CA, Tenant Improvement
Congregate living health facility in Inglewood, CA

Turnkey structural engineering solutions

We work with many types of structural systems including, wood and timber frames, structural insulated panels(SIP), insulated concrete forms (ICF), reinforced concrete and CMU block structures, custom steel and metal buildings as well as composite retrofit systems for building alterations. We do the structural design of your project from feasibility and system selection to detailed construction documents quickly and efficiently. This approach enables us to incorporate structural systems with building design while saving our clients time and money.

Engineered wood frame, Light Wood Frame, light gauge steel (cold form steel framing), steel frame, CMU and Concrete Buildings

Foundations comprising, Mat foundation, Conventional Pad & Footing System, Post-tensioned Slab on Grade & Cassion

Decks and Parking Structures

Retaining Walls

Green Roofs Structures

Seismic Evaluation and Retrofits

Let us know how we can help you

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Get A Free Quote