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About us

Specialist Structural Engineers for Large-Scale Roof Systems

A-1 Services Roofing Specialists specializes in the engineering, analysis, and evaluation of large commercial and industrial roof structures. Our work is focused on buildings where roofs require advanced structural understanding due to their size, complexity, loading demands, and operational requirements. We support projects including warehouses, distribution centers, shopping centers, manufacturing facilities, logistics hubs, industrial plants, aviation facilities, and other large-scale commercial developments. These buildings often require roof structures that span significant distances, accommodate heavy mechanical equipment, withstand demanding environmental conditions, and maintain long-term structural performance under continuous operation. Our specialization allows us to focus deeply on the technical challenges associated with large roof systems. From early structural concepts through detailed engineering documentation, we develop solutions that consider structural behavior, material efficiency, constructability, and the specific requirements of each facility.

Our Specialization

Large commercial roofs are more than simple overhead structures. They form a critical part of the building's overall structural system and must safely transfer a wide range of forces while supporting the functional requirements of the facility below. A warehouse roof, for example, may need to provide large uninterrupted spaces for storage and automation systems while supporting rooftop mechanical equipment, lighting systems, fire protection services, and future operational changes. A shopping center roof may require coordination between architectural features, retail spaces, skylights, mechanical systems, and complex building layouts. Industrial facilities may introduce additional challenges through heavy equipment loads, specialized processes, and demanding operating environments. Our engineers understand these project-specific requirements and develop structural solutions tailored to the intended use of each building. We focus on creating roof systems that achieve the necessary balance between structural performance, efficiency, durability, and practicality.

Engineering Affiliations & Expertise

American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE)
ASHRAE affiliation strengthens our understanding of building performance, energy efficiency, thermal behavior, and environmental conditions influencing the engineering of effective roof systems.
International Building Performance Simulation Association (IBPSA)
IBPSA affiliation connects our engineers with advanced building-performance simulation practices, supporting deeper analysis of energy, thermal conditions, moisture behavior, and whole-building performance.
Structural Engineers Association of America (SEA)
SEA affiliation reinforces the structural expertise behind our roof engineering, supporting continued engagement with structural analysis, loading, resilience, safety, and building-performance practices.

Technical Expertise

Our experience covers a wide range of commercial roof engineering applications, including new roof design, existing structure evaluations, structural modifications, and design optimization.

We provide engineering services for:

  • - Long-span roof structures
  • - Steel roof framing systems
  • - Wind uplift design
  • - Rooftop equipment support structures
  • - Roof trusses and large structural members
  • - Structural load assessments
  • - Roof strengthening and retrofit solutions
  • - Structural efficiency studies
  • - Independent design reviews
Our work involves evaluating how roof systems respond to gravity loads, environmental forces, equipment loads, and operational requirements. We consider the interaction between primary framing, secondary members, structural supports, and building systems to develop designs that perform as intended throughout the life of the structure.

Delivering Complete Engineering Solutions

Our role is to provide clients with the technical information required to successfully design, approve, and construct complex roof structures. Every project is supported by detailed engineering documentation developed to clearly communicate the structural design intent.
Our deliverables may include:
  • Structural calculations
  • Engineering reports
  • Roof framing plans
  • Structural details
  • Design drawings
  • Load assessment documentation
  • Retrofit and strengthening details
  • Technical recommendations
These documents provide architects, contractors, fabricators, developers, and building owners with the information needed to coordinate, review, and implement the structural solution. Clear engineering documentation is essential for large projects where multiple disciplines must work together. Our designs are developed with careful consideration of coordination requirements, construction practicality, and the needs of all project stakeholders.