What You Need to Know: Commercial Seismic Upgrades

Seismic activity is a natural phenomenon that can have devastating effects on buildings and infrastructure. In regions prone to earthquakes, the risk is ever-present, making it crucial for building owners to prioritize seismic upgrades. These upgrades not only enhance safety but also ensure compliance with local building codes, protecting both property and lives. Whether you own an older building or one located in a high-risk seismic zone, understanding and implementing seismic upgrades is vital.

In today’s article, we will be discussing several steps owners can take to assess their seismic upgrade needs, and options available once those needs have been recognized. As always, a professional should be consulted before finalizing needs, plans, or budgets. Working with an accredited general contractor and engineer can help ensure this process is smooth and all regulations are met.

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Understanding Seismic Upgrades

Seismic upgrades are modifications made to a building’s structure and components to improve its ability to withstand earthquakes. These upgrades can be structural or non-structural depending on the needs or triggers of the upgrades. Changes may be required based on occupancy type, code changes, roof structure, local jurisdictions, or original building materials (especially in older buildings).

Types of Seismic Upgrades

• Structural Upgrades: These may include reinforcing load-bearing walls, adding shear walls, installing base isolators, and enhancing foundation strength. The goal is to improve the building’s overall stability and resistance to seismic forces.
• Non-Structural Upgrades: These may involve securing heavy equipment, retrofitting windows, and anchoring fixtures that could cause injury or damage if they become dislodged during an earthquake.

Assessing the Need for Seismic Upgrades

Is Your Building at Risk?

Several factors determine whether a building needs seismic upgrades:

• Age: Older buildings, especially those constructed before modern seismic codes, are often at higher risk due to their design and/or building materials.
• Location: Buildings in seismic zones are naturally at greater risk and may require more extensive upgrades. Check out this unique build we performed, which was constructed over a fault line in California.
• Construction Materials: The materials and methods used during construction affect a building’s seismic resilience. Some of the building types likely to be insufficient include:
  • Unreinforced masonry (URM), red brick or concrete masonry.
  • Unreinforced concrete buildings, often consisting of cast-in-place, unreinforced elements.
  • Older tilt-up concrete buildings with limited out-of-plane wall anchorage elements.
• Seismic History: Past performance during seismic events can indicate the need for upgrades. Even if the building didn’t exhibit catastrophic failures, small damages may indicate larger insufficiencies.

Conducting a Seismic Evaluation

To accurately assess your building’s needs, a seismic evaluation by a qualified structural engineer is essential. This assessment involves a thorough inspection of the building’s structure and components, identifying vulnerabilities, and recommending specific upgrades. A professional evaluation ensures that any necessary upgrades are both appropriate and compliant with local regulations.

Planning and Budgeting for Seismic Upgrades

Understanding the Costs

The cost of seismic upgrades can vary widely depending on several factors:

• Building Size and Complexity: Larger or more complex buildings often require more extensive upgrades.
• Type of Upgrade: Structural upgrades generally cost more than non-structural ones.
• Regulatory Compliance: Meeting local building codes and regulations may add to the overall cost. Additionally, specific permits or licensing may be required. Building upgrades often trigger ADA compliance upgrades, as well.

Financial Assistance

Fortunately, there are financial incentives, grants, and loans available to help offset the cost of seismic upgrades. Researching these options and applying for available funding can make the process more affordable. In Oregon,there are several options for commercial buildings thanks to the Seismic Rehabilitation Program.

Creating a Timeline

Seismic upgrades are a significant undertaking, and planning a realistic timeline is crucial. Factor in the time needed for planning, permitting, construction, and inspection to ensure the project stays on track and meets all regulatory deadlines. Take into consideration if your building needs to remain operational in different areas, or if neighboring businesses or neighborhoods have specific noise, dust, or construction ordinances.

Navigating Regulatory Requirements

Building codes and regulations related to seismic safety vary by location and are designed to protect occupants and property during an earthquake. Understanding and complying with these codes is essential when planning seismic upgrades.

Local vs. National Requirements

While national building codes provide general guidelines, local requirements can be more specific and stringent, especially in high-risk areas. Working closely with local authorities and ensuring that your upgrades meet or exceed these standards is crucial for both safety and legal compliance.

Permitting Process

Securing the necessary permits is a critical step in any seismic upgrade project. This process generally involves submitting detailed plans, undergoing inspections, and working with local building departments to ensure that all work is up to code.

Choosing the Right Contractor

Qualities to Look For

When selecting a contractor for seismic upgrades, experience and specialization are key. Look for a contractor with a proven track record in seismic retrofitting and who understands the unique challenges of your building type. Extensive knowledge of your city’s permitting and inspection processes is also important to ensure the project stays on schedule.

Experience and Credentials

A qualified contractor should have the necessary licenses, certifications, and insurance to perform seismic upgrades. Don’t hesitate to ask for references and review past projects to gauge their expertise. Your engineer or architect may be able to refer you to contractors they’ve worked with on past projects.

Collaborating with a Team

Seismic upgrades often require a multidisciplinary approach, involving engineers, architects, and contractors. Ensuring that these professionals work well together and have clear communication can make the project more efficient and successful. Good communication and proven attention to detail are key to choosing the right project manager.

Executing the Seismic Upgrade

The Upgrade Process

Seismic upgrades typically involve several steps, starting with the initial evaluation and planning, followed by the construction phase, and concluding with final inspections. The specific seismic upgrades a building needs depend on its construction type, age, and accessibility for completing the work. For instance:

• Unreinforced Masonry (URM): Seismic improvements for clay masonry may include the installation of steel/wood stud shear walls at the interior. This provides an internal lateral system that is secured to the brick exterior.  Interior structural steel frame systems can also be incorporated.
• Concrete Tilt-up: On these structures, the connection between the tilt walls and the roof structure is what most often fails in the event of an earthquake. Upgrades typically include the addition of strapping between the roof diaphragm and walls, and perhaps the addition of clips at the top of the tilt walls that allow for more movement between the panels.
• Unreinforced Concrete Buildings: Like URM buildings, older unreinforced concrete buildings were often constructed with no, or very minimal steel reinforcing.  Upgrade improvements can be similar to those under the URM designation.

Minimizing Disruption

Seismic upgrades can be disruptive, especially in occupied buildings. Planning the work in phases, scheduling construction during off-hours, and keeping occupants informed can help reduce the impact. Get more tips and tricks in our recent article about being a good neighbor during construction here.

Post-Upgrade Considerations

Ensuring Compliance

After the seismic upgrade is complete, verifying that the work meets all regulatory standards is essential. This involves final inspections, obtaining certifications, and ensuring that all necessary documentation is in order.

Maintenance and Inspection

Seismic upgrades are an investment in your building’s future, but they require ongoing maintenance and periodic inspections to remain effective. Regularly checking the integrity of the upgrades and addressing any issues promptly can extend the life of the retrofit and maintain compliance.

Insurance Implications

Updating your insurance policy to reflect the seismic upgrades can offer additional protection and potentially reduce premiums. Discussing these changes with your insurance provider is a smart step both pre- and post-upgrade.

Final Thoughts

Seismic upgrades are a critical investment in the safety and resilience of your building. By understanding the need, planning effectively, and working with experienced professionals, building owners can protect their property, occupants, and peace of mind. Whether you’re starting from scratch or looking to enhance an existing structure, the right approach to seismic upgrades can make all the difference.

If you’re considering a seismic upgrade, don’t wait until the next earthquake hits. Start planning now by consulting with a qualified structural engineer and exploring your options. Reach out to us for a consultation, and take the first step toward a safer, more resilient building today. Our teams can be reached here.