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Improving HUD Housing Seismic Safety With Minimal Disruptions To Occupants

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hud seismic assessment

HUD housing is for fixed-income, low-income, and disadvantaged people that have trouble getting other housing. VIE therefore takes its job seriously and carefully evaluates seismic risk to these buildings and develops recommendations to improve the seismic safety of these buildings without disrupting the occupancy, as these are usually fully occupied with a long waiting list to get in.

HUD housing is important to people that need it. When we review it, we find ways to ensure that it’s safe. When things need to be improved, we find a way to do this in the best way possible for all parties involved. 

How Seismic Activity Disproportionately Affects Disadvantaged Communities

Natural disasters have wide-ranging costs beyond property damage, such as negative impacts to social, physical, and economic well being, particularly for disadvantaged communities. 

Federally assisted housing accounts for about 10% of rental housing in the United States. Previous natural disasters, such as Hurricane Katrina, suggest that those living in federally assisted housing are less likely to return to their pre-disaster home than individuals who are homeowners or market-rate renters. Research suggests that rental housing can suffer greater impacts from natural disasters than owner-occupied housing, particularly multifamily and duplex structures. 

hud housing seismic safety

While federal assistance programs are in place to aid in the aftermath of large-scale disasters, vulnerable populations often don’t qualify for disaster loans, HUD funding can take years to reach those who need it, and more. Those with lower incomes may be pushed into homelessness or debt and financial insecurity, and are thus at significant risk of permanent displacement and financial hardship.

This results in disparate recovery rates for the neediest households. Challenges begin before disaster even strikes, with a lack of education on resources available, receiving adequate support, and whether or not housing is up-to-code for current seismic standards. As such, it is imperative that these communities be given as much assistance as possible – which includes housing that is up to current seismic code. 

Improving Seismic Safety Of HUD Housing

Natural hazards pose a significant threat to HUD housing. More than 30% of federally assisted housing units are at relatively high risk from natural disasters across the country. Built environments need the ability to withstand the impacts of earthquakes and natural hazards in order to mitigate loss of life and property and negative effects to the economy. 

Governments from federal to state levels play critical roles in disaster recovery and protecting communities against future losses. Seismic risk assessments and seismic retrofits to meet building codes are one such way to support community resilience. Seismically resilient housing helps to mitigate the disruption from natural disasters as much as possible.

seismic safety for airports

Seismic risk assessments are used in order to understand and manage seismic risks, such as site and building stability and damageability of building contents. Retrofitting when necessary, such as by reinforcing walls and supports, mitigates damage from ground movement, thus enhancing protection for those who live in these structures. 

Seismic risk assessments can take different forms according to client needs. Depending on the risks, some assessments may require more detailed studies than others. Financing can be a challenge in advancing seismic retrofits, but hazard mitigation grants, as from FEMA, incentivize property owners to take appropriate action. 

Keeping People Safer With Seismic Risk Assessments From VIE

As those who use HUD housing are disadvantaged, it is especially important to ensure that seismic reviews can be completed with minimal disruption to the occupants. Those in federally-assisted housing are some of the most vulnerable people with the fewest resources, with the least ability to prepare for disaster and recovery. Improving seismic safety is crucial for all in seismically hazardous areas, as HUD housing often is.

VIE is mindful of client needs. VIE has performed seismic assessment reports and probable maximum loss studies for hundreds of buildings in the Western United States. The experienced engineers at VIE use customized assessment methods for evaluations that conform to HUD requirements and project-specific criteria. 

To learn more about what VIE Engineers can do for you or about any of our previous projects, contact us today. We take pride in making structures safer for all types of clients, from those involved in HUD housing to government entities, financial institutions, and more.

Filed Under: seismic bracing, seismic assessments

Airports are important components of transportation systems and economies. As such, seismic safety for airports cannot be overstated. In seismically hazardous areas, airport infrastructures undergo meticulous planning and work in order to be as prepared as possible. Downtime following a seismic event can be decreased with appropriate measures, while the life safety of the infrastructure is improved.

Here is an overview of crucial seismic concerns an airport may face, the impacts earthquakes can have on an airport, and how seismic risk can be mitigated.

Seismic Concerns For Airports

seismic safety for airports

There are many seismic concerns airports face, from soil liquefaction under runways to structural and nonstructural damage. Knowledge, management, and mitigation of risk are key to minimizing potential damage, maintaining functionality, and resuming operations sooner than later after seismic events. 

Following earthquakes of significant magnitudes, the soil can liquify and settle, which can result in runways cracking. This can cause them to be unusable for aircraft. Structures may sustain damage and collapse. Nonstructural systems may fall down without appropriate bracing, resulting in more extensive and expensive damage. 

Loss of airport functionality would not only impact the local economy and transportation, but can have national and international implications, as well. 

How Earthquakes Can Affect Airports

The consequences of a seismic event would depend on what part of the infrastructure is affected. When an earthquake strikes, airports evacuate terminals and close down until it is deemed safe to reopen and resume operations. While airplanes in flight are not physically impacted by earthquake activity, air traffic can be dependent on what happens on earth. When an earthquake happens, flights can be delayed, canceled, or redirected. 

seismic safety for airports

Depending on the magnitude of the earthquake and how prepared the structures are, the airport may experience no damage, maintaining full operationality. It may maintain life safety while having experienced moderate damage with no collapse. In the worst case scenario, it may be a total loss, with complete collapse. Significant damage can result from unrestrained MEP systems, beyond loss of system functionality.

Airports in seismic zones must take appropriate measures to meet seismic codes. With proper preparation, potential damage in the event of an earthquake can be mitigated. This helps maintain functionality and reduces the downtime following a seismic event. 

Implementing Seismic Safety For Airports

Earthquake risk assessment is necessary for any airport in seismically hazardous areas. With proper risk assessment, appropriate measures can be taken to implement appropriate safety measures for airports. This extends from runways construction to the materials used in construction of terminals to seismic bracing of nonstructural systems, such as the mechanical, electrical, and plumbing (MEP) systems. 

Structural engineers of record (SEOR) and mechanical and electrical design engineers work together to meet performance delegations on a project. With coordination between the SEOR, MEP design firm, and bracing design firms, performance specifications can be met, even in congested areas of facilities. 

Improve Seismic Safety For Airports With VIE

VIE provides innovative seismic solutions to help clients mitigate hazards in their facilities. Among the hundreds of clients VIE has done work for over the past 40+ years are aircraft facilities. VIE is very familiar with the challenges such highly congested areas can present for nonstructural bracing, and is here to offer effective solutions to improve the seismic safety of airports. Our solutions have been tested by seismic events with success. 

salt lake city international airport UT

VIE has been continuously doing work for the $4.5 billion Salt Lake City International Airport Terminal Replacement Project since 2019. The first phase of VIE’s work was put to the test when a 5.7 earthquake struck the Salt Lake City area in March 2020. The airport experienced minimal downtime in general, and no downtime for these non structural systems. To learn more about our work on the Salt Lake City International Airport, head over to our project page here: Seismic Bracing for the Salt Lake City International Airport.

To learn more about VIE’s seismic engineering services, please don’t hesitate to contact us today. 

Filed Under: seismic bracing

While no one can predict exactly when the next earthquake will strike, taking measures to protect buildings with seismic bracing is always beneficial. It’s far more economical to mitigate damage than try to repair it after an earthquake. However, the financial impact of meeting seismic requirements often isn’t realized until after project budgets have been set and contractors are doing the work. Many teams are caught by surprise by new variables and their associated cost implications. 

VIE empowers clients to achieve cutting-edge bracing solutions while also reducing seismic bracing costs through innovative techniques. Our code-compliant designs provide clients with the least cost, most technically effective bracing that improve the safety of structures, reduce seismic damage, and limit downtime following a seismic event.

Factors Involved In Seismic Bracing Costs

There are many factors involved in seismic bracing costs. Some of which are as follows:

seismic bracing costs
  • Seismic bracing must meet code requirements. Code requirements vary from the state level to more stringent county levels. Code regulations safeguard life safety. Changes and adoptions of code and their related cost implications can catch project teams by surprise. 
  • Concrete anchor attachment values have been reduced per the ASCE 7-16.
  • Seismic bracing can be reduced or eliminated through in-depth understanding of requirements and effective design. Seismic code allows for exclusion of items if suspended tightly to the structure.
  • Labor significantly impacts seismic bracing costs. Cheaper quotes do not always equal less expensive solutions. The more brace locations there are, the more labor is required to install the braces.

A Very Important Difference Between Higher And Lower Costs

Labor costs are a significant part of seismic bracing costs. When bidding on a project, there can be drastic differences between quotes. While companies may opt for (apparently) cheaper quotes in an effort to reduce seismic bracing costs, this is not always a less expensive solution. This is because the number of brace locations can drive up labor costs. 

More Locations = Higher Costs

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To reduce seismic bracing costs, look to a reduction in bracing locations. VIE reduces the total number of brace installation through using actual loads, rather than conservative, upper-bound loads. Our use of advanced procedures can significantly reduce the load percentage.

For example, VIE’s designs show specific brace locations, rather than conservative designs that just call out very conservative bracing spacings. For most projects, VIE’s approach reduces the number of braces required by 30% or more than commonly used simplified methods. VIE’s engineers utilize more sophisticated analysis, such as to avoid bracing every tier of multi-tier trapezes. The use of specific brace locations reduces the total number of braces, which ergo reduces your seismic bracing costs. 

Avoid Over-Engineering And Increasing Project Costs

Meeting seismic requirements is more than simply meeting building code. Overly conservative designs meant just to meet code and that lack an in-depth understanding of code and its requirements can drive up project costs. While over-engineering may seem like the safe option, it is unnecessary and expensive. 

Working with engineering firms that understand code requirements and what is and isn’t necessary increases the preparedness of your structure for seismic events while also providing you with enhanced value. Effective seismic design necessitates practical understanding of seismicity and how structural and non-structural components respond. Such designs specify exactly where braces need to go, which prevents unnecessary bracing, and thus, prevents higher costs. 

equipment anchorage design VIE Engineers Ogden, UT

Sophisticated Analysis And More Advanced Procedures To Reduce Seismic Bracing Costs

VIE Engineers compute actual loads and take into account dynamic properties of non-structural systems. This typically results in a reduction of 30% or more in brace locations in comparison to conservative designs. This reduces the overall cost of the project by reducing the amount of braces required, and more significantly, by reducing contractor labor costs required for brace installation. 

Our project-specific designs provide significantly enhanced value compared to the use of static design methods. Beyond the design itself, we understand design reviews may be needed. Our engineers provide field support throughout projects, including training contractors in brace installation at no additional cost. We eliminate confusion by specifying precisely which brace types are needed. 

We work with Connectors for Construction to provide seismic bracing kits, and specifically size and label them for specific locations on our drawings. Through working with professional engineers who understand project-specifics and actual load levels, you can reduce seismic bracing costs while ensuring your structure is as safe as possible. 

Contact VIE Engineers for more information about our seismic engineering services and the projects we’ve completed.

Filed Under: seismic bracing

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