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Tom Little is President and CEO of Floodproofing.com. A managerial manager of the floodplant, little did the Committee that developed the ASCE standards 24-24. Opinions are typical of the author.
Mother Nature continues to remember -our strength, often challenging our understanding and resilience. If we want to protect the houses, companies and critical infrastructure of our nation, we must adapt to their unforeseen events.
This is the basis of the most recent and more transformer changes American Society of Civil Engineers Design and Construction Resistant to Flood (ASCE 24-24) Rules since first introduced in 1998.
It was presented at the beginning of the year, Asce 24-24 includes 29 changes since the previous edition was published in 2014. These are not simple technical adjustments to the language of standards; These are significant changes in the way we tackle design and construction in flood danger areas based on the lessons that Mother Nature taught us over the last decade.
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The most significant of these changes is in the way of defining a regulated flood danger area. The ASCE 24-24 significantly extended the flood danger surface regulated from the floodplant of 100 years to the flood plain of 500 years. Design and construction requirements are now applied to these broader areas. This is not an arbitrary decision of the Committee that wrote the standards as ASCE 24-24, on which I served as a member; This is a decision based on the field experience and the lessons learned from storms such as Hurricane Harvey, Ida, Ian and others.
Another significant change in standards are elevation requirements. The new standard minimum flood elevation requirements established for buildings in flood danger areas based on flood design class.
These requirements become more demanding depending on the type of building that is being built, ranging from 100 years to elevations of 1,000 years. For example, a single -family home would have a lower elevation requirement than a school or hospital would have. This provides greater protection for those critical infrastructure facilities that are vital to restoring normality in our communities after important flood events.
Dry-in-running solution performance tests are another important change to the ASCE 24-24. Now, in order for dry flood products to be considered as part of the design areas of flood danger, they must go through rigorous tests and fulfill the minimum performance standards established by the North -American National Standard for Flood Mitigation Teams (Ansi/FM 2510).
In this way, both dry and dry passive barriers dry and other dry dry solutions can withstand the hydrostatic pressure of floodable water and the impact of the waste commonly on floodable water.
Hard lessons updates
As the industry continues to evolve, it is encouraged to see a growing emphasis on designed, proven and certified solutions. Companies that invest in performance, compliance and innovation help increase the bar and to create confidence in the market, establishing a clear standard so that it should be a reliable protection of floods.
Another lesson learned from previous flood events that is reflected in the ASCE 24-24 is the annual inspection, maintenance and exercises necessary for the deployment of dry dry land solutions. Too often, the people who served on the ASCE Rules 24-24 Committee listened to reports from buildings equipped with dry resistance solutions that were devastated by storms because these solutions were not properly deployed or, in some cases, were not deployed at all.
The annual inspection and maintenance of dry flood resistance solutions, such as flood barriers, will ensure that they are in operation and scheduled deployment exercises will help ensure that the building’s maintenance staff is properly formed and practice these solutions before the storms.
In a related change, the updated standards specify that if dry flood measures require human intervention to activate -or implement, a flood warning system must evaluate the deployment responsible for 12 hours until 36 hours in advance based on the building’s flood design class.
Weak construction codes are expensive
These are some of the most significant updates of the ASCE 24-24 standards. There are many more with the same intention to help mitigate severe flood damage and protect the critical infrastructure of our nation.
The new standards have already received some impetus, especially from the residential construction industry that argues that strictest standards will promote the cost of construction and make people even more difficult for homes.
I undoubtedly understand and sympathize with this concern, but our nation has stuck in a continuous cycle of flood -destroyed houses and rebuilt in the same land according to the same obsolete standards. This cycle eventually costs housing owners – and our nation – rather than adopting new standards.
There is no doubt that we will learn additional lessons of the fury of nature in the coming years, but with these new standards, we can make significant progress in the construction of stronger and more resistant communities to take an important step to break the disaster cycle and the recovery of the economy in which our nation is currently stuck.
