https://www.insurerbrain.com/w/index.php?action=history&feed=atom&title=Definition%3AConstruction_class 2026-06-14T01:52:51Z Revision history for this page on the wiki MediaWiki 1.43.8 https://www.insurerbrain.com/w/index.php?title=Definition:Construction_class&diff=10631&oldid=prev 2026-03-11T16:50:15Z

<p>Bot: Creating new article from JSON</p> <p><b>New page</b></p><div>🧱 &#039;&#039;&#039;Construction class&#039;&#039;&#039; is a classification system used by [[Definition:Underwriting | underwriters]] and [[Definition:Rating | rating]] organizations to categorize buildings and structures based on the materials and methods used in their construction — a fundamental variable in determining [[Definition:Property insurance | property insurance]] [[Definition:Premium | premiums]] and [[Definition:Coverage | coverage]] terms. In the insurance industry, construction class directly influences how a structure is expected to perform under fire, wind, earthquake, and other [[Definition:Peril | perils]], making it one of the first data points an underwriter reviews when evaluating a [[Definition:Risk | risk]].<br /> <br /> 📊 Most rating frameworks — including those developed by [[Definition:Insurance Services Office (ISO) | ISO]] — group buildings into broad construction classes such as frame, joisted masonry, non-combustible, masonry non-combustible, modified fire-resistive, and fire-resistive. Each class reflects the building&#039;s structural skeleton and exterior walls: a wood-frame dwelling falls into the most combustible category, while a steel-and-concrete high-rise earns the most favorable fire-resistive designation. [[Definition:Underwriting | Underwriters]] use the assigned class to select base rates, apply [[Definition:Rating factor | rating factors]], and set [[Definition:Deductible | deductible]] options. Beyond fire, construction class also informs [[Definition:Catastrophe modeling | catastrophe modeling]] outputs — a masonry building in a seismic zone faces different damage curves than a steel moment-frame structure, and windstorm vulnerability varies sharply between classes in coastal regions.<br /> <br /> 🔑 Getting the construction class right is not a mere administrative exercise. Misclassification can lead to [[Definition:Underinsurance | underinsurance]] or [[Definition:Overinsurance | overinsurance]], mispriced [[Definition:Premium | premiums]], and disputes at the time of a [[Definition:Claims | claim]]. For [[Definition:Commercial property insurance | commercial property]] [[Definition:Insurance broker | brokers]], verifying construction class through site inspections, building plans, or third-party reports is a core part of the submission process. As building codes evolve and new materials — such as cross-laminated timber — enter the market, insurers must continually update their construction class frameworks to ensure that [[Definition:Risk classification | risk classification]] keeps pace with how structures are actually being built.<br /> <br /> &#039;&#039;&#039;Related concepts:&#039;&#039;&#039;<br /> {{Div col|colwidth=20em}}<br /> * [[Definition:Property insurance]]<br /> * [[Definition:Risk classification]]<br /> * [[Definition:Insurance Services Office (ISO)]]<br /> * [[Definition:Catastrophe modeling]]<br /> * [[Definition:Fire insurance]]<br /> * [[Definition:Building code]]<br /> {{Div col end}}</div>

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