---
title: WSRB Blog | Construction Class
description: Construction Class | Get the latest updates on property insurance industry trends and WSRB product launches and learn how to get the most from your subscription.
---

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#### [About the Company](https://www1.wsrb.com/about)

Who we are and how we serve insurers, agents, and Washington state residents.  

#### [CEO Perspective](https://www1.wsrb.com/ceo-perspective-wsrb)

Engaging thought leadership on key insurance industry issues from our CEO. 

#### [Meet the Team](https://www1.wsrb.com/meet-the-team)

Get to know the team behind WSRB’s trusted data and excellent customer service. 

#### [Careers](https://www1.wsrb.com/careers)

Learn about the benefits of working at WSRB and apply for open positions.  

#### [Underwriting Property](https://www1.wsrb.com/resources/underwriting-property-risks)

A guide to key risks in Washington state: fire and earthquakes.

---

#### [Video Hub](https://www1.wsrb.com/video)

Expert webinars, timely discussions, and in-depth conversations with industry leaders.. 

#### [Commercial Property](https://www1.wsrb.com/risk-assessment-guide)

Information on loss costs, policy rating, and assessment tools.  

---

#### [Industry Toolkit](https://www1.wsrb.com/resources/industry-toolkit)

Links to help you work smarter and serve your customers.  

#### [Protection Classes](https://www1.wsrb.com/resources/public-protection)

The evaluation process explained from start to finish.

---

#### [WSRB Blog](https://www1.wsrb.com/blog)

News on emerging risks as well as our latest products. 

#### [Library](https://www1.wsrb.com/library)

In-depth content on essential insurance topics.

---

#### [InsuranceEDGE](https://www1.wsrb.com/insuranceedge)

Weekly newsletter covering the P/C industry, curated by our experts. 

 

[![WSRB-Horiz_Logo_RGB](https://www1.wsrb.com/hs-fs/hubfs/images/logos/WSRB-Horiz_Logo_RGB.png?width=150&height=51&name=WSRB-Horiz_Logo_RGB.png "WSRB-Horiz_Logo_RGB")](https://www1.wsrb.com/)

- [HOME](https://www1.wsrb.com)
- [COMPANY](https://www1.wsrb.com/about)
- [SOLUTIONS](https://www1.wsrb.com/solutions)
- RESOURCES 
    - [UNDERWRITING PROPERTY](https://www1.wsrb.com/resources/underwriting-property-risks)
    - [COMMERCIAL PROPERTY](https://www1.wsrb.com/resources/risk-assessment-guide)
    - [PROTECTION CLASSES](https://www1.wsrb.com/resources/public-protection)
    - [LIBRARY](https://www1.wsrb.com/library)
    - [HELP CENTER](https://www1.wsrb.com/video)
    - [INDUSTRY TOOLKIT](https://www1.wsrb.com/resources/industry-toolkit)
    - [WSRB BLOG](https://www1.wsrb.com/blog-old)
    - [INSURANCEEDGE](https://www1.wsrb.com/insuranceedge/signup)
- [CONTACT](https://www1.wsrb.com/contact)

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**

** **

#### [About the Company](https://www1.wsrb.com/about)

Who we are and how we serve insurers, agents, and Washington state residents. 

#### [CEO Perspective](https://www1.wsrb.com/ceo-perspective-wsrb)

Engaging thought leadership on key insurance industry issues from our CEO. 

#### [Meet the Team](https://www1.wsrb.com/meet-the-team)

Get to know the team behind WSRB’s trusted data and excellent customer service. 

#### [Careers](https://www1.wsrb.com/careers)

Learn about the benefits of working at WSRB and apply for open positions.  

#### [Underwriting Property](https://www1.wsrb.com/resources/underwriting-property-risks)

A guide to key risks in Washington state: fire, wildfire, and earthquakes.

---

#### [Video Hub](https://www1.wsrb.com/video)

Expert webinars, timely discussions, and in-depth conversations with industry leaders.. 

#### [Commercial Property](https://www1.wsrb.com/risk-assessment-guide)

Information on loss costs, policy rating, and assessment tools.  

---

#### [Industry Toolkit](https://www1.wsrb.com/resources/industry-toolkit)

Links to help you work smarter and serve your customers.  

#### [Protection Classes](https://www1.wsrb.com/resources/public-protection)

The evaluation process explained from start to finish.

---

#### [WSRB Blog](https://www1.wsrb.com/blog)

News on emerging risks as well as our latest products. 

#### [Library](https://www1.wsrb.com/library)

In-depth content on essential insurance topics.

---

#### [InsuranceEDGE](https://www1.wsrb.com/insuranceedge)

Weekly newsletter covering the P/C industry, curated by our experts. 

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- [HOME](https://www1.wsrb.com)
- [COMPANY](https://www1.wsrb.com/about)
- [SOLUTIONS](https://www1.wsrb.com/solutions)
- RESOURCES 
    - [Underwriting Property](https://www1.wsrb.com/resources/underwriting-property-risks)
    - [Commercial Property](https://www1.wsrb.com/resources/risk-assessment-guide)
    - [Protection Classes](https://www1.wsrb.com/resources/public-protection)
    - [Library](https://www1.wsrb.com/library)
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## [Understanding Rule 85: Construction Classes](https://www1.wsrb.com/blog/understanding-rule-85-construction-classes)

 September 2, 2025

| 4 min read

[Read More →](https://www1.wsrb.com/blog/understanding-rule-85-construction-classes)

### Categories

- [Underwriting (37)](https://www1.wsrb.com/blog/tag/underwriting)
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- [Protection Class (14)](https://www1.wsrb.com/blog/tag/protection-class)
- [Earthquake Risk (13)](https://www1.wsrb.com/blog/tag/earthquake-risk)
- [Sprinklers (12)](https://www1.wsrb.com/blog/tag/sprinklers)
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- [Public Protection (8)](https://www1.wsrb.com/blog/tag/public-protection)
- [GIS and Mapping (7)](https://www1.wsrb.com/blog/tag/gis-and-mapping)
- [History (6)](https://www1.wsrb.com/blog/tag/history)
- [Earthquake (4)](https://www1.wsrb.com/blog/tag/earthquake)
- [Compliance (3)](https://www1.wsrb.com/blog/tag/compliance)
- [Fun (3)](https://www1.wsrb.com/blog/tag/fun)

### Sign up for blog notifications

[![](https://www1.wsrb.com/hubfs/unreinforced-header.png) ](https://www1.wsrb.com/blog/unreinforced-masonry-buildings-a-hidden-danger)

[Construction Class](https://www1.wsrb.com/blog/tag/construction-class)

### [Unreinforced Masonry Buildings: A Hidden Danger](https://www1.wsrb.com/blog/unreinforced-masonry-buildings-a-hidden-danger)

 May 24, 2022

| 5 min read

[![](https://www1.wsrb.com/hubfs/friday-13-resized.png) ](https://www1.wsrb.com/blog/mystery-of-missing-13th-floor)

[Construction Class](https://www1.wsrb.com/blog/tag/construction-class)

### [The Mystery of the Missing 13th Floor](https://www1.wsrb.com/blog/mystery-of-missing-13th-floor)

 May 13, 2022

| 4 min read

[![](https://www1.wsrb.com/hubfs/mezzanine.png) ](https://www1.wsrb.com/blog/mezzanine-vs-floor-whats-the-difference)

[Construction Class](https://www1.wsrb.com/blog/tag/construction-class)

### [Mezzanine vs. Floor: What's the Difference?](https://www1.wsrb.com/blog/mezzanine-vs-floor-whats-the-difference)

 February 5, 2020

| 2 min read

[![](https://www1.wsrb.com/hubfs/modified%20fire%20resistive.png) ](https://www1.wsrb.com/blog/the-basics-on-construction-classes-part-five-modified-fire-resistive)

[Construction Class](https://www1.wsrb.com/blog/tag/construction-class)

### [The Basics on Construction Classes: Modified Fire-Resistive](https://www1.wsrb.com/blog/the-basics-on-construction-classes-part-five-modified-fire-resistive)

 September 12, 2017

| 2 min read

[![](https://www1.wsrb.com/hubfs/seattle%20fire%20resistive%202.png) ](https://www1.wsrb.com/blog/the-basics-on-construction-classes-part-six-fire-resistive)

[Construction Class](https://www1.wsrb.com/blog/tag/construction-class)

### [The Basics on Construction Classes: Fire-Resistive](https://www1.wsrb.com/blog/the-basics-on-construction-classes-part-six-fire-resistive)

 September 12, 2017

| 3 min read

[![](https://www1.wsrb.com/hubfs/liquor%20store%20masonry%20building.png) ](https://www1.wsrb.com/blog/the-basics-on-construction-classes-part-four-masonry-non-combustible)

[Construction Class](https://www1.wsrb.com/blog/tag/construction-class)

### [The Basics on Construction Classes: Masonry Non-Combustible](https://www1.wsrb.com/blog/the-basics-on-construction-classes-part-four-masonry-non-combustible)

 September 6, 2017

| 2 min read

[![](https://www1.wsrb.com/hubfs/joisted%20masonry%201.png) ](https://www1.wsrb.com/blog/the-basics-on-construction-classes-part-two-joisted-masonry)

[Construction Class](https://www1.wsrb.com/blog/tag/construction-class)

### [The Basics on Construction Classes: Joisted Masonry](https://www1.wsrb.com/blog/the-basics-on-construction-classes-part-two-joisted-masonry)

 August 22, 2017

| 2 min read

[![](https://www1.wsrb.com/hubfs/non-combustible%20steel%20building%202.png) ](https://www1.wsrb.com/blog/the-basics-on-construction-classes-part-three-non-combustible)

[Construction Class](https://www1.wsrb.com/blog/tag/construction-class)

### [The Basics on Construction Classes: Non-Combustible](https://www1.wsrb.com/blog/the-basics-on-construction-classes-part-three-non-combustible)

 August 22, 2017

| 2 min read

[See More](https://www1.wsrb.com/blog/tag/construction-class/page/2)

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