The PURPLE Book®
Trusted fire-rated assembly solutions
The PURPLE Book® is the industry's leading resource for fire-rated assemblies in commercial construction. Designed for today’s building demands, it delivers trusted guidance for architects, contractors, and inspectors seeking code-compliant solutions.
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Assemblies that deliver performance
The PURPLE Book® delivers expanded details, drawings and answers to common fire-rated assembly questions.
Technical Guides
Comprehensive resource guides on demand
The PURPLE Book is one of our series of National Gypsum Company technical guides that have proven to be trusted resources for architects, inspectors, contractors and builders. Contact your construction design manager or sales representative to request hard copies or click below to download.
Fire & Sound Assembly Selector
Explore our extensive database to streamline your planning and estimating. Use filters to select project specifications, such as hourly fire rating, assembly type and STC rating. Select your assembly and access detailed instructions with design information and test results to support your documentation.
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