Paintsquare Fireproofing Series — The Dangers of Extrapolation – Properly Estimating Fire Protection Applications

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Sherwin-Williams Protective & Marine delivers world-class industry subject matter expertise, unparalleled technical and specification service, and unmatched regional commercial team support to our customers around the globe. Our broad portfolio of high-performance coatings and systems that excel at combating corrosion helps customers achieve smarter, time-tested asset protection. We serve a wide array of markets across our rapidly growing international distribution footprint, including Oil & Gas, Water & Wastewater, Bridge & Highway, Steel Fabrication, Flooring, Food & Beverage, Fire Protection, Marine, Rail and Power. For more information, visit

Applying the wrong fire protection coating thickness to a steel section could spell disaster in a fire situation. Applied too thin, the intumescent coating may not protect the steel for the rated time. Applied too thick, the coating may delaminate as it swells, leaving the steel substrate dangerously exposed. Neither scenario is acceptable, and specifiers and applicators must understand how to avoid them to not put people’s lives at undue risk.

Coating thickness errors commonly occur when specifiers make assumptions based on data extrapolated from the Underwriters Laboratories (UL) “Fire Tests of Building Construction and Materials” specification (ANSI/UL 263; ASTM E-119). Testing conducted by fireproofing manufacturers does not necessarily include every possible steel section size, leading some fireproofing manufacturers to make the mistake of extrapolating data and sharing that noncompliant information with specifiers — which can lead to coating thickness errors and the dangerous scenarios noted above. Tune in to this webinar to discover the dangers of extrapolating coating thickness data and how to avoid mistakes by working with qualified engineers to optimize fire protection coating specifications.

Learning Objectives
• Understand the dangers of extrapolating coating thickness data beyond UL’s maximum tested and assessed values;
• Learn why UL discourages the practice and how to avoid it to enhance safety for building occupants and first responders;
• Discover how to maintain UL compliance – and enhance fire protection outcomes – by optimizing the design of steel members to accurately specify coating thicknesses; and
•Learn how qualified engineers can help optimize intumescent coating thickness specifications using structural fire engineering design principles.


Troy Marshall, Fire Segment Director – The Americas
Sherwin-Williams, Protective & Marine

Troy Marshall is Fire Segment Director – The Americas for Sherwin-Williams Protective & Marine Coatings, where he leads the fire protection segment business in North America and Latin America. He has worked in the protective coatings and corrosion solutions industry for over 20 years and has extensive global experience in petrochemical and commercial fireproofing, including working with contractors on high-value fireproofing projects. He is a member of NACE International and holds Coating Inspector Program – Level 1 certification from the organization. He is also a member of the National Fire Protection Association (NFPA) and the Brazilian Association for Passive Fire Protection (ABPP). Troy has a bachelor’s degree from Fort Lewis College. He can be reached at

George Guanci, Project Development Manager
Sherwin-Williams, Protective & Marine

George Guanci, Project Development Manager, Sherwin-Williams Protective & Marine Coatings George Guanci, Project Development Manager for Sherwin Williams, is responsible for developing opportunities for the FIRETEX® commercial fireproofing product line in North America. He has over 35 years’ experience in the construction industry, most of which by serving the fire protection industry. George has extensive experience in petrochemical and commercial fireproofing, as well as UL listings and requirements, international fireproofing standards and fireproofing specification development. He is a member of the Construction Specifications Institute (CSI), NACE International and the National Fire Protection Association (NFPA). George has a bachelor’s degree from Merrimack College and a master’s from Northeastern University. He can be reached at

Tagged categories: Coating Application; Coating/Film Thickness; Coating/Film Thickness; Fire; Fireproofing; North America; PaintSquare; Sherwin-Williams

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