{"id":2487,"date":"2026-01-31T03:21:05","date_gmt":"2026-01-31T03:21:05","guid":{"rendered":"https:\/\/huilicoating.com\/?p=2487"},"modified":"2026-02-07T08:28:46","modified_gmt":"2026-02-07T08:28:46","slug":"fireproof-coating-thickness-guide-steel-structures","status":"publish","type":"post","link":"https:\/\/huilicoating.com\/ru\/fireproof-coating-thickness-guide-steel-structures\/","title":{"rendered":"\u0420\u0443\u043a\u043e\u0432\u043e\u0434\u0441\u0442\u0432\u043e \u043f\u043e \u0442\u043e\u043b\u0449\u0438\u043d\u0435 \u043e\u0433\u043d\u0435\u0443\u043f\u043e\u0440\u043d\u044b\u0445 \u043f\u043e\u043a\u0440\u044b\u0442\u0438\u0439 \u0434\u043b\u044f \u0441\u0442\u0430\u043b\u044c\u043d\u044b\u0445 \u043a\u043e\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0438\u0439"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"2487\" class=\"elementor elementor-2487\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4eda8394 e-flex e-con-boxed e-con e-parent\" data-id=\"4eda8394\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5ce47a12 elementor-widget elementor-widget-text-editor\" data-id=\"5ce47a12\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Fireproof coating thickness is not a single number for \u201c60\/90\/120 minutes.\u201d The required DFT depends mainly on\u00a0<strong>fire rating time<\/strong>, the\u00a0<strong>steel section factor (Hp\/A)<\/strong>, and the\u00a0<strong>tested\/certified system<\/strong>\u2014manufacturers use loading tables or calculation tools to determine the correct thickness for each member.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-581d39c2 elementor-widget elementor-widget-image\" data-id=\"581d39c2\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"448\" src=\"https:\/\/huilicoating.com\/wp-content\/uploads\/2026\/01\/fireproof-coating-thickness-hpa-diagram.webp-1024x573.jpg\" class=\"attachment-large size-large wp-image-2493\" alt=\"Steel section factor Hp\/A determines required intumescent coating thickness\" srcset=\"https:\/\/huilicoating.com\/wp-content\/uploads\/2026\/01\/fireproof-coating-thickness-hpa-diagram.webp-1024x573.jpg 1024w, https:\/\/huilicoating.com\/wp-content\/uploads\/2026\/01\/fireproof-coating-thickness-hpa-diagram.webp-300x168.jpg 300w, https:\/\/huilicoating.com\/wp-content\/uploads\/2026\/01\/fireproof-coating-thickness-hpa-diagram.webp-768x430.jpg 768w, https:\/\/huilicoating.com\/wp-content\/uploads\/2026\/01\/fireproof-coating-thickness-hpa-diagram.webp-600x336.jpg 600w, https:\/\/huilicoating.com\/wp-content\/uploads\/2026\/01\/fireproof-coating-thickness-hpa-diagram.webp.jpg 1440w\" sizes=\"(max-width: 800px) 100vw, 800px\" title=\"\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-83e2ffb elementor-widget elementor-widget-text-editor\" data-id=\"83e2ffb\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2 id=\"what-is-fireproof-coating\" class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base visRefresh2026Fonts:text-lg first:mt-0 md:text-lg [hr+&amp;]:mt-4\">What Is Fireproof Coating?<\/h2><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Fireproof coatings are passive fire protection (PFP) materials applied to steel to slow heat transfer in a fire, helping the steel stay below critical temperature for a required time. Many steel fireproofing systems use intumescent coatings that expand and form an insulating char when heated.<span class=\"inline-flex\" aria-label=\"Testing and Certification of Steelwork Fire Protection - UL Solutions\" data-state=\"closed\">\u200b<\/span><\/p><h3 class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0\">Thin-film vs thick-film vs intumescent (practical distinction)<\/h3><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">In field terms, fireproofing is commonly grouped by build and application:<\/p><ul class=\"marker:text-quiet list-disc\"><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\"><strong>Thin-film intumescent:<\/strong>\u00a0often used where aesthetics matter; typical DFTs are commonly in the millimeter range (final by design).<span class=\"inline-flex\" aria-label=\"Let's Talk Measuring Intumescent (Fireproofing) Coating Thickness\" data-state=\"closed\">\u200b<\/span><\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\"><strong>Thick-film intumescent \/ higher-build systems:<\/strong>\u00a0used where higher build and durability demands exist; thickness may be higher than thin-film systems.<span class=\"inline-flex\" aria-label=\"Let's Talk Measuring Intumescent (Fireproofing) Coating Thickness\" data-state=\"closed\">\u200b<\/span><\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\"><strong>Other fireproofing approaches:<\/strong>\u00a0may be used depending on spec and exposure (project-dependent).<\/p><\/li><\/ul><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\"><strong>Unique value (what buyers forget):<\/strong>\u00a0\u201cFireproof paint\u201d is not one product category\u2014your standard (UL\/BS), exposure (interior\/exterior), and member geometry decide the correct system and thickness.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-184125e3 elementor-widget elementor-widget-text-editor\" data-id=\"184125e3\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2 id=\"why-fireproof-coating-thickness-matters\" class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base visRefresh2026Fonts:text-lg first:mt-0 md:text-lg [hr+&amp;]:mt-4\">Why Fireproof Coating Thickness Matters<\/h2><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Steel loses strength as temperature rises, so the job of fireproofing is to\u00a0<strong>limit the steel temperature rise<\/strong>\u00a0long enough to meet the required fire resistance time. Thickness is effectively your \u201cinsulation budget\u201d in the PFP design.<span class=\"inline-flex\" aria-label=\"Let's Talk Measuring Intumescent (Fireproofing) Coating Thickness\" data-state=\"closed\">\u200b<\/span><\/p><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">If thickness is too low:<\/p><ul class=\"marker:text-quiet list-disc\"><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Steel heats too fast \u2192 rating failure in fire test\/design case.<span class=\"inline-flex\" aria-label=\"Steel section factor in intumescent paint coating specification\" data-state=\"closed\">\u200b<\/span><\/p><\/li><\/ul><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">If thickness is too high (applied incorrectly):<\/p><ul class=\"marker:text-quiet list-disc\"><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Risk of cracking, sagging, poor curing, and adhesion issues (project-dependent), and may violate system approval conditions.<span class=\"inline-flex\" aria-label=\"Testing and Certification of Steelwork Fire Protection - UL Solutions\" data-state=\"closed\">\u200b<\/span><\/p><\/li><\/ul><h2 id=\"fireproof-coating-thickness-standards-what-the-spe\" class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base visRefresh2026Fonts:text-lg first:mt-0 md:text-lg [hr+&amp;]:mt-4\">Fireproof Coating Thickness Standards (what the spec is really asking)<\/h2><h3 class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0\">Common fire resistance times<\/h3><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Many projects specify a required duration such as\u00a0<strong>30 \/ 60 \/ 90 \/ 120 minutes<\/strong>, but the correct DFT still depends on Hp\/A and the certified system tables. Manufacturers provide loading tables to determine required DFT for each scenario.<\/p><h3 class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0\">Cellulosic vs hydrocarbon rapid-rise (critical)<\/h3><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">The required standard depends on the fire scenario:<\/p><ul class=\"marker:text-quiet list-disc\"><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\"><strong>Cellulosic fire exposure<\/strong>\u00a0is typical for building-type fire scenarios.<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\"><strong>Hydrocarbon rapid-rise<\/strong>\u00a0exposure is relevant for petrochemical\/oil &amp; gas; UL notes UL 1709 adoption for rapid-rise hydrocarbon fire scenarios and stresses that certification details must be followed to maintain rating.<span class=\"inline-flex\" aria-label=\"Testing and Certification of Steelwork Fire Protection - UL Solutions\" data-state=\"closed\">\u200b<\/span><\/p><\/li><\/ul><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\"><strong>Engineering takeaway:<\/strong>\u00a0If you specify the wrong scenario, you will select the wrong DFT table and may fail owner approval.<span class=\"inline-flex\" aria-label=\"Testing and Certification of Steelwork Fire Protection - UL Solutions\" data-state=\"closed\">\u200b<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-67fac97b elementor-widget elementor-widget-text-editor\" data-id=\"67fac97b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2 id=\"step-by-step-how-to-determine-required-thickness-d\" class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base visRefresh2026Fonts:text-lg first:mt-0 md:text-lg [hr+&amp;]:mt-4\">Step-by-step: How to determine required thickness (DFT)<\/h2><h3 class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0\">Step 1: Gather the steel member data (Hp\/A)<\/h3><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">The required DFT depends on\u00a0<strong>steel section factor<\/strong>, also called\u00a0<strong>Hp\/A<\/strong>\u00a0(and sometimes A\/V or ksm). Higher Hp\/A sections heat faster and typically require more fire protection thickness than lower Hp\/A sections for the same rating time.<span class=\"inline-flex\" aria-label=\"Steel section factor in intumescent paint coating specification\" data-state=\"closed\">\u200b<\/span><\/p><h3 class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0\">Step 2: Confirm fire rating time and standard<\/h3><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Provide:<\/p><ul class=\"marker:text-quiet list-disc\"><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Required time (30\/60\/90\/120 min)<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Fire scenario\/standard (cellulosic vs hydrocarbon rapid-rise)<\/p><\/li><\/ul><h3 class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0\">Step 3: Use manufacturer loading tables (do not guess)<\/h3><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Manufacturers provide DFT loading tables or calculation tools to determine the required DFT for each steel member and rating requirement.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-11b275a2 elementor-widget elementor-widget-text-editor\" data-id=\"11b275a2\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2 id=\"typical-fireproof-coating-thickness-ranges-guide-o\" class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base visRefresh2026Fonts:text-lg first:mt-0 md:text-lg [hr+&amp;]:mt-4\">Typical fireproof coating thickness ranges (guide only)<\/h2><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">These ranges help procurement set expectations, but final thickness is always confirmed by certified tables\/TDS.<\/p><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Based on industry discussion of lead practices for intumescent thickness measurement and typical system builds:<\/p><ul class=\"marker:text-quiet list-disc\"><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\"><strong>Thin film systems:<\/strong>\u00a0commonly around\u00a0<strong>2\u20138 mm<\/strong>\u00a0DFT (typical range cited; final by design).<span class=\"inline-flex\" aria-label=\"Let's Talk Measuring Intumescent (Fireproofing) Coating Thickness\" data-state=\"closed\">\u200b<\/span><\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\"><strong>Thick film systems:<\/strong>\u00a0commonly around\u00a0<strong>4\u201313 mm<\/strong>\u00a0DFT (typical range cited; final by design).<span class=\"inline-flex\" aria-label=\"Let's Talk Measuring Intumescent (Fireproofing) Coating Thickness\" data-state=\"closed\">\u200b<\/span><\/p><\/li><\/ul><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\"><strong>Important:<\/strong>\u00a0Your project could be outside these ranges depending on Hp\/A, rating time, and standard.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5fa82912 elementor-widget elementor-widget-text-editor\" data-id=\"5fa82912\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2 id=\"fireproof-coating-system-for-steel-structures-dont\" class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base visRefresh2026Fonts:text-lg first:mt-0 md:text-lg [hr+&amp;]:mt-4\">Fireproof coating system for steel structures (don\u2019t ignore the primer)<\/h2><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">A compliant fireproofing package is usually a\u00a0<strong>system<\/strong>, not just the fireproof layer. UL stresses that deviations from certification requirements and design details can void the fire rating and certification.<span class=\"inline-flex\" aria-label=\"Testing and Certification of Steelwork Fire Protection - UL Solutions\" data-state=\"closed\">\u200b<\/span><\/p><h2 class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0\">Key system components<\/h2><ul class=\"marker:text-quiet list-disc\"><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Primer (anti-corrosion; compatibility must be confirmed)<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Fireproof layer (intumescent \/ specified system)<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Topcoat\/sealer (when required for durability; project-dependent)<\/p><\/li><\/ul><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\"><br \/>For project inquiries and system options, start here:<br \/>Anchor: <span style=\"color: #3366ff;\"><a style=\"color: #3366ff;\" href=\"https:\/\/huilicoating.com\/fire-resistant-coating-series\/\">[Fire-Resistant Coating Series] -&gt;<\/a><\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d4441d4 elementor-widget elementor-widget-text-editor\" data-id=\"d4441d4\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2 id=\"qualityinspection-checklist-wftdft-measurement\" class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base visRefresh2026Fonts:text-lg first:mt-0 md:text-lg [hr+&amp;]:mt-4\">Quality\/inspection checklist (WFT\/DFT measurement)<\/h2><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Thickness control is a quality-critical step, and you should measure both during and after application.<\/p><h3 class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0\">During application: Wet Film Thickness (WFT)<\/h3><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Installers often measure\u00a0<strong>WFT<\/strong>\u00a0and then convert to expected DFT using the manufacturer\u2019s guidance (since coatings shrink as they cure).<span class=\"inline-flex\" aria-label=\"Intumescent Coating Thickness: Why It Matters and How It's Measured\" data-state=\"closed\">\u200b<\/span><\/p><h3 class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0\">After cure: Dry Film Thickness (DFT)<\/h3><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">DFT measurement should be done using appropriate thickness gauges; resources describing intumescent thickness measurement note gauges designed for thick coatings and discuss accepted measurement methods.<span class=\"inline-flex\" aria-label=\"How to Measure Intumescent Fire Resistive Coating Thickness\" data-state=\"closed\">\u200b<\/span><\/p><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\"><strong>What to record<\/strong><\/p><ul class=\"marker:text-quiet list-disc\"><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Member ID\/location and readings<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Minimum\/maximum DFT acceptance ranges per spec<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Any areas where DFT cannot be measured and how verified (project-dependent)<\/p><\/li><\/ul><div class=\"group relative\">\u00a0<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2fc540e4 elementor-widget elementor-widget-text-editor\" data-id=\"2fc540e4\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2 id=\"common-failures--troubleshooting\" class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base visRefresh2026Fonts:text-lg first:mt-0 md:text-lg [hr+&amp;]:mt-4\">Common failures + troubleshooting<\/h2><ul class=\"marker:text-quiet list-disc\"><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\"><strong>Wrong thickness because Hp\/A was missing:<\/strong>\u00a0\u201cone thickness for all beams\u201d is a common RFQ error; Hp\/A drives thickness.<span class=\"inline-flex\" aria-label=\"Steel section factor in intumescent paint coating specification\" data-state=\"closed\">\u200b<\/span><\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\"><strong>Incorrect standard selection:<\/strong>\u00a0hydrocarbon rapid-rise vs cellulosic confusion; must match the owner\u2019s fire scenario.<span class=\"inline-flex\" aria-label=\"Testing and Certification of Steelwork Fire Protection - UL Solutions\" data-state=\"closed\">\u200b<\/span><\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\"><strong>Poor adhesion \/ delamination:<\/strong>\u00a0often linked to primer compatibility or surface contamination; use approved systems and follow certification details.<span class=\"inline-flex\" aria-label=\"Testing and Certification of Steelwork Fire Protection - UL Solutions\" data-state=\"closed\">\u200b<\/span><\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\"><strong>Cracking\/sagging:<\/strong>\u00a0often linked to overbuild per coat or improper cure; apply in controlled passes (project-dependent).<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-64549703 elementor-widget elementor-widget-text-editor\" data-id=\"64549703\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2 id=\"rfq-checklist-to-get-a-correct-thickness-recommend\" class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base visRefresh2026Fonts:text-lg first:mt-0 md:text-lg [hr+&amp;]:mt-4\">RFQ Checklist (to get a correct thickness recommendation)<\/h2><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">To receive an accurate thickness calculation and quote, provide:<\/p><ul class=\"marker:text-quiet list-disc\"><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Fire rating time: 30 \/ 60 \/ 90 \/ 120 minutes<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Fire scenario\/standard required: cellulosic or hydrocarbon rapid-rise (e.g., UL 1709 where applicable)<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Steel schedule: beam\/column sizes and quantities<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Hp\/A (section factor) if available, or drawings to calculate it<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Exposure: interior dry \/ semi-exposed \/ exterior; humidity and UV<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Existing primer\/system (if maintenance): coating type, age, condition<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Application method: shop or site; access constraints; shutdown window<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Documents requested: TDS\/SDS, certified DFT tables\/loading chart, application &amp; inspection procedure<\/p><\/li><\/ul><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">If you also need corrosion protection under the fireproofing, share your primer requirement and steel exposure here:<br \/>Anchor:<a href=\"https:\/\/huilicoating.com\/areas-of-application\/steel-structure-coating-industrial-anti-corrosion-solutions\/\"><span style=\"color: #3366ff;\"> [Steel Structure Coating Solutions] -&gt;\u00a0<\/span><\/a><\/p><p>\u00a0<\/p><p>UL guidance on steel fire protection <span style=\"color: #3366ff;\"><a style=\"color: #3366ff;\" href=\"https:\/\/www.ul.com\/resources\/testing-and-certification-steelwork-fire-protection\" rel=\"nofollow noopener\" target=\"_blank\">testing\/certification context<\/a><\/span><\/p><h2 id=\"cta-get-a-fireproof-coating-thickness-recommendati\" class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base visRefresh2026Fonts:text-lg first:mt-0 md:text-lg [hr+&amp;]:mt-4\">CTA: Get a fireproof coating thickness recommendation<\/h2><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Send your steel schedule, Hp\/A (or section sizes), required rating time, and the fire scenario (cellulosic vs hydrocarbon rapid-rise). HUILI will provide a project-based fireproof coating thickness recommendation with TDS\/SDS and system guidance, aligned with certified DFT tables and approval requirements. UL guidance stresses that certification details must be followed to maintain the rating, so project inputs are essential.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-568af985 e-con-full e-flex e-con e-parent\" data-id=\"568af985\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-74e4d191 e-con-full e-flex e-con e-child\" data-id=\"74e4d191\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-77e2eb7b elementor-widget elementor-widget-heading\" data-id=\"77e2eb7b\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Contact Us<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3d06ffe0 elementor-widget elementor-widget-heading\" data-id=\"3d06ffe0\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">We would love to speak with you.<br>Feel free to reach out using the below details.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-41897238 e-con-full e-flex e-con e-child\" data-id=\"41897238\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-58a99ee5 elementor-button-align-start elementor-tablet-button-align-center elementor-widget elementor-widget-form\" data-id=\"58a99ee5\" data-element_type=\"widget\" data-settings=\"{&quot;step_next_label&quot;:&quot;Next&quot;,&quot;step_previous_label&quot;:&quot;Previous&quot;,&quot;button_width&quot;:&quot;100&quot;,&quot;step_type&quot;:&quot;number_text&quot;,&quot;step_icon_shape&quot;:&quot;circle&quot;}\" data-widget_type=\"form.default\">\n\t\t\t\t\t\t\t<form class=\"elementor-form\" method=\"post\" name=\"Contact Form\">\n\t\t\t<input type=\"hidden\" name=\"post_id\" value=\"2487\"\/>\n\t\t\t<input type=\"hidden\" name=\"form_id\" value=\"58a99ee5\"\/>\n\t\t\t<input type=\"hidden\" name=\"referer_title\" value=\"\" \/>\n\n\t\t\t\n\t\t\t<div class=\"elementor-form-fields-wrapper elementor-labels-\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-text elementor-field-group elementor-column elementor-field-group-name elementor-col-50 elementor-field-required\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-name\" class=\"elementor-field-label elementor-screen-only\">\n\t\t\t\t\t\t\t\tYour 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elementor-column elementor-field-group-field_6c180a9 elementor-col-50 elementor-field-required\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-field_6c180a9\" class=\"elementor-field-label elementor-screen-only\">\n\t\t\t\t\t\t\t\tPhone Number\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t<input size=\"1\" type=\"tel\" name=\"form_fields[field_6c180a9]\" id=\"form-field-field_6c180a9\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"Phone Number*\" required=\"required\" pattern=\"[0-9()#&amp;+*-=.]+\" title=\"Only numbers and phone characters (#, -, *, etc) are accepted.\">\n\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-email elementor-field-group elementor-column elementor-field-group-email elementor-col-50 elementor-field-required\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-email\" class=\"elementor-field-label elementor-screen-only\">\n\t\t\t\t\t\t\t\tEmail\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"email\" name=\"form_fields[email]\" id=\"form-field-email\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"Email*\" required=\"required\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-textarea elementor-field-group elementor-column elementor-field-group-message elementor-col-100\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-message\" class=\"elementor-field-label elementor-screen-only\">\n\t\t\t\t\t\t\t\tMessage\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t<textarea class=\"elementor-field-textual elementor-field  elementor-size-sm\" name=\"form_fields[message]\" id=\"form-field-message\" rows=\"4\" placeholder=\"Message\"><\/textarea>\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-group elementor-column elementor-field-type-submit elementor-col-100 e-form__buttons\">\n\t\t\t\t\t<button class=\"elementor-button elementor-size-sm\" type=\"submit\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Send<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/button>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/form>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Fireproof coating thickness is not a single number for \u201c60\/90\/120 minutes.\u201d The required DFT depends mainly on\u00a0fire rating time, the\u00a0steel section factor (Hp\/A), and the\u00a0tested\/certified system\u2014manufacturers use loading tables or calculation tools to determine the correct thickness for each member. What Is Fireproof Coating? Fireproof coatings are passive fire protection (PFP) materials applied to steel [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2493,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[99],"tags":[],"class_list":["post-2487","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-guides-inspection"],"acf":[],"_links":{"self":[{"href":"https:\/\/huilicoating.com\/ru\/wp-json\/wp\/v2\/posts\/2487","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/huilicoating.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/huilicoating.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/huilicoating.com\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/huilicoating.com\/ru\/wp-json\/wp\/v2\/comments?post=2487"}],"version-history":[{"count":0,"href":"https:\/\/huilicoating.com\/ru\/wp-json\/wp\/v2\/posts\/2487\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/huilicoating.com\/ru\/wp-json\/wp\/v2\/media\/2493"}],"wp:attachment":[{"href":"https:\/\/huilicoating.com\/ru\/wp-json\/wp\/v2\/media?parent=2487"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/huilicoating.com\/ru\/wp-json\/wp\/v2\/categories?post=2487"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/huilicoating.com\/ru\/wp-json\/wp\/v2\/tags?post=2487"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}