[{"data":1,"prerenderedAt":321},["ShallowReactive",2],{"ratgeber-en-brandschutz-stahlkonstruktionen":3},{"id":4,"title":5,"body":6,"cta":267,"description":256,"extension":275,"faq":276,"hero":298,"image":307,"locale":308,"meta":309,"navigation":310,"order":311,"path":312,"seo":313,"slug":317,"stem":318,"summary":319,"__hash__":320},"ratgeber\u002Fratgeber\u002Fen\u002Fbrandschutz-stahlkonstruktionen.md","Brandschutz Stahlkonstruktionen",{"type":7,"value":8,"toc":255},"minimark",[9,14,18,21,37,41,44,126,129,132,152,155,158,178,181,184,204,207,210,213,217,220,231,235,238],[10,11,13],"h2",{"id":12},"the-core-principle","The core principle",[15,16,17],"p",{},"Fire protection for a steel structure has one clearly defined goal: keep the steel temperature below a critical limit for a specified duration. Above that limit steel loses its load-bearing capacity, and the member fails.",[15,19,20],{},"The required duration is expressed as a fire-resistance class in minutes — R30, R60, R90, R120, R180 or R240. Which class applies in a given project follows from building type, use, and the relevant building code.",[22,23,24,28,31,34],"ul",{},[25,26,27],"li",{},"Goal: hold steel temperature below the critical limit",[25,29,30],{},"Classes: R30 \u002F R60 \u002F R90 \u002F R120 \u002F R180 \u002F R240 minutes",[25,32,33],{},"Driven by: building type, use, building code",[25,35,36],{},"Evidence: a tested system with a valid approval",[10,38,40],{"id":39},"the-four-systems-at-a-glance","The four systems at a glance",[15,42,43],{},"Four systems have established themselves for protecting load-bearing steel members. Each has its own strengths — there is no single “right” system, only the one that best matches geometry, aesthetic demands and the site conditions.",[45,46,47,66],"table",{},[48,49,50],"thead",{},[51,52,53,57,60,63],"tr",{},[54,55,56],"th",{},"System",[54,58,59],{},"Material",[54,61,62],{},"Key trait",[54,64,65],{},"Appearance",[67,68,69,84,98,112],"tbody",{},[51,70,71,75,78,81],{},[72,73,74],"td",{},"Fire protective boards",[72,76,77],{},"Calcium silicate or calcium sulphate boards, fibre-reinforced",[72,79,80],{},"Factory-made, fast to install",[72,82,83],{},"Closed cladding",[51,85,86,89,92,95],{},[72,87,88],{},"Intumescent coatings",[72,90,91],{},"Reactive coating",[72,93,94],{},"Expands to ~50× in a fire",[72,96,97],{},"Steel geometry stays visible",[51,99,100,103,106,109],{},[72,101,102],{},"Fire protective sprays",[72,104,105],{},"Cement\u002Fgypsum binders with fillers and fibres",[72,107,108],{},"Adapts to complex geometry",[72,110,111],{},"Plaster-like, form-following",[51,113,114,117,120,123],{},[72,115,116],{},"Membrane systems",[72,118,119],{},"Surface-based fire protection",[72,121,122],{},"For complex ceilings and composite structures",[72,124,125],{},"Suspended or laid-in surfaces",[10,127,74],{"id":128},"fire-protective-boards",[15,130,131],{},"Fibre-reinforced calcium-silicate or calcium-sulphate boards are produced in the factory under controlled conditions. That delivers tight tolerances and consistent quality — something that is not easily reproduced on a construction site.",[22,133,134,137,140,143,146,149],{},[25,135,136],{},"Single-layer cladding is sufficient for most applications",[25,138,139],{},"Direct installation without metal rails or complex supporting systems",[25,141,142],{},"Minimal drying times — no waiting for the next trade",[25,144,145],{},"Easier quality inspection because installation is straightforward",[25,147,148],{},"Lower weight and transport volume",[25,150,151],{},"Cut, screw and staple — year-round, with no temperature or humidity limits",[10,153,88],{"id":154},"intumescent-coatings",[15,156,157],{},"Intumescent coatings are applied like paint and remain practically invisible under normal conditions. When exposed to heat they react chemically, expand to roughly 50× their original volume and form an insulating carbon foam that keeps the steel temperature under control.",[22,159,160,163,166,169,172,175],{},[25,161,162],{},"Steel geometry stays visible — ideal where architecture shows the steel",[25,164,165],{},"Customisable in colour and finish",[25,167,168],{},"Works even on complex members and connection nodes",[25,170,171],{},"Application only under controlled conditions (temperature, humidity, substrate)",[25,173,174],{},"Multiple coats with proper drying time between them",[25,176,177],{},"Expansion space must stay free — no covering with rigid materials",[10,179,102],{"id":180},"fire-protective-sprays",[15,182,183],{},"Sprays are powder systems of cement- or gypsum-based binders with fillers and fibres. They are mixed on site and applied by machine — which lets them adapt to almost any geometry.",[22,185,186,189,192,195,198,201],{},[25,187,188],{},"Highly adaptable to complex beams, columns and connection nodes",[25,190,191],{},"Acceptable as a plaster-like finish when executed properly",[25,193,194],{},"Covers critical connection points cleanly",[25,196,197],{},"Requires on-site mixing equipment and masking of surrounding elements",[25,199,200],{},"Controlled drying conditions required",[25,202,203],{},"Extensive thickness verification for handover — every position must hit the minimum thickness",[10,205,116],{"id":206},"membrane-systems",[15,208,209],{},"Membrane systems take an alternative approach: they form a continuous protective surface and are particularly useful for complex ceiling geometries or composite (steel-concrete) structures — where cladding each profile individually would be uneconomic or geometrically impractical.",[15,211,212],{},"Instead of wrapping every steel member, the protection is suspended as a plane beneath — a clean solution in ceilings.",[10,214,216],{"id":215},"european-test-standards","European test standards",[15,218,219],{},"The performance of a fire-protection system for steel structures is demonstrated against harmonised European standards in a fire test. Three central references:",[22,221,222,225,228],{},[25,223,224],{},"applicable proof of usability — testing of membrane and ceiling protection systems",[25,226,227],{},"applicable proof of usability — testing of vertical fire-protection systems for load-bearing members",[25,229,230],{},"applicable proof of usability — fire resistance of load-bearing elements: floors and roofs",[10,232,234],{"id":233},"which-system-when","Which system when?",[15,236,237],{},"The choice is rarely free — it follows three drivers: the required fire-resistance class, architectural aesthetic demands and the site conditions. A handful of rules of thumb for an initial read:",[22,239,240,243,246,249,252],{},[25,241,242],{},"Want visible steel? → intumescent coating",[25,244,245],{},"Complex, cluttered geometry? → spray or coating",[25,247,248],{},"Fast, weather-independent installation required? → boards",[25,250,251],{},"Large ceiling areas with many individual profiles? → consider membrane",[25,253,254],{},"High fire-resistance class (R120 \u002F R180 \u002F R240)? → dimension thickness and system together",{"title":256,"searchDepth":257,"depth":257,"links":258},"",2,[259,260,261,262,263,264,265,266],{"id":12,"depth":257,"text":13},{"id":39,"depth":257,"text":40},{"id":128,"depth":257,"text":74},{"id":154,"depth":257,"text":88},{"id":180,"depth":257,"text":102},{"id":206,"depth":257,"text":116},{"id":215,"depth":257,"text":216},{"id":233,"depth":257,"text":234},{"kicker":268,"heading":269,"lead":270,"primary_label":271,"primary_to":272,"secondary_label":273,"secondary_to":274},"↳ Consultation","Planning fire protection for your steel structure?","We advise from system selection to execution — boards, intumescent coatings, sprays and membrane systems from a single source.","Request consultation","\u002Fkontakt\u002Fangebotsanfrage","View claddings","\u002Fleistungen\u002Fverkleidungen","md",{"kicker":277,"heading":278,"items":279},"↳ FAQ","Frequently asked questions on steel-structure fire protection.",[280,283,286,289,292,295],{"q":281,"a":282},"Why does steel need fire protection — it does not burn?","Steel does not burn, but it rapidly loses load-bearing capacity under heat. Without protection, a steel member can fail within minutes in a fire. An approved cladding or coating holds R30, R60, R90 or longer and gives time for evacuation, rescue and firefighting.",{"q":284,"a":285},"What do R30, R60, R90 mean for steel structures?","R denotes load-bearing capacity under fire load; the number is the minimum protection in minutes. So R90 means 90 minutes of load-bearing capacity in the standard fire. Which class applies is determined by building type, use and the relevant building code.",{"q":287,"a":288},"Board or coating — which is better?","Neither is better in absolute terms. Boards install fast, are weather-independent and easy to inspect. Coatings keep the steel visible and suit complex geometries. The decision follows aesthetic demands, access conditions and the site schedule.",{"q":290,"a":291},"Can intumescent coatings be over-painted later?","Only with a topcoat approved by the manufacturer that does not impede expansion. Rigid claddings, wallpaper or thick paint layers can defeat the protection — every additional layer must be system-compatible.",{"q":293,"a":294},"Which test standards apply to steel-structure fire protection in Europe?","The central references are applicable proof of usability (membrane and ceiling systems), applicable proof of usability (vertical protection systems) and applicable proof of usability (load-bearing floors and roofs). Only systems with a valid test and approval may be used.",{"q":296,"a":297},"Can I install steel fire protection myself?","No. All four systems require an approved specialist with manufacturer qualification. That is the only way the approval remains valid and the required fire-resistance class is demonstrable.",{"kicker":299,"title_pre":300,"title_em":301,"lead":302,"reading_time":303,"updated_label":304,"updated_value":305,"published_at":306,"updated_at":306},"↳ Guide · Steel construction","Fire protection for steel structures","which system fits?","Steel does not burn — but it loses load-bearing capacity rapidly under heat. The job of fire protection is to keep the steel temperature below a critical limit for a specified duration. Four systems do this — boards, intumescent coatings, sprays and membrane systems. What sets them apart, and when each makes sense.","9 minute read","Updated","April 2026","2026-04-20","\u002Fimages\u002Fratgeber-brandschutz-stahlkonstruktionen.webp","en",{},true,40,"\u002Fratgeber\u002Fen\u002Fbrandschutz-stahlkonstruktionen",{"title":314,"description":315,"keywords":316},"Fire Protection for Steel Structures — Systems Compared | Abels Brandschutz","Which fire-protection system for steel structures? Boards, intumescent coatings, sprays and membrane systems compared side by side — with properties, use cases and the European test standards.","fire protection steel structures, structural steel fire protection, intumescent coating steel, fire protective boards, fire protective spray, steel critical temperature, R30 R60 R90","brandschutz-stahlkonstruktionen","ratgeber\u002Fen\u002Fbrandschutz-stahlkonstruktionen",null,"VaI9utR3VLsnI5gU6XObqspp9ojRvTIHv11qynh84_Q",1779439330645]