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Mind the Gap Between FMGlobal and Building CodesInternational Association ofCold Storage ConstructionM.R.MR Mannex,Mannex PEChief Engineering Technical SpecialistFM Global4 NovN 2011Las Vegas NV
Overview Who is FM GlobalWhy different from codes?Fire hazardsConstruction - wind, collapseTestingProject coordinationFM Approvals
Who is FM Global MMutuall iinsurance company – ownedd bybour clients In business 176 years PurposeP rpose – Client valueal e conservationconser ation bybminimizing the risk of property damageand business interruption.
Organization– ResearchRh – theh bbasisi off our standardsd d– Approvals – end use components andsystems as they are installed– Testingg – feeds Research and Approvalspp– Information delivery: Field engineeringgg FM Global Data Sheets Approval publications
Our Role We are:– a consultantl– providing advice– in a partnership with our (and your) client– using flexible guidelines We are not:– an Authority Having Jurisdiction (AHJ)– tellingg the client what theyy must do– bound to prescriptive standards or codes.
Why are there differences in FMGlobal standards and Model Codes? FM Global ggoal is to gget the client back inbusiness with minimal delay– The resulting damage threshold is often small. The Code’s goal is mainly personnel safety:– Get all personnel out of the building safely.– Business continuity not a focus.– The resulting damage threshold can be large.large
NFPA and Model Building Codes Purpose – Main objective is life safety. Someproperty protectionprotection, and minor societal impact.impact Basis – Mostly, second or third hand testing (95%from FM Global)Global), sometimes opinions.opinions Method – Rhetorical consensus: corporations,contractors fire equipment manufacturers,contractors,manufacturers firedepartments, and anyone else with a vested interest Implementation – prescriptively enforced by AHJswho are sometimes not specifically trained for this.
FM Global Engineering model PPurpose – ClientCli t valuel conservation.ti FocusFonminimizing property damage. Basis – First hand research and testing Method – Research and standards work together quickly Implementation –– Advice at each site is customized on a scenario basis tothe local conditions– Sometimes we allow less than our standards, or ask formore – local engineers use sound engineering judgmentbased on FM Global’sGlobal s knowledgeknowledge.
Performance BasedImplementation AdAdvicei at eachh sitei isi customizedi d on ascenario basis to the local conditions Sometimes we allow less than ourstandards or ask for more – itstandards,it’ss the localengineer’s call. This can look like inconsistency – it’snot, it’s tailoring to the situation.
Can we compare the NFPAand FM Global standards? TToo many optionsito compare themhcomprehensively with real equivalence. The standards differ in general approach andterminology. Example: storage sprinklers– Encapsulation – NFPA yes, FM Global no.– ‘Storage Sprinkler’ – NFPA no, FM Global yes.– Adjustments and Interpolation – NFPA yes, FM Global no. e.g.g - storageg height,g , aisle width,, steel column pprotection
Codes and NFPA standardsassociated with refrigerated storageThe following is not intended to be acomplete research of the codes. That’snot FM Global’s job, that’s the job of aconsulting engineer or architect. This isonly an example and I’m sure I missedsomething. The point is, one or theother is not more important or better,they are different for good reasons.
Standards for storage sprinkler systemsFM Global Data SheetNFPA standard 8-9,8 9 StorageStoff ClClass 11, 2,2 3,3 4 NFPA 1313, StandardSt d d ffor ththe 8-29,8 29 RefrigeratedR fid StorageS NFPA 13 22-00, Installation Guidelines for NFPA 13 2-81,2 81 Fire Protection System NFPA 2525, Inspection,and Plastic CommoditiesAutomatic SprinklersInspection, Testing andMaintenanceInstallation of Sprinkler SystemsTesting and Maintenance ofWater-Based Fire ProtectionSystems
Standards for refrigerated constructionFM Global Data SheetNFPA standard 1-57,1 57 PlasticsPl ti ini ConstructionC t ti NFPA 5000,5000 BuildingB ildi 1212-6161, Mechanical NFPA 11, FireFi CCodedRefrigerationConstruction and Safety Code(refers to ASHRAE 15)
Standards for exterior constructionFM Global Data SheetNFPA standard 1-57,1 57 PlasticsPl ti ini ConstructionC t ti NFPA 5000,5000 BuildingB ildi 11-2929, Roof Deck Securement NFPA 5000 FM ApprovalppGuide (No analogue)and Above-Deck RoofComponentsConstruction and Safety Code\
IMP acceptance test differences Model Codes– ASTM E-84E 84 – “SteinerSteiner Tunnel testtest” – not applicable tothermoplastics or vertical orientations– NFPA 286 – “small room test” – 8 x 12 x 8 high ft. (similarto UBC 26-3, ISO 9705, UL 1715, FM Global Small RoomTest) FM Global – full scale test and small room test– FM Global Approval Standard 4880, Class 1 Fire Rating ofInsulated Wall or Wall and Roof/Ceilingfg Panels, InteriorFinish Materials or Coatings, and Exterior Wall Systems.– FM Global Approval Standard 4881 Class 1 Exterior WallSystems (includes the fire performance from 4880)– Performed at the FM Global Research Campus
Testing done at our Research CampusNatural Hazards Lab 70,000 ft2 EQ LabMultimediaCenterFire Technology LabElectrical LabHydraulics LabMaterials LabLarge Burn Lab Improvements Two Movable Ceilings Humidity Control 2010 FM Global. All
FM Approval scope Approval includes all hazards to which thefinal installation may be exposed For interior panels, meet fire hazardsrequirementsit If exterior walls or roof included, must alsomeet wind, hail, wind driven debris, exteriorfire exposure, and collapse loads.
FMRC Corner Fire Test50 ft((15.2 m))37.9 ft(11.5 m)25 ft(7.6m)Wooden pallets
FM Approval GuideSearchable freeweb basedweb-baseddatabase of 50,000components,systems andsystems,services, highestpropertyprotectionstandards. Procedure –proposal, testing,QC, contract, ongoingi QC
Roof NavSearchable freeweb-baseddatabase ofroofingcomponents andsystems.
Sprinkler design Fire protection design – more demanding ofeither the construction or occupancy Construction - Non-FM Approvedppmetalsandwich panel [DS 1-57] Occupancy – storage [DS 8-9]
Combustible sandwich panel fire hazards Material - Two basic kinds: Thermoplastic (e.g.,polystyrene), and thermoset (e.g., polyurethane,polyisocyanurate).– Thermoplastic – higher fire hazard. When heated, melts andforms an ignitable liquid pool, fire. Melts 400F. Sprinklersalone cannot control a fire involving exposed expanded orextruded polystyrene.– Thermoset – When heated, chars and does not melt.Ignition 600-700F. Amount of fuel – thickness and density Facing – material and securement
Combustible contents (storage ) fire hazards FM Global Data Sheet 8-9, Storage of Class 1, 2, 3, 4and Plastic Commodities––––Commodity – what is storedArrangement – how is it stored (e.g., racks, solid pile)Ceiling heightSprinkler type (temp, sensitivity, orientation, orifice size) Why not storage height? FM Global – accounts for a storage heights that can fit NFPA – protection may restrict storage heights
Sprinkler system types FM Global - Type of sprinkler system driven bytemperature [DS 88-29].29]. Above 2020 FF – dry sprinklersystem. Below 20 F – FM Approved RefrigeratedArea Pre-action System NFPA 13 – Dry systems below 40 F. Special dry airsupplies and pre-action detection required below32 F.
Sprinkler system hot topics FM Global guidelines for some protection systems orsprinklers may not match the UnderwriterLaboratories guidelines. Ceilingg onlyy ((ESFR)) wet systemsyw/ anti-freeze –allowable above 25 F. [FM Global DS 2-0, 2.4.7.1] New FM Approved dry systems which eliminate inrack sprinklers for ceilings up to 45 ft. Ice plugs - air supply and inspection
Roof and exterior wall systems FM Global guidelines for wind forces are higher thanmany codes. Snow loading on roofs108 Standard Test Exterior fire resistance [ASTM E 108,Methods for Fire Tests of Roof Coverings] Wind driven debris in high risk windstorm areas (hurricanes).
Having trouble keeping track of all this? What should a design professional, contractor orsupplier do? Is the project insured by FM Global? Ask buildingowner or call the local FM Global office(www.fmglobal.com) Not a FM Global client – use FM Approvedcomponents and standards at your own option, butFM Global cannot comment on any aspect of theproject.j
Project coordination services Goal – avoid surprises to our common client FM Global local office will pprovide consultinggregarding FM Approved component selection andrefrigerated area construction and design, fireprotection design. Review plans and make site construction periodvisits.ii Key - Get us involved as early as possible, nolater than schematics. No design professional canmake recommendations which will not affect scope,schedule,h d l or cost if theyh are broughtbh ini too latel neither can FM Global.
Resources www.fmglobal.com – Includes link to: FM Approval standards – open source FM Approvals – for obtaining product Approval Data Sheets – free standards www.roofnav.comf– freef Exterior roofing www approvalguide com – free www.approvalguide.com Sandwich panels Sprinkler systems
Questions?
FM Global Data Sheets Approval publications. Our RoleOur Role We are: – a consultant – providing advice – in a partnership with our (and your) client – using flexible guidelinesusing flexible guidelines We are not: – an Authority Having Jurisdiction (AHJ) – tellinggy the client what they must do – bound to prescriptive standards or codes. Why are there differences .File Size: 515KBPage Count: 32
