NZBC C PROTECTION FROM FIRE - AMENDMENTS DECEMBER 2013

DOWNLOAD THIS ARTICLE AS A PDF FILE

The following list of changes to NZBC C is a guide only, the latest Acceptable Solutions, Verification Method and Commentary Documents should be referenced and used.

View the MBIE short list of key changes, for;

Acceptable Solutions:

http://www.dbh.govt.nz/UserFiles/File/Publications/Building/info-sheets/c-as1-as7-information-sheet-2013-12.pdf

Verification Method 2:

http://www.dbh.govt.nz/UserFiles/File/Publications/Building/info-sheets/c-vm2-information-sheet-2013-12.pdf


Acceptable Solutions - Changes Generally

Changes to quoted Standards

  • NZS 4541 Automatic fire sprinkler systems, has changed from the 2007 version to the 2013 version
  • AS/NZS 5601.1: 2010, Gas Installation - General Installation, has replaced NZS 5261: 2003 (note: 2010 is not the latest version of 5601)
  • AS/NZS 60598.2.2:2001 now includes Amendment AA

Definitions Added

  • Multi Unit Dwellings, added to AS1
  • Damper Blade, added to AS2 to AS6
  • Penetration, not new but amended to expand the range of building elements that can be considered as penetrations (AS1-AS6)

Alterations and Change of use  (Clause 1.3, AS1 - AS6)

  • Alterations now do not have to comply with Fire fighting section
  • Change of use now does not have to comply with the Fire fighting or prevention sections
  • If they can't be done using the Acceptable Solutions, you no longer have to use NZBC C/VM2, you can agree with the BCA/TA, what level of assessment is required

Gas-burning appliances  (clause 7.2, AS1 - AS6)

  • Uses a new Standard AS/NZS 5601.1
  • For seismic restraint now uses the solution of B1/VM1

Smoke Control Doors  (Clause C6.1.2, AS1 - AS6)

  • Minimum leaf thickness reduced from 45mm to 35mm
  • Clarification that, minimum 30mm thickness in relation to frames refers to the jambs

Same risk group on different floors  (clause 2.2.8, AS2 - AS6)

  • Fire Safety Systems no longer related to height, but to the firecell having the most onerous requirements (AS2-AS6)

FRR Values for structural elements  (clause 2.3.1, AS2 - AS6)

  • Under certain conditions, structural elements in a single story building need not be fire rated

Insulation in FRR elements  (clause 2.3.13, AS2, AS4 - AS5)

  • FRR Insulation rating not required, range expanded to include, stopping, dampers, fire glazing, subject to conditions (Also 4.4.5 for fire stops - AS2-AS6) (Also 4.16.11 for lift doors - AS2, AS4-AS6)

Width of accessible stairs & accessible routes  (clause 3.3.2, b) & c), AS2, AS4-AS6)

  • The term 'accessible stair' has been added alongside 'accessible route'
  • For a combined escape route which is also an accessible route or accessible stair, the minimum width for vertical travel has been reduced from 1200mm to 1100mm

Lift shaft pressurisation  (clause 3.10.4, AS2,AS4,AS5)

  • Lift shaft pressurisation has been added as an acceptable means of avoiding, isolating the lifts or using special lift doors

Roof and ceiling space options  (clause 4.15.6, AS2 & AS4)

  • For unsprinklered firecell roof/ceiling spaces, smoke detection has been added as an option to subdividing the space with fire separations

Fire dampers  (clause 4.16.12, AS2 - AS6)

  • Damper Blades do not now require a FRR insulation rating, if combustible materials are over 300mm away
  • Damper Blades do not now require a FRR structural adequacy rating

Surface Finishes - Table 4.1  (AS2-AS6)

  • The Comment box has had added to it:
  • 1. That a particular note should be made of the requirements for ducts
    2.  And there are also instances of certain surface finishes being assigned Group numbers without evaluation eg films and paint coatings

Surface Finishes - Appendix A - C/VM2  (Table 4.1 Comment,  AS2-AS6)

  • Note; the Table 4.1 Comment has always linked the Acceptable Solutions to C/VM2 Appendix A, for the method of assigning a Group Number etc.C/VM2 Appendix A has changed, the changes are as follows:
  • 1.  A1.1.b), Foil faced combustible materials, now allows for those materials forming part of rigid or flexible ductwork to be assessed differently
    2.  A1.3. Step 3 - HRR indices - changes to both formulas
    3.  A1.4 - new group number clause for HVAC systems
    4.  A1.5 and table A1 - new clause and table - provides predetermined group numbers for coatings and films on certain substrates that do not require further explanation.So with some paints and stains on common linings, and some films on glass, you no longer have to have a manufacturer supplied Group Number.
    Note: Table A1 indicates that the predetermined group number applies to the coating or the substrate without the coating

Exceptions to surface finish requirements  (clause 4.17.6.a), AS2 - AS6) (clause 4.3.a), C/AS1)

  • Handrails and general decorative trim of any material (architraves, skirtings, window reveal etc) shall not now exceed 5% of the wall or ceiling area
  • Note; confusingly, this same clause is used under the title - Foamed Plastics - clause 4.3.d), in C/AS1, but the words "any material" are still in the clause

Intermediate floors  (clauses 4.13.5 & 4.13.6, AS4 - AS6)

  • Instead of just singular, multiple intermediate floors are now allowed subject to conditions


Particular Changes to Acceptable Solution C/AS1

Outbuildings added to scope  (clause 1.1.1, C/AS1)

  • Outbuilding (as described in NZBC A1.8.0) up to maximum floor area of 100m2 now included

Multi-unit dwellings - Figure 1.1  (C/AS1)

  • Separating floors now show FRR separations

Automatic fire sprinklers - Table 2.1  (C/AS1)

  • The standard used has changed from NZS 4541 to NZS 4515
  • Note; In some cases this will allow lesser requirements particularly for Types 6 & 7

Escape routes outbuildings  (clause 3.4, C/AS1)

  • Outbuilding escape routes may be any length

Travel distances - Table 3.2  (C/AS1)

  • A combined sprinkler system/smoke detection system is now defined by NZS 4515/NZS 4512

    Foamed Plastics etc  (now clause 4.3, was clause 4.2.2, C/AS1)

    Fire ratings  (clauses 5.1 & 5.3, C/AS1)

  • Wall fire ratings altered
  • Fire rating required due to lower roof on other property, added

Exterior surface finishes - Table 5.1  (C/AS1)

  • The old table appears to have a mistake in it, this new table seems to correct that, it now has no requirements for walls/cladding, greater than 1m from boundary

Allowing for Fire Service vehicles  (clause 6.1, C/AS1)

  • For some multi-unit dwellings, there is a new requirement to allow for Fire Appliances to access the site
  • Note; requirements can be quite extensive


Particular Changes to Acceptable Solution C/AS3


Fire safety systems  (clause 2.2.1 a), C/AS3)

  • Sprinkler supply requirements now less restrictive for occupancies less than 100 people

Group sleeping and suites FRR  (Figure 4.4 and clauses 4.6.5, C/AS3)

  • FRR requirements changed from 30 or 60 min FRR to life rating FRR


Particular Changes to Acceptable Solution C/AS4

Occupant density for risk group CA  (table 1.2, C/AS4)

  • Densities for airports added
  • Shop spaces and pedestrian circulation area increase to 3.5m2 from 3m2

Fire Safety Systems  (clause 2.2, C/AS4)

  • Large number of changes to: numbers of people, escape heights, safety system types, etc

Hold opens for fire and smoke doors  (clause 3.15.9, C/AS4)

  • Early childhood centres in multi-storey building (not ground) are now required to have these

Surface finish exceptions  (clause 4.17.6.j), C/AS4)

  • Roof light subject to conditions, added as exceptions


Particular Changes to Acceptable Solution C/AS5

Scope of storage building types extended  (clause 1.1.1 ca), C/AS5)

  • Storage heights of greater than 5m are now allowed under certain building parameters
  • Note: Figure 2: Capable of Storage, in the commentary document has also changed and gives a new range of options.

Fire safety systems  (clause 2.2.1, C/AS5)

  • For 100 to 1,000 people, or >4.0m but <25m escape height, the range of system types allowable has been increased

Open sided buildings - Figure 5.5  (C/AS5)

  • For open sided buildings over 40m2 the separation distances have increased from 1m to 3m

 

Particular Changes to Acceptable Solution C/AS6

Scope of storage building types reduced  (clause 1.1.1a), C/AS6)

  • Now excludes storage buildings that have been added to the scope of C/AS5
  • Note: Figure 2: Capable of Storage, in the commentary document, has also changed to show a wider range of options

Fire safety systems  (clause 2.2.1, C/AS6)

  • The requirement for a Type 18 hydrant system or hose run distances, has been added to larger buildings

 

Particular Changes to Acceptable Solution C/AS7

Scope of risk group VP reduced  (clause 1.1.1 & 1.1.2, C/AS7)

  • Car showrooms, mechanical workshops and single level boat shed are now excluded from the scope of C/AS7

Fire safety systems  (clause 2.2.1, C/AS7)

  • Requirements for Type 2 alarm system reduced slightly
  • Added - sprinkler systems required in risk group VP may not, in some circumstances, need to be through the whole building


Verification Method - C/VM2

Standards changes

  • NZS 4541: Automatic Fire Sprinkler Systems is now the 2013 version
  • AS/NZS 3837:1998 now includes Amendment 1.
  • New Standards are:
    • AS 4254: Ductwork for air-handling systems in buildings
    1. Part 1: 2012 - Flexible Duct
    2. Part 2: 2012 - Rigid Duct

Definition changes

  • Place of Safety, has occupancy density added

Design Scenario UT - Figure 1.1.c)  (C/VM2)

  • Requirement to Conduct ASET-RSET Analysis, has been added

Fire modelling rules for life safety design  (clause 2.2.1, C/VM2)

  • There has been a number of changes and additions related to doors
  • Volume of a spaces contents may not now be included in the space
  • Some CFD modelling requirements have been added
  • Some minor glazing changes included

Pre-flashover designs - Table 2.1  (C/VM2)

  • Changes to, Peak HRR/HRR/m2
  • Explanatory notes added

Design FLEDS - Table 2.2  (C/VM2)

  • Range of examples expanded

Fm factors - Table 2.3  (C/VM2)

  • Major changes to table

Pre-travel activity times - Table 2.3  (C/VM2)

  • Early childhood care added

Travel time  (clause 3.2.4, C/VM2)

  • Slight change to determining horizontal travel distance

Small ancillary spaces (clause 3.4.1, C/VM2)

  • New clause providing requirements and criteria for these spaces

Design Scenario SF  (clause 4.4, C/VM2)

  • Detection no longer is just "smoke detection", and now seems to only apply to sleeping spaces

Design Scenario HS  (Clause 4.5, C/VM2)

  • Average FLED beneath canopy changed
  • Added - new table 4.1 about heat release rates

Design Scenario VS  (clause 4.6, C/VM2)

  • Added - new table 4.2 about heat release rates

Design Scenario IS  (clause 4.7, C/VM2)

  • Scenario Descriptions - a) handrails and general decorative trim etc shall now not exceed 5% of wall or ceiling
  • Scenario Descriptions - g) new sub-clause excluding roof lights under certain conditions
  • Rigid or flexible ductwork under certain conditions can be assigned Group numbers 1 or 1s
  • Testing requirements for rigid or flexible ductwork added

Design Scenario FO  (clause 4.8, C/VM2)

  • Scenario Descriptions - conditions for when a canopy can be ignored, has been added
  • Intermediate floor can now be now multiple intermediate floors
  • Criteria for perforated floors and racking with open grate walkways etc, has been added

Design Scenario CF  (clause 4.9, C/VM2)

  • Scenario description - new exclusion from ASET analysis - d) rooms with no more than 4 occupants undergoing treatment
  • Note : the new comments box below this sub-clause d) adds in other ancillary rooms

Design Scenario RC  (clause 4.10.c), C/VM2)

  • Scenario description - the requirement "more than 20 people" added to those determined or undergoing treatment or care - children in early childhood centre also added
  • Note: new comment box attached to the above, extends treatment or care

Appendix A (normative)  (C/VM2)

  • A1.1.b), Foil faced combustible materials, now allows for those materials forming part of rigid or flexible ductwork to be assessed differently
  • A1.3. Step 3 - HRR indices - changes to both formulas
  • A1.4 - new group number clause for HVAC system
  • A1.5 and table A1 - new clause and table - predetermined group numbers for some coatings and films on certain substrates that do not require further explanation
  • Note: Table A1 indicates that the predetermined group number applies to the coating or the substrate without the coating


View the MBIE short list of key changes, for;

Acceptable Solutions:

http://www.dbh.govt.nz/UserFiles/File/Publications/Building/info-sheets/c-as1-as7-information-sheet-2013-12.pdf

Verification Method 2:

http://www.dbh.govt.nz/UserFiles/File/Publications/Building/info-sheets/c-vm2-information-sheet-2013-12.pdf



  »GOOGLE VERIFIED
  »ENGINEERING TERMS AND CONDITIONS
  »REVISITING OUR HERITAGE
  »FURTHER CHANGES PROPOSED TO NZBC C PROTECTION FROM FIRE
  »REDUCING PARTITION WALL FAILURE IN SEISMIC EVENTS
  »BUILDING CODE UPDATED REFERENCES
  »MEDIUM DENSITY HOUSING RESOURCE PAGE
  »SPECIFICATIONS HOW-TO
  »DETAILED ENGINEERING EVALUATION TOOLS FROM SESOC
  »BIM FOR ALL - DUMMIES OR NOT
  »MASTERSPEC'S PRODUCT RANGE SUPPORTS MULTI-DISCIPLINARY TEAMS
  »SPECIFICATIONS AND CONTRACTS
  »BUILDING ACT 2004 AMENDMENTS
  »SURFACE FIRE PERFORMANCE OF INSULATION IN PLENUMS AND DUCTS
  »CHANGES TO THE BUILDING ACT – HOW DO THEY AFFECT ARCHITECTS, DESIGNERS AND DESIGN/BUILD
  »WHAT IS THE PURPOSE OF A SPECIFICATION???
  »NZBC C PROTECTION FROM FIRE - AMENDMENTS DECEMBER 2013
  »AMENDMENTS TO NZS 4211
  »STRENGTHENING NEW ZEALAND’S STANDARDS SYSTEM – TRANSITION PROJECT
  »2014 INTERNATIONAL BIM REPORT
  »UPDATED GUIDANCE FOR EXEMPT BUILDING WORK
  »TACTILE GROUND SURFACE INDICATORS (TGSIS)
  »STREAMSIDE PROTECTION AND GUIDES TO RESTORATION
  »SEISMIC RESTRAINTS FOR GAS, WATER HEATERS & APPLIANCES
  »CHANGES TO NZBC C PROTECTION FROM FIRE - 1 JULY 2014
  »CHANGES TO H3.1 FOR SOLID TIMBER FRAMING
  »FIRE SAFETY AND DESIGN – FURTHER READING
  »AS 3566.2 WITHDRAWN BY STANDARDS AUSTRALIA BUT IN E2/AS1?
  »AIR CONDITIONING REFRIGERANT SAFETY
  »WHAT IS GOING ON WITH HEALTH & SAFETY?
  »FURTHER WORKED EXAMPLES TO ACCOMPANY THE SEISMIC DESIGN OF RETAINING STRUCTURES GUIDANCE
  »PASSIVE HOUSING – GENERAL DESIGN PRINCIPLES
  »SPECIFYING FIRE BLANKETS
  »DESIGN AND BUILD - REASONS FOR CONSENT DELAYS
  »AS/NZS 2312 SPLIT UP AND AMENDED
  »FIRE PERFORMANCE OF FLOOR COVERINGS LAID OUT
  »CODEMARK CERTIFICATION POPULAR WITH PRODUCT PARTNERS
  »LOW EMISSIVE GLASS COATINGS - SURFACE 2 OR 3 – WHAT SHOULD IT BE?
  »INTERIOR NOISE CONTROL - TRYING TO UNDERSTAND ACOUSTICS
  »MASTERSPEC INTERVIEW: ANDREW MAYNARD
  »DRAINAGE, LAYING OUT THE OPTIONS
  »ELECTRONIC LEAK DETECTION OF MEMBRANES
  »INTERIOR ELEMENTS - BUILDING CODE REQUIREMENTS CHECKLIST
  »NEW GENERIC SECTION 4239 SOFFIT CLADDING
  »SECTIONS CHANGE AS SOME INSULPRO PRODUCTS REBRANDED AS MAMMOTH
  »MASTERSPEC RELEASE 12 NEW SERVICES ENGINEERING WORK SECTIONS.
  »STRUCTURALLY FIXED CAVITY BATTENS
  »CHANGES TO THE LAMINEX GROUP
  »WORK SECTION UPDATES AND DELETIONS FOR JULY 2015
  »ALTERNATIVE TEST METHODS FOR ACHIEVING NZBC C GROUP NUMBERS.
  »CONCRETE SLABS - FREE JOINTS OR SHRINKAGE CONTROL JOINTS???
  »DRAINAGE GENERAL NAME CHANGE
  »ROOF SAFETY MESH - AS/NZS 4389 UPDATED
  »PLUMBING AND DRAINAGE - AS/NZS 3500.1 AND AS/NZS 3500.2 UPDATED
  »NEW BASIC SECTION FOR PLYWOOD AND PARTICLEBOARD FLOORS
  »GREEN BUILDING REQUIREMENTS IN THE RESIDENTIAL SECTOR
  »NEW SECTIONS FOR MASTERSPEC BASIC AND INTERIORS USERS
  »HEAT PUMP WATER HEATERS NOW AN OPTION
  »WELDING GALVANIZED OR THERMAL SPRAYED STEEL
  »MAJOR CHANGES TO THE CARPENTRY BASED SECTIONS IN MASTERSPEC BASIC AND INTERIORS
  »A COLLECTION OF COUNCIL DEVELOPMENT, SUBDIVISION AND ENGINEERING GUIDES
  »NEW NZS 4407 - ONE ROAD AGGREGATE STANDARD TO UNITE THEM ALL
  »PLUGGING INTO ELECTRIC CARS
  »PUTTING MORE INTO 2242 BACKFILLING
  »AS/NZS 3500.4 HEATED WATER SERVICES UPDATED
  »MAJOR CHANGES TO THE CONSTRUCTION CONTRACTS ACT
  »AS/NZS 1668.1 VENTILATION AND AIR-CON FIRE AND SMOKE CONTROL
  »HEALTH AND SAFETY AT WORK ACT 2015 AND THE SPECIFICATION
  »COMPATIBILITY AND ADHESION OF WET SEALS AND SILL TAPES IN WINDOW INSTALLATIONS
  »JMF TIMBER WINDOW AND DOOR JOINERY CAN BE SPECIFIED ON A ‘TEST’ BASIS
  »STEEL STRUCTURES - NZS 3404.1: 1997 VERSES NZS 3404.1: 2009
  »ASBESTOS REMOVAL NEW LICENCE REGIME
  »MBIE PRODUCT ASSURANCE SEMINARS FOR SUPPLIERS/MANUFACTURERS
  »RESIDENTIAL CONSTRUCTION HANDOVER
  »A BIG MONTH OF CHANGES TO STANDARDS
  »INTERNATIONAL BIM OBJECT STANDARD TO BE RELEASED
  »NON-COMPLIANT CONCRETE REINFORCEMENT
  »TIPS FOR SPECIFYING FIXED AUDIENCE SEATING
© 2017 Construction Information Limited
Construction Information Limited Construction Information
Powered by streamSWEET CMS  
Feedback