october 28 th 2011 irc - codes report. 2 codes update outline –code development update –project...
TRANSCRIPT
2
Codes Update
• Outline– Code Development Update– Project Updates
• Policy-Related Activities (Executive Committee)
• Part 9 related work – Joint Tasks with Other Committees
– Energy efficiency in Housing and Small Buildings
– Upcoming Meetings – Schedule
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Code Development Update
• Publication Dates– NECB is being published – November 18th , 2011– Publication alignment for 2015 codes under discussion
• First Public Review towards 2015 NBC, NFC, NPC– Right Now – www.nationalcodes.ca – October 24th to December 16– 1 Part 9 Interim change: Reference ASTM Nailing Standard– 1 Part 9 change: Anchorage requirement held back
• Public Review on Energy Delayed– January 9th to February 24th 2012
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Policy–Related Activities
• Currently Active Tasks– New Objective – Water-Use Efficiency (TG Scoping)– Renewal of the Farm Building Code (TG Scoping)– Sprinklers, Stairs, Guards, Fire Performance of Houses – Removal of an Objective
• Activities about to get underway …– Energy Target for the NECB (CCBFC ballot to approve task)– TG on Review of the Code Development System– TG on Harmonization (Provincial-National)– TG on Impact Analysis (Phase 2)
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Policy–Related Activities
• Sprinklers– Request: EC asks SCHSB and SCFP for assistance
to inform policy considerations
– Approach: Joint HSB/FP Task Group • TG Mandate: Review cost/benefit data & asses technical merit• TG Status: SC review and approval of Terms of Reference
• Step Dimensions (7”-11”)– Request: EC asks SCHSB and SCUE for assistance
to inform policy considerations
– Approach: Subtask group of existing Joint Task Group on Stairs• sTG Mandate: Review of benefit studies & Developing cost impact• sTG Status: SC review and approval of Terms of Reference
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Policy–Related Activities
• Climbable Guards– Direction:
• EC will communicate CCBFC concerns to Standing Committees
• EC will clarify that new code change request can be considered
• Fire Performance of Houses– Direction:
• EC will ask SCHSB for assistance (with help from FP) to inform policy considerations
• Assess impact of research findings on current code & objectives
– Approach:• HSB TG with expertise from FP
• Mid-Rise Construction (not Part 9)
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Part 9 Work
• Joint Tasks with Other Committees (ES – Part 5)– EIFS
• Progress: reviewed standards (4 meetings)
• Next meeting: January 19th 2012
• Approach: – reference S716.1, 2 and 3 standards in a separate Subsection in 9.27
– Add rainscreen-EIFS as acceptable option in 9.27.2.2
• Outstanding work: – review 9.27.3 , 9.27.4. and 9.27.5 for conflicts
– cross-references to » 9.25. – vented cavity» 9.10. – foamed plastics » 9.23.13. – lateral bracing
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Part 9 Work
• Joint Tasks with Other Committees (ES – Part 5)– Sound Transmission between Dwelling Units
• Progress: 3 meetings
• Next Meeting: January 2012
• Approach
• Flanking noise will be addressed by – Existing Sound and fire Tables
– additional information in tables
Compliance Path Part 5 Part 9
Performance Statement Assembly Testing Path
Design path
(Comprehensive)
(Simplified) Prescriptive Solutions
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Part 9 Work
• Joint Tasks with Other Committees (ES – Part 5)– Roofing, Waterproofing, Dampproofing Standards
• Progress: Developed code language to replace application standards - SCES rejected
approach
• Next meeting: January 2012
• Approach: – Replace material standards
– Find ASTM/International equivalents for application standards
• Outstanding work: – Identify and review potential standards
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Part 9 Work – Energy Efficiency
• Executive Committee – Guidance – Overall Cost-benefit Calculations:
• Whole house analysis – YES
• Simple Payback – NO
• Value Index – NO
• Incremental Construction ($) & Energy Benefit ($)
– Division C – reporting requirements • Compliance Report required
• Compliance Report can be generated by HOT2000
• “check-list” like approach
– Development of Public Consultation Document
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Part 9 Work – Energy Efficiency
• New subjects or significant revisions– Changes to Application
Building Type
Compliance Options Part 9 -
Prescriptive Part 9 -
Performance NECB
houses,houseswithsecondarysuites, buildingscontainingonlydwellingunitswithcommonspaces≤20%floorarea
X X X
- purelyresidentialbuildings- anybuilding,whereallnon-residentialportions(notF2)haveafloorarea≤300m²
X X
anybuildingwherenon-residentialoccupancieshaveafloorarea>300m²
- buildingscontainingF2occupancies(anysize) X
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Part 9 Work – Energy Efficiency
• New subjects or significant revisions– Changes to attic requirements?
– Site-built windows ?
– HVAC duct alternative !
– Simple Trade-Off Examples !
– Simple Trade Off Limits ?• Opaque-to-Opaque option
– Difficulties to characterize attic spaces (roof shapes, styles)– Limits may have to be introduced (vertical/vertical only, certain minimum
geometries)
• Transparent-to-Transparent– Limit on solar heat gain coefficient – maximum allowable increase of U-value
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Part 9 Work – Energy Efficiency
• Changes to attic requirements– Intent to avoid requiring high heel trusses– Modeling done without high heel trusses– Currently proposed
• Slope not more than 1200mm projection
• Perimeter at least at Wall R-value
– Current Practice• Slopes 5/12 to 7-12 are most common
• 30% - 40% of truss designs already comply
• Mostly affects low slopes
– New Proposal (to be discussed)• Regulate truss minimum heel height?
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Part 9 Work – Energy Efficiency
• Site-built windows– Introducing prescriptive alternative– To be discussed
Construction Max. U Req’d U
For climate zones 4 and 5: Non-metallic frames +triple glazing, 12.7 mm spacer 2.14
1.8double glazing, 1 low-e (e ≤ 0.10), argon, non-metallic spacer 2.02
For climate zones 6 and 7a: Non-metallic frames +triple glazing, 12.7 mm spacer, argon, 1 low-e (e ≤ 0.20) 1.78
1.6triple glazing, 12.7 mm spacer, 2 low-e (e ≤ 0.20) 1.74
For climate zones 7b and 8: Non-metallic frames +triple glazing, 12.7 mm spacer, 2 low-e (e ≤ 0.10) 1.61
1.4triple glazing, 12.7 mm spacer, argon, 2 low-e (e ≤ 0.20) 1.57
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Upcoming Meetings – Schedule
• Standing Committee on Housing and Small Buildings– November 16-18 – Vancouver – Part 9 Energy Efficiency – February 2012 – Ottawa – Non-energy subjects– April/May 2012 – Ottawa – Part 9 Energy Efficiency
• Standing Committee on Energy Efficiency in Buildings– November 9-10 – Ottawa – Part 9 Energy Efficiency
• sTG – Code Consolidation (EEHSB)– March 2012 – Ottawa – Review of Public Review Comments
• Commission on Building and Fire Codes– July 2012 – TBD – Approval of Part 9 Energy Efficiency