Z240 MH Series Manufactured Homes

Z240 MH Series Manufactured homes Proposed Updates to 2009 Edition

Technical Committee Review of Draft – 06 January 2014

Z240.2.1 Structural Technical Requirements for Manufactured Homes

A. General Approach

Z240.2.1 currently addresses much more than structural design; it is proposed that this part of the MH Series re-titled Technical requirements for manufactured homes and serve as the main technical standard for this product.

The National Building Code is referenced in the general requirement and provisions have been retained only as needed to provide additional requirements or exceptions that are particular to manufactured homes. This allows the withdrawal of Z240.9.1 on load calculations an ducting. A cross-reference to Z240.4.1 has been added. (Z240.4.1 and Z240.5.1 are proposed to be combined to reduce repetition; see Z240.4.1 and Z240.5.1 below.) The document “Z240.2.1 Contents” indicates where provisions have been added or deleted.

B. Technical Changes, and Unique Editorial/Technical and Editorial Changes

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 1 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision Title E/T Change The requirements “Structural” currently provided in to Z240.2.1. go far beyond “Technical” what are normally considered to be structural requirements.

1 Scope 1.1 preamble E Replace “Quality” is undefined “quality of and open to work” with interpretation. “Practice” “practice” more accurately describes what the standard addresses. Clause (a) E Add To provide information on “including what is included in resistance to “rigidity” vibration and deflection” Clause (d) E Delete Clause Redundant; addressed by Clause (b) and by other objectives Clause (e) E Delete Clause “Durability” is an undefined term. Redundant; addressed by Clause (b)

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 2 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision Clauses E Insert To recognize issues (d) to (g) objectives addressed in the Standard; consistent with NBC objectives 2 Reference Publications preamble T Refer to Keeps the standard up to editions in date with the codes or force at the standards referenced by installation the AHJ where the MH location Series is recognized CSA CAN/CSA- T Delete The CSA A440 standard A440 & and A440.1 User guide A440.1 have been superseded by the referenced AAMA/WDMA/CSA standard (see below) CAN/CSA- E Delete Redundant; referenced B365 through reference to NBC CAN/CSA- E Delete Redundant; referenced B366.2 through reference to NBC CAN/CSA- __ No change Retained; referenced in a O86 note. CAN/CSA E Delete Redundant; referenced -O132.2 through reference to NBC O132.5 E Delete Redundant; referenced through reference to NBC

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 3 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision O141 E Delete Redundant; referenced through reference to NBC CAN/CSA- E Delete Redundant; referenced S16.01 through reference to NBC CAN/CSA- E Delete Redundant; referenced S136 through reference to NBC CAN/CSA- E Delete Redundant; referenced S136S1 through reference to NBC CAN/CSA- E Delete Redundant; referenced S157 & through reference to NBC S157.1 S307 E Delete Redundant; referenced through reference to NBC. Note: Reference to this standard may be deleted from the NBC as compliance is normally by calculation.. CAN/CSA- E Insert Proposed to be Z240.4.1 referenced in Z240.2.1 AAMA/WD E Delete Redundant; referenced MS/CSA through reference to NBC A440S1 E Delete Redundant; referenced through reference to NBC CWC Engineeri -- No change Retained; referenced in a ng Guide note.

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 4 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision CGSB CAN/CGS E Delete Redundant; referenced B-1.501 through reference to NBC CAN/CGS E Delete Redundant; referenced B-12.1 through reference to NBC CAN/CGS E Delete Redundant; referenced B-55.33 through reference to NBC CAN/CGS E Delete Redundant; referenced B-51.34 through reference to NBC CGSB/ANSI/BHMA CAN- E/T Delete “CAN- Withdrawn as a CGSB CGSB- CGSB-69.18- standard in 2003 69.18- M90/” M90/ T Update Retained; not referenced ANSI/BHM reference to in the NBC. A A156.1- 2006 1981 CGSB CAN/CGS E Delete Withdrawn; addressed by B-82.1 AAMA/WDMA/CSA- 101/I.S.2/A440 which is referenced in the NBC NRCC NBC T Update reference to 2010 NLGA

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 5 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision Standard E Delete Redundant; referenced Grading through reference to NBC Rules ULC CAN/ULC- E Delete Redundant; referenced S102 through reference to NBC CAN/ULC- E Delete Redundant; referenced S531 through reference to NBC CAN/ULC- E Delete Redundant; referenced S610 through reference to NBC 3 Definitions Habitable E Delete Term not used in the room standard 4 General requirements 4.1 Compliance (heading) E Change To more clearly reflect heading from the content of the “Minimum provisions requirements ” to “Compliance

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 6 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision (provision T Specify See General Approach ) compliance above. More and more with the NBC requirements in the as the basic standard refer to the NBC compliance or provide copies of NBC requirement requirements. A single reference allows for deletion of multiple cross- references and copied requirements Note (1) E Add note. Explains that provisions in the standard are in addition or exceptions to the requirements of the NBC Note (2) E Replace Notes are not mandatory “Shall be so mandatory language considered” should not be used with “are” E/T Insert The note applies equally reference to to the NBC. the NBC Note (3) E/T Replace “Quality” is undefined “quality of and open to work” with interpretation. “practice 4.2 Construction Methods and Practice

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 7 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision (heading E Replace “Quality” is undefined and “quality of and open to provision) work” with interpretation. “practice (provision E/T Move the “Durable” and “livable” and Note) intent to a are undefined so should Note not be specified in a replacing requirement. Nothing can “ensure” with ever truly be “ensured.” “provide”. 4.3 Equivalence 4.3.1 General E Delete “new” Unnecessary; not clear if this is new rather than used or new as in innovative preamble E/T Insert The provision applies reference to equally to the NBC the NBC T Insert To state the basic “achieve at criterion of achieving least the equivalent level of minimum performance level of performance required by this standard and shall” Clause (a) E Move from Describes an option to preamble testing.

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 8 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision 4.3.2 Test Procedures --- E 1. Delete Unnecessary reference to Clause 4.1 E/T 2. Change Should apply to all “structural equivalence testing not ” to just structural. “required” T 3. Insert Should apply to all “compone elements of the building nt” and and its construction “assembly including, for example, ” windows, doors, walls, roofs. 4.3.3 Independent testing --- E Delete Unnecessary or clause reference to moved. Clause 5.1.3.1. Replace reference to 5.1.3.2 with 4.3.2. 4.3.4 Verification (heading) E Add heading To make information easier to find

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 9 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision (provision E Replace “the Does not apply to ) CSA-Z240 MH Z240.0.1. Reference in Series of Z240.2.1. to other Standards” Standards in the Series with “this applies the provision as Standard” applicable. Note E 1. Replace Consistent with correct “Clause” terminology re. NBC with structure “Section” E 2. Add “to To make clear that the requireme requirements in the nts in the referenced provisions NBC” apply to the NBC requirements 4.2 Minimum requirements sentence E Delete Addressed in 4.1 1 sentences E Delete Provided in Note (2) to 2 and 3 Clause 4.1 5 Materials (heading) E Insert To make information heading easier to find 5.1 Lumber

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 10 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision 4.4.1 Grading E Delete Clause CSA O141 is in NBC by and Table 1 reference to NLGA Re. Table 1, NBC does not differentiate based on width, and allows standard grade for all load bearing and utility grade for all non- loadbearing. There does not appear to be any reason for the more stringent requirements in Z240. 4.4.3 Trusses E 1. Delete In NBC by reference to reference test standard. to testing

E 2. Delete Alternatives must be in sentence accordance with O86 in on any case per NBC equivalenc e 6 Structural design 6.1 Compliance

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 11 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision (heading) E replace To better identify the “General” issue addressed by the with clause “Compliance”

6.1.1 Design and construction (provision No change First sentence is retained ) largely for information. Second sentence needed to address in-transit loads Note E Replace NBC and CWC references references to covered by general NBC and reference to the NBC. CWC Clause 6.2.1 addresses Engineering additional in-transit wind Guide with load. reference to Clause 6.2.1 5.1.2 Structural E/T Delete Addressed by NBC. members and their connectio ns

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 12 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision 5.1.3 Equivalen E Delete All equivalency provisions cy of provided in Clause 4.3. performa Reference to engineering nce design redundant; provided in Clause 4.1 6.2 Loads Note E Delete Referenced clause proposed to be deleted 5.2.1. Floor E Delete Addressed by general loads reference to NBC. 5.2.2 Specified E Delete Addressed by general snow reference to NBC. loads

6.2.1 Wind Loads 6.2.1.1 Wind loads on walls (heading) E 1. Add To make information heading easier to find (preambl T 1. Add “and Home must be e) constructe constructed to resist d” loads

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 13 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision T 2. Replace If the design wind load at “full design the installation location is wind load greater than 0.7 kPa, the of at least home must be designed “ with “the and constructed to the greater greater load. design wind pressure of” E 3. Change Consistent with accepted “load” to engineering terminology “pressure” Clause (b) T insert “the As above design hourly wind pressure at the installation site” 6.2.1.2 Wind loads on roofs (heading) E 1. Add To make information heading easier to find (preambl T 1. Add “and Home must be e) constructe constructed to resist d” loads

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 14 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision T 2. Replace If the design wind load at “full design the installation location is wind load greater than 0.7 kPa, the of at least home must be designed “ with “the and constructed to the greater greater load. design wind load of” E 3. Change Consistent with accepted “load” to engineering terminology “pressure” Clause (b) T insert “the As above design hourly wind pressure at the installation site” Note E insert Note To explain the minimum stated design wind pressure 6.2.1.2 Component fastening E Revise cross references 6.3 Floor Deflection (heading) E Revise to NBC reference addresses refer to floors all other deflections

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 15 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision Note E Delete Referenced Clause proposed to be deleted 6.3.1 General 6.3.1.1 Structural Members (heading) E Delete Not needed with deletion of clause 5.3.1.2. (preambl E/T Delete Deflection limits apply e) reference to regardless of design engineering approach design and testing (preambl E/T 1. Floors Retain limit for floors e and - Replace only. Less stringent than sub- “structural NBC. clauses) members” See below for roofs. with “floor joists and floor trusses” and “L/240” - Delete sub- clause (a)

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 16 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision 2. Roofs Minimal differences with - Delete sub- NBC clauses (b) Roof beams and rafters to (e) - 3 deflection limits consistent with NBC - 1 limit more stringent - 1 limit less stringent Trusses - differences only pertain to testing - limits the same as NBC but NBC includes dead load See “Z240 – Implications of Major Proposed Changes”. Note (2) E Delete Note does not explain exception for floors; NBC Part 9 limit of L/360 applies to all cases including floors with no ceiling below.

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 17 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision 5.3.1.2 Subfloor T Delete This deflection is excessive and does not reflect the material requirements for subfloors. - 3 mm/16" o.c. = L/135 - 3 mm/24" o.c. = L/203 To achieve L/240, deflection would have to be limited to - 1.7 mm @ 16” o.c. and - 2.54 mm @24” o.c. To achieve L/360 - 1.13 mm/16” - 1.69 mm/24” 6.3.2 Cantilever Assemblies 5.3.2.1 Note E Replace In NBC clause with a Note 6.3.2.1 Prescriptive criteria for narrow units (heading) E Add heading To make information easier to find

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 18 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision E Provide To make finding maximum information easier unit width, minimum joist dimensions and grade, and maximum spacing in a list

6.3.2.2 Performance criteria for longer cantilevers (heading) E Add heading To make information easier to find No change to Retain to describe test technical criteria for acceptable requirement alternative solution. E Insert To make clear that the reference to exception relates to both base the NBC and Z240 requirements requirements in the NBC 6.4 Anchorage of the home (headings E Add headings To make information ) easier to find. 6.4.1 Application

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 19 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision -- E/T Insert To make clear that the application requirements apply only statement to homes on surface foundations 6.4.2 Standard -- E/T Change To make clear that the “geographica conditions at the specific l location of” installation site are of to “site concern conditions at the installation location for” 6.4.3 Attachment (heading) E Add heading 6.4.4 Instructions, fittings and fixtures (heading) E Add heading 6.5 Floor framing attachment to building support frame (heading) E change To better describe the “Floors” to subject of the Floor framing requirements attachment to building support frame”

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 20 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision 6.5.1 Modules up to 4.3 m wide E/T Change “the More accurate floor” to identification of element “floor to be secured framing” E Change Table Existing Table 1 is 2 to Table 1 proposed to be deleted 6.5.2 Modules more than 4.3 m wide E/T Change “the More accurate floor” to identification of element “floor to be secured framing” 6.6 Wall Framing (heading) E Change More accurately describes ”Walls” to the subject of the “Wall requirements framing” 5.6.1 General E Delete Provisions under heading proposed to be deleted 5.6.1.1 Load E Delete Redundant; addressed in Transfer Clause 6.1.1. and NBC 6.6.1 Studs (heading) E Change More accurately describes “Framing the subject of the construction” requirements to “Studs”

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 21 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision (provision E/T 1. Delete Table proposed to be ) reference deleted; addressed by to Table 3 NBC E 2. Insert Needs to be retained as exception 1”x3” studs are not to permit recognized by the NBC 19x64 mm (1”x3”) studs 5.6.2 Framing T Delete For loadbearing walls, for NBC requires: openings - doubling of studs where the opening is more than one stud space wide or there is an opening in an adjacent stud space - tripling of studs for openings wider than 3 m. There does not appear to be a reason for the less stringent Z240 provision. Good practice should adequately cover the configuration of the inner and outer stud. 5.6.3 Framing E Delete Provisions under heading over heading proposed to be deleted openings

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 22 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision 5.6.3.1 Non- E Delete In the NBC loadbeari ng stud walls 5.6.3.2 Loadbearin T 1. Delete The requirement needs to g stud reference be updated. walls to Table 4 - Table 4 values for lintel depths correspond to NBC spans for 1.0 to 1.5 kPa specified snow loads. - NBC tables provide values that apply to 286 to 416 locations that have greater snow loads and reflect changes in wood properties. - With current energy requirements, the use of 38 mm x 64 mm (2”x3”) loadbearing studs is unlikely. See also comments on Table 4 and “Z240 – Implications of Major Proposed Changes”. T 2. Delete Addressed in NBC requireme nt for fastening

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 23 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision E 3. Delete Addressed by Clause 4.3 reference and in NBC to accepted engineerin g practice 6.6.2 Stud wall top No change Noted that the NBC plates specifies a less stringent maximum 50 mm roof frame off-set from studs. 5.6.5 Stud wall E Delete In NBC bottom plate

6.7 Nailing of wood framing (headings E Add headings Makes information easier ) to find 5.7.1 -- E Delete In NBC

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 24 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision 5.7.2 (introducto T Delete Criteria for nailing, aside ry phrase) from those proposed to be retained in the standard, are provided in NBC Tables 9.23.3.4. and 9.23.3.5. A & B. - Some criteria are more stringent, some are less; see notes inserted into the Table in the Standard. - NBC provides additional criteria for fasteners in framing to address resistance to lateral loads. - NBC recognizes OSB & waferboard sheathing. See also “Z240 – Implications of Major Proposed Changes” 6.7.1 Fastening of floor joists to rim joists No change Information from Table 5 to be retained. Criteria not provided in NBC 6.7.2 Fastening of roof trusses to roof side plates

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 25 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision No change Information from Table 5 to be retained. Criteria not specified in NBC

6.7.3 Fastening of trusses to walls (preambl E Change Information from Table 5 e) reference to is proposed to be moved Table 5 to to Clause 6.7.2. Clause 6.7.2 (sub- E 1. Provide To make information clauses) criteria in easier to find list. E 2. Delete “or Equivalence applies to all equivalent provisions staples” 6.7.4 Fastening of belt rails to studs E Insert Information from Table 5 to be retained. Criteria not provided in NBC 6.7.5 Adhesives in lieu of nailing in structural assemblies (heading) E Change To more clearly describe “used” to “in the subject of the lieu of provision nailing”

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 26 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision Note E 1. Change In NBC; retained for reference information. to standard to Note E 2. Delete Redundant; equivalence sentence applies to all provisions on other adhesives 5.9 Interior E Delete Addressed by preceding partitions requirements

5.10 Subflooring (provision E Delete Addressed by general ) reference to the NBC Note E Delete NBC recognizes Classes D-2 and D-3 in in ANSI A208.1 5.11 Roof E Delete Addressed by general sheathing reference to the NBC 5.12 Wall E Delete Addressed by general sheathing reference to the NBC 5.13 Wall E Delete Addressed by general sheathing reference to the NBC membran e 7 Building Envelope

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 27 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision (heading) E Replace Better describes the “Construction subject of the ” with requirements “Building Envelope” 6.1 Roofing E Delete All sub-clauses proposed heading to be deleted 6.1.1 -- E Delete In NBC 6.1.2 -- E Delete Addressed by general reference to the NBC 7.1 Siding attachment Heading E Add Better describes the “attachment” subject of the provision E/T 1. Replace “ To recognize that the “front of a front of the home may manufactur not be the “front” of the ed home” module during transport with “end of the module facing forward for transport” E/T 2. Replace “ A mandatory requirement “needs to” needs to be in mandatory with language “shall” 7.1.1 Metal panel siding

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 28 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision (heading) E Add heading To make information easier to find (preambl E Delete Addressed by general e) reference to reference to the NBC NBC E Add To recognize the reference to exception provided in Clause 7.1.2 Clause 7.1.2 E Delete Existing Clause 5.7 reference to references Table 5 which existing is proposed to be deleted. Clause 5.7 Text in requirement has been moved from Table 5 7.1.2 Lock-seam metal siding (heading) E Add heading To make information easier to find T Question Is lock-seam metal siding still used? 6.3 Air E Delete Addressed by general leakage reference to the NBC and condensa tion control 6.4 Thermal E Delete All sub-clauses proposed Insulation heading to be deleted

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 29 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision 6.4.1 General T Delete Addressed by general reference to the NBC. Because the NBC specifies effective thermal resistance, differences between the NNBC and Z240 values may be more or less significant depending on framing materials and centres. NBC values are lower than Z240 for cathedral ceilings, flat roofs and for walls where an HRV is installed. Smallest increases apply to walls, and to floors in the warmer climate zones (4 to 6). Largest increases apply to attics. See “Z240 – Implications of Major Proposed Changes” 6.4.2 Installatio E Delete In NBC n 6.4.3 Access E Delete Addressed by general Hatches reference to the NBC.

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 30 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision 6.4.4 Soffit E Delete In NBC vents 6.4.5 Fire E Delete Addressed by general Protection reference to the NBC. 6.7.1 Windows E Delete All sub-clauses proposed heading to be deleted 6.7.1.1 General E 1. Delete Superseded by reference AAMA/WDMA/CSA- to 101/I.S.2/A440 and CAN/CSA- A440S1 A440 and A440.1 E 2. Delete In NBC reference to AAMA/WD MA/ CSA- 101/I.S.2/ A440 and A440S1 6.7.1.2 Installatio E Delete NBC references n manufacturer’s instructions and CAN/CSA-A440.4, “Window, Door and Skylight Installation” 6.9.2 Exterior E Delete All sub-Clauses proposed doors heading to be deleted

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 31 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision 6.9.2.1 Wood Doors E 1. Delete Referenced in the NBC reference to CAN/CSA- O132.2 T 2. Delete Superseded by reference AAMA/WDMA/CSA- to 101/I.S.2/A440 which is CAN/CSA- referenced in the NBC O132. E/T 3. Delete 45 Addressed by referenced mm standards minimum thickness T 4. Delete 35 There is no reason why mm “secondary” doors should thickness be of lesser construction. Depending on the house design and use, a secondary door may see more use than a primary door. 6.9.2.2 Sliding T Delete CAN/CGSB-82.1 glass superseded by doors AAMA/WDMA/CSA- 101/I.S.2/A440 referenced in the NBC

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 32 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision 6.9.2.3 Storm or T Delete Storm doors are not combinati required; specification of on doors minimum thickness is not needed. 6.9.2.4 Weather- T Delete In NBC by reference to stripping AAMA/WDMA/CSA- 101/I.S.2/A440 6.9.2.5 Additional E Delete Addressed by NBC protectio through referenced n AAMA/WDMA/CSA- 101/I.S.2/A440, A440.4 installation standard and NBC Article 9.27.4.1. 6.9.2.6 Wood T Delete A440.4 superseded by door AAMA/WDMA/CSA- frames 101/I.S.2/A440 which is referenced in the NBC 6.9.2.7 Steel E Delete In NBC through reference door to AAMA/WDMA/CSA- frames 101/I.S.2/A440 and the Canadian Supplement 6.9.2.8 Thermal resistance

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 33 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision T 1. Delete Some minimum level of limit to thermal performance application should apply in all climate regions. Design temperature is not an appropriate metric; locations with design temp warmer than -15 ˚C have heating degree days (hdd) ranging from 2600 (Ladner, BC) to 5000 (Bonavista, NL) T 2. Delete Note: RSI 0.7 = USI 1.43. minimum Z240 is more stringent RSI than NBC 9.7.3.3. for condensation resistance and the new 9.36.2.7. for energy efficiency, except for - the exempted region (design temp warmer than -15 ˚C), and - the two coldest climate zones (6000 hdd or more) where max U of 1.4 is specified for energy efficiency.

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 34 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision T/E 3. Delete Redundant; with RSI or reference USI specified, double to double glazing need not be glazing specified. 6.7.3 Attic E Delete All sub-clauses proposed Ventilati to be deleted on 6.7.3.1 General T Delete In NBC with exceptions permitted. 6.7.3.2 Natural E Delete In NBC ventilatio n 6.7.3.3. Vent T Delete In NBC. NBC also types and specifies clearances and distributio references the CSA n standard for vents - which should be addressed in any case. 6.7.3.4 Powered T Delete Not needed (or ventilatio recommended); n equivalents apply in all cases. 7.3 Underfloor sheathing (no change) 7.4 Rodent protection

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 35 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision (heading) E Replace To more clearly identify “Rodents” the subject of he with “Rodent requirement. protection” Note E Add Note To explain that protection does not apply only to the installed home. 6.9.3 Door E Delete All sub-clauses proposed hardwar heading to be deleted e 6.9.3.1 Hinges T Delete all Addressed by NBC for clauses through reference to exterior AAMA/WDMA/CSA- doors 101/I.S.2/A440 6.9.3.4 Locks T Delete In NBC 8 Interior finishes and door hardware (heading) E Change To better describe the ”Interior subject of the surfaces” to requirements “Interior finishes and door hardware” 8.1 Wall and ceiling finishes 6.5.1.1 Flame E/T Delete In NBC. 9.10.17.1.; NBC spread also addresses skylights rating and exterior doors which should be addressed.

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 36 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision 8.1.2 Plywood E Change Table Various Tables proposed thicknes reference. to be deleted. s Question – Noted that NBC Table should 9.29.6.1. specifies a criteria be minimum 4.7 mm for the same as finishes with support 400 the NBC? mm o.c. and no blocking and for support 600 mm o.c. with blocking while Z240.2.1 specifies minimum 4.0 mm for these cases 8.1.3 Grooved E/T 1. Move panels “unless” from the end of the Clause structure is preamble incorrect; both (b)(i) and to the (b)(ii) must apply beginning together for an of item (a) acceptable approach. and item (b) Proposed change is consistent with NBC 2. Insert “or” requirement. If approved, at the end provision may be deleted of item (a) and NBC will apply. 3. Insert “and” between (i) and (ii) of item (b)

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 37 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision 6.5.1.4 Non- E Delete Addressed by general plywood reference to NBC. finishes 6.5.3 Fire protection around gas and electric ranges 6.5.3.1 Vertical E/T Delete In NBC; NBC also provides clearance an exception to allow reduced clearance with range hood. 6.5.3.2 Cabinets E Delete Addressed by general reference to NBC. 6.5.3.3 Wall E/T Delete No apparent reason for framing (specifies lower level of protection. members protection up NBC specifies protection to 150 mm up to 450 mm with min. with min 7.5 9.5 mm gypsum board mm gypsum but also specifies board) exceptions for splash boards and cabinets installed with required vertical clearance. 6.5.4 Floor E Delete Addressed by general covering reference to NBC. s

6.7 Light and ventilation

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 38 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision (heading E Delete All provisions moved or proposed to be deleted; Windows and attic ventilation addressed in 7.3 under Building Envelope 6.7.2 Ventilati E Delete Addressed by general on and reference to NBC. mechani cal air change 6.8 Rooms Hallways and spaces (heading) E Delete All provisions proposed to be deleted 6.8.1 Measure E Delete In NBC ment 6.8.2 Heights E Delete Reference re. minimum of rooms heights addressed by and general reference to NBC. spaces Requirement for contiguous height in NBC 6.8.3 Hallway E Delete In NBC width 6.9 Doors

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 39 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision 6.9.1 General E/T 1. Delete Unnecessary; doors will requireme be installed in all exterior nt for one doorways entrance door T 2. Delete More stringent than NBC requireme and outside the stated nt and scope of the standard. Note re. Addressed by market doors on demand. water closets E 3. Delete In NBC requireme nt for doorways to accommod ate required door sizes 6.9.3 Door hardwar e (heading) E Delete Included in heading for Clause 8 8.2 Interior door hardware

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 40 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision (heading) E Revised to To provide a heading for refer to subsequent related hardware in requirements general 8.2.1 Referenced standard (heading) E Heading To make information added easier to find (provision E Delete Standard is no longer a ) except CGSB standard. reference to Removing reference to ANSI/BHMA existing Clause 6.9.3.1.1. standard for exterior hinges removes limitations on materials, etc. so permissions are not needed

8.2.2 Hinge size (heading) E Heading To make information added easier to find 8.2.3 Doorstop no change s 6.9.4 Glass in doors (heading) E Delete All provisions proposed to be deleted

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 41 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision 6.9.4.1 Safety E Delete All provisions proposed to glass be deleted usage 6.9.4.1. -- E Delete In NBC . 6.9.4.1. -- E 1. Delete 1st In NBC 2 sentence E 2. Delete 2nd Should be in the glass sentence standard. re. marking 6.9.4.2 Doors E/T Delete In NBC 9.6.1.2.(2) by ref. with to CAN/CGSB-82.6-M mirrored Doors, Mirrored Glass, glass Sliding or Folding, Wardrobe 6.10 Exits T 1. Delete More stringent than NBC sentence for 1-storey dwellings re. max height from ground E 2. Delete Addressed by reference sentence to standards through re. exterior NBC. doors for exterior use

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 42 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision T 3. Delete More stringent than NBC sentence for dwellings. (Deadbolts re. single are permitted.) operation to open E 4. Delete Addressed by reference sentence to standards through re. thermal NBC. breaks 6.11 Bedroo E Delete Addressed by general m reference to NBC. window s 6.12 Smoke E Delete Addressed by general alarms reference to NBC. 9 Heating and air-conditioning - general (heading) E Add new To identify subject of subsequent requirement 9.1 Compliance (heading) E Add new To identify subject of requirement (provision E Add new To specify that heating ) and ventilation design must comply with accepted good practice.

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 43 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision Note (1) e Add new To explain that the compliance Clause over- rides the general reference to the NBC which would otherwise invoke provincial & territorial requirements where these exist. Note (2) E Add new To make clear that the provisions in Clauses 10 and 11 apply in addition to Clause 9. 10 Fuel-Fired Appliances (heading) E Add new To make information easier to find 10.1 Solid fuel-fired appliances (heading) E Add new To make information easier to find Note E Add new To provide information on where to find requirements for non- solid fuel-fired appliances 6.14. General E Delete All requirements 1 proposed to be deleted 6.14.1. E Delete In NBC 1 10.1. Fireplac 1 es

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 44 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision E 1. NOTE: CAN/ULC-S610 is NO change referenced in the NBC by to the reference through B365 reference “Installation Code for to Part A of Solid-Fuel-Burning CAN/ULC- Appliances and S610 Equipment” (cont’d below) CAN/ULC-S610 states that Part A of that standard applies to fireplaces in all buildings (with the exception of Subsections 6.2 Test installations and 6.3 temperature measurement). The additional requirements in Part B apply to “mobile homes”. Keeping the reference to CAN/ULC-S610 in CSA Z240 MH ensures that the requirements of the standard are applied as intended recognizing current terminology

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 45 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision T 2. Expand CAN/ULC-S610 specifies reference the application of Part B to Part B of to fireplaces in “mobile CAN/ULC- homes” while Z240 only S610 to all applies Part B to smaller manufactur homes (≤93m2) ed homes It is not clear why Z240 (see does not apply to larger exception homes: in 3. below) - the simpler Part B test installation and temperature measurement requirements - the requirements for installation instructions, attachment to the floor, chimney assemblies, and the negative pressure and drop tests.

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 46 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision T 3. Provide - CAN/ULC-S610 Clause exception 9.3.2 suggests that the to the issue for smaller homes is direct direct supply of combustio combustion air and n air interlocking flue and supply and combustion air dampers. damper The proposed exception interlock maintains the status quo requireme with respect to these nts for requirements. larger homes - Note that exceptions to the standard would preclude certification for mobile homes. - Need discussion.

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 47 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision 6.14. Space E/T Delete CSA B366 has been 3 heaters references to superseded by ULC S376 CSA B366.2 which is referenced in the NBC by reference through B365 “Installation Code for Solid-Fuel-Burning Appliances and Equipment”. - Comments similar to those for Fireplaces above except direct combustion air is required for all space heaters. - Need discussion. 10.1. Installatio E Add heading To make requirements 2 n of solid easier to find fuel-fired appliance s 10.2 Non-solid fuel-fired appliances E Add To reference reference to requirements for Z240.4.1 Installation requirements for oil- and gas-burning appliances 10.3 Location of fuel-fired appliances

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 48 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision (heading) E Heading To make information added easier to find T 1. No change Not in NBC or referenced re. standards. Is this distance needed? from door T 2. Delete The referenced NBC reference requirements do not to NBC apply to single dwelling units. Clearances are adequately addressed by appliance installation standards. 11 Ducting (heading) E Add heading To make requirements easier to find 11.1 Airtightness E 1. Move from NBC 9.36.3.3.(3) re. HVAC Z240.5.1 energy efficiency only clause requires airtightness for 8.1.3.1 ducts and plenums outside the plane of insulation and exempts exhaust ducts leading directly to the exterior. Ducting in manufactured homes may be within the plane of insulation.

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 49 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision E 2. Add cross- Normal approach reference to testing requiremen ts 11.2 Plenum clearance E Ref’s standards to be reviewed

11.3 Return air ducts 11.3. Return air duct for non-direct vent furnaces 1 (heading) E Add heading To make requirements easier to find Note E Add Note To explain the need for the requirement. 11.3. Return air duct for closet-installed furnaces 2 No change 11.4 Protection of ducts (heading) E Add heading To make requirements easier to find 11.3.1 General E Add heading To make requirements easier to find

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 50 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision 11.3.2 Interconne E Add heading To make requirements ct-ing easier to find ducts 12 Plumbing (heading) E Add heading To make requirements easier to find 12.1 Drain size and slope (heading) E Add heading To make requirements easier to find 7 Roof trusses test NOTE: While the proposed deletion of the requirements is based primarily on their inclusion in the NBC, the need for testing is limited when most trusses are engineered

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 51 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision 7.1 General T 1. Delete NBC 9.23.14.11.(5) reference references S307 in to Clauses general. 3 to 7 of - S307 Clauses 1, 2 and 8 CSA S307 address scope, limitations, supervision of the test and reporting. - S307 Clause 9 identifies acceptable performance which is the same as Z240 failure criteria. None of these need to be excluded from Z240 2 Delete Clause 7.7 addresses exception asymmetrical loading. to CSA The exception is S307 questionable and Clause 7.7 unnecessary when trusses are generally engineered rather than tested. 3 Delete NBC specifies min. 0.35 sentence kPa specified load (dead re. load plus live load) on calculated bottom chord dead load on bottom chord 7.2 Acceptance criteria

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 52 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision (heading) E Delete All provisions proposed to be deleted 7.2.1 General E Delete In NBC 7.2.2 Failure E Delete In NBC through reference criteria – to CSA S307 single trusses 7.2.3 Failure E Delete In NBC through reference criteria – to CSA S307 single trusses 13 Floor assemblies test 13.1 Application (heading) E Add heading To make information easier to find 13.1.1 General E Replace To refer to the specific reference to Clauses that describe the Clause 8 13 test with references to Clauses 13.2 to 13.3 13.1.2 Floor assemblies where outriggers add strength (heading) E Add heading To make information easier to find

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 53 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision (provision E 1. Replace To refer to the specific ) reference Clauses that describe the to Clause 8 test 13 with references to Clauses 13.2 to 13.3 E 2. “clausify” To clearly identify the testing alternatives 13.2 Test set-up 13.2.1 Test E Add heading To make information base easier to find 13.2.2 Floor assembly construction (heading) E Add heading To make information easier to find (provision T Specification Truss/joist spacing must ) construction be specified for all floor constructions and should be consistent with actual construction. 13.2.3 Support where outriggers not considered (heading) E Add heading To make information easier to find

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 54 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision (provision E 1. Move Specification of truss/joist ) specificatio spacing applies to all n of cases truss/joist spacing to 13.2.2. E 2. Delete Test requirements should “tested in be provided under Test pairs” procedure, rather than test set-up. 13.2.4 Support where floor and chassis considered (heading) E Add heading To make information easier to find 13.3 Testing procedure 13.3.1 Centre span procedure 13.3.1. Load test T Delete Lower load no longer 1 reference to acceptable 1.4 kPa load

13.3.2 Cantilever span procedure 13.3.2. Applicatio E/T State Limits to application must 1 n application of be identified. the procedure

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 55 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision 13.3.2. (headings E Add headings To make information 2 to ) easier to find 13.3.2. 5 13.3.2. Simulated E/T Specify roof Maintains status quo re. 3 roof truss truss spacing equal roof and floor assembly equal to floor member spacing while truss spacing recognizing that floor member spacing must be the same as in the actual home 13.3.2. Loading T Add 0.35 kPa Where there is limited 5 ceiling load attic access, NBC Article 9.4.2.4. requires ceiling joists and truss bottom chords to be designed for 0.35 kPa specified load (dead + live), in part to recognize insulation loads. Note E Add note. An explanation for using Needs 0.5 kPa floor loading discussion should be provided 13.4 Acceptance criteria E Clausified to make the two criteria easier to read.

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 56 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision T/E Reference The proposed general the reference to the NBC deflections in replaces the equivalent the NBC as criteria in clause 6.4. well as the exceptions in Clause 6.4

14 Deformation resistance test No proposed changes 15 Airtightness test for supply air duct systems (heading) E “test for’” To clarify that the added to provision describes the heading test. All E All provisions To avoid duplication of moved provisions in the different without parts of the Series change from Z240.9.1 clause 8 except as noted below. 15.1 Compliance (heading) E Heading To make finding added requirements easier

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 57 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision E Provision also appears in Z240.5.1 clause 8.1.4 with the additional criteria “when the casing outlets are sealed. 15.2 Testing 15.2.1 Apparat E/T Need Identification of us discussion Apparatus options is inconsistent with description of use in Procedure: - use of incline gauge is not identified in the Procedure - Apparatus identifies static probe OR water manometer while procedure calls for use of both in Clause 15.2.2. (b) 15.2.1 Apparat E Move To provide all apparatus and us calibration criteria together. 15.2.2 criteria from Procedu Clause re 15.2.2. 15.2.2 Procedu E 1. Text Duplicates detail provided re deleted in Clause 15.2.1 or from criteria moved to Clause Clause (b) 15.2.1. Equivalents apply in all cases.

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 58 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision E/T 2. Refer to It is not clear what devise devices is being referred to. identified in Identifying the devises Clause specified in Clause 15.2.1(b) 15.2.1(b) is consistent with the Figure. 16 Marking and set-up Instructions No proposed changes Tables Table 1 Minimum E Delete Addressed by general lumber reference to NBC. grades Exception is provided in for Clause 5.1.1. specific end uses Table 1 Connectio No change n of floor to support frame Table 3 Size and E Delete Addressed by general spacing reference to NBC. of studs Exception is provided in Clause 6.7.1.1.

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 59 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision Table 4 Wood T Delete In NBC. lintel See “Z240 – Implications spans of Major Proposed Changes” Table 5 Nailing E/T Delete In NBC and as provided in for wood Clause 6.7. framing See “Z240 – Implications of Major Proposed Changes” regarding nailing for resistance to higher lateral loads Table 6 Minimum T Delete In NBC. thermal See to “Z240 – resistanc Implications of Major e of Proposed Changes” insulation Table 2 Minimum No change Needs discussion thickness of interior plywood finish Table 8 Minimum E Delete Addressed by general ceiling reference to NBC. heights

Table 9 Minimum E Delete Addressed by general door sizes reference to NBC. Figures

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 60 of 46 Support For Change Reason Edit’l Provisio Summary of Yes Must be provided or Reason Suggested solution n Change(s) with where support is Tech’l Yes comme No qualified or change is nt or not supported revision Figure Examples E Delete Addressed by standard 1 of referenced through NBC allowable lumber defects Figure Loading T Add attic load To recognize insulation 1 for floor loads assemblie s test Figure Static E No change Moved form Z240.9.1 2 pressure measured in the furnace casing Figure Static E No change Moved form Z240.9.1 3 pressure measured in the duct system

CSA Z240 MH – TC Review 6 January 2014 Z240.2.1 Page 61 of 46