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2021 – March

The addition of an interactive calculator for asymmetrical valleys constitutes the most important inclusion in this update.

The other capacity calculators have all been refined and positioned for improved usability.

Capacity Calculators

Gutter CapacityGutter Capacity Calculations
Valley Capacity (both symmetrical and asymmetrical)Valley Capacity Calculator
Downpipe CapacityDownpipe Capacity Calculator
Maximum Area Above SpreadersMaximum Area Above Spreader Calculator
Maximum Area Above PenetrationsMaximum Area Above Penetration Calculator
Maximum RunMaximum Run Calculator
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In addition, various drawings have been updated for accuracy and correctness.

The rest of this update consisted of fixing minor errors and improvements for clarity.

 

Revision Detail - 2021 - March

CategoryClause Number (at time of update)Clause (As of current publication)Details
2 - Editing and rearrangement1Introduction Update Revisions Message
1 - Minor Errata2.1Definitions Added definitions for Translucent, Transparent, Opalescent, and Opaque.
1 - Minor Errata3.13Material Grade Minor revision for Aluminium.
0 - Clause Removed4.8Biological CorrosionClause removed. Lichen is now in Paint Durability, and Gutter Leaf Guard is now in Other Causes of Corrosion.
2 - Editing and rearrangement5.3.7Valley Capacity Calculator Updated calculator to support Asymmetrical Valley calculations, including dynamic illustration.
2 - Editing and rearrangement5.5.2Maximum Area Above Spreader Calculator Clause edited, new clause (Downpipe Spreaders) introduced with explanatory text about spreaders. Trapezoidal illustration updated to show effective pan-depth area.
2 - Editing and rearrangement5.6Gutter Capacity Design Clause renamed and moved to Types of Gutter.  
1 - Minor Errata5.6.2Gutter Support Systems Clause moved to Gutter Installation and Maintenance.
2 - Editing and rearrangement5.6.3Gutter Installation Clause renamed and moved to Pre-empting Problems.
2 - Editing and rearrangement5.7.1Downpipe Spreaders Previously removed clause, now reinstated and updated to align with the new Maximum Area Above Spreader Calculator.
1 - Minor Errata5.7.2Gutter Fall Clause moved to Gutter Installation and Maintenance.
2 - Editing and rearrangement5.7.5Downpipe Capacity Calculator Illustration updated to show effective head.
2 - Editing and rearrangement5.8Gutter Capacity Calculator Rectangular Gutter illustration updated to show effective gutter area. Clause renamed to refine search results.
0 - Clause Removed6.2Acceptable Solution NZBC E2/AS1Clause removed as it pertains to E2, which is discussed in NZBC Clause E2 External Moisture (Extract).
2 - Editing and rearrangement6.2.1Compliance Clause promoted, replacing ES/AS1 at postion 6.2, and content of clause reviewed.
2 - Editing and rearrangement7.1.4Maximum Run Calculator Trapezoidal illustration updated to show effective pan-depth area.
2 - Editing and rearrangement7.4End Laps Drawing deleted, replaced with a reference to Sealing End Laps.
2 - Editing and rearrangement8.7Profile Closures Clause revised. Recommendations have not changed. Drawings replaced with more accurate depictions.
2 - Editing and rearrangement9.4.4Maximum Area Above Penetration Calculator Trapezoidal illustration updated to show effective pan-depth area.
2 - Editing and rearrangement14.11.1Sealing End Laps Drawing replaced with with more accurate depiction of correctly and incorrectly sealed end laps.
1 - Minor Errata15.4.4.2Substrate Removed empty link.
4 - Clause Inserted 2021 – March New Revision clause.
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Clause: 
019_012_000_000_000_000_000_000_000
Clause Number: 
19.12
/cop/revision-history/2021-march
Revision Category: 
4 - Clause Inserted
Revision Detail: 

New Revision clause.