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HVAC Ductwork Inspection & Test Plan

ITP for sheet metal and flexible ductwork installation covering duct fabrication, support spacing, joint sealing, insulation and air leakage testing per AS 4254.

13 checklist items
3 hold points
1 witness points
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Checklist Preview

Duct Fabrication & Materials

Requires sign-off
P/F
Sheet metal gauge per duct size and pressure class
P/F
Duct dimensions per mechanical drawings
P/F
Stiffener and reinforcement spacing compliant
P/F
Flexible duct lengths within maximum limits

Installation

Requires sign-off
P/F
Hanger and support spacing per AS 4254
P/F
Duct joints sealed to specified leakage class
Hold
P/F
Fire and smoke dampers at rated boundaries
Hold
P/F
Access doors provided for dampers and cleaning
P/F
Duct routing maintains service clearances

Insulation & Testing

Requires sign-off
P/F
Insulation R-value per NCC Section J
P/F
Vapour barrier intact and joints sealed
P/F
Air leakage test within class limits
Hold Witness
P/F
Internal duct cleanliness verified

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