DeltaTrimCorro-TPC Acoustic Values
Frequency
75mm
150mm
100
15.41
15.00
160
16.40
15.09
200
18.81
17.70
250
19.70
18.51
315
21.39
19.40
400
22.31
19.69
630
23.40
19.10
800
23.69
17.31
1000
25.61
18.29
1250
21.01
30.10
1600
20.00
36.19
2000
34.79
37.30
2500
41.70
37.09
3150
44.10
35.69
5000
44.61
39.90
STC
24.00
23.00
RW
25.00
24.00
DeltaTrimCorro-TPC Fixing Details
Crest fixing only. One fixing every second crest
Panel 
Thickness 
(mm)
Fixing into Steel
Fixing into Timber
75
Tek 14 x 175 Hex Head Screw
T17 14 x 175 Hex Head Screw
100
Tek 14 x 200 Hex Head Screw
T17 14 x 150 Hex Head Screw
125
Tek 14 x 230 Hex Head Screw
T17 14 x 230 Hex Head Screw
150
Tek 14 x 260 Hex Head Screw
T17 14 x 265 Hex Head Screw
175
Tek 14 x 300 Hex Head Screw
T17 14 x 300 Hex Head Screw
200
Tek 14 x 300 Hex Head Screw
T17 14 x 300 Hex Head Screw
DeltaTrimCorro-TPC
DeltaTrimCorro-TPC
SPECIFICATIONS
Detail B
Detail A
Early Fire Hazard Properties AS 1530.3:1999
AWTA Test Report 23-000591 20-02-2023
Index
Test Range
External 
Top Skin
Ignitability
0-20
0
Spread of Flame
0-10
0
Heat Evolved
0-10
0
Smoke Developed
0-10
1
Use Cyclone Plate and Neo Washer on each fixing.
Upon Installation the overlap needs to be stitch screwed or riveted every 300mm.
As at the stated Version Date all of the information contained 
in this document is correct. Please check on our WebPage 
to ensure that you’re referencing the current version. 
Delta Panels Pty Ltd - ABN: 11 147 861 292
E: info@deltapanels.com   
W: www.deltapanels.com    
Head Office: 731 Boundary Road, Richlands, Qld 4077    P: +61 7 3271 2170    
Sydney Depot: 11 The Old Northern Road, Narellan, NSW 2567   P: +61 2 4611 7712      
Version Date: 2025-11-28
Acoustic Performance
Acoustic testing has been performed on TPC panels in compliance 
with the requirements of AS 1191-2002 “Acoustics - Method 
for Laboratory Measurement of Airborne Sound Insulation of 
Building Elements”.
The procedures specified by AS/NZS ISO 717.1:2024 were 
used to calculate the Sound Transmission Class (STC) and the 
Weighted Sound Reduction Index Rw = 25 dB.
Trafficable Status
DeltaTrimCorro-TPC is classified as trafficable when used for 
maintenance purposes. The following recommendations should 
be observed at all times.
•   Wear flat, rubber soled shoes
•   Walk over the roof supporting beams
•   Spread your weight over as many roof crests as possible
•  Crawl boards should be used when accessing areas not  
     supported by a structure

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