Use Cyclone Plate and Neo Washer on each fixing.
Upon Installation the overlap needs to be stitch screwed or riveted every 300mm.
Single Spans (mm)
Wind 
Category
Panel 
Thickness
3 Sides 
Open
2 Sides 
Open
1 Side 
Open
Fully 
Enclosed
N2 
(W33)
75
7380
5630
4190
5250
100
7500
68860
4900
6330
150
9000
7780
5740
7230
N3 
(W41)
75
5270
4070
3060
3810
100
6360
4740
3430
4390
150
7270
5570
4150
5190
N4
(W50)
75
3960
3080
2330
2880
100
4590
3450
2510
3200
150
5410
4170
3130
3900
DeltaCorroCorro-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
DeltaCorroCorro-TPC Fixing Details
Crest fixing only. One fixing every second crest
Panel 
Thickness 
(mm)
Fixing into Steel
Fixing into Timber
75
Tek 14 x 115 Hex Head Screw T17 14 x 125 Hex Head Screw
100
Tek 14 x 135 Hex Head Screw T17 14 x 150 Hex Head Screw
125
Tek 14 x 150 Hex Head Screw T17 14 x 175 Hex Head Screw
150
Tek 14 x 175 Hex Head Screw T17 14 x 200 Hex Head Screw
175
Tek 14 x 200 Hex Head Screw T17 14 x 230 Hex Head Screw
200
Tek 14 x 230 Hex Head Screw T17 14 x 265 Hex Head Screw
225
Tek 14 x 260 Hex Head Screw T17 14 x 265 Hex Head Screw
250
Tek 14 x 300 Hex Head Screw T17 14 x 300 Hex Head Screw
DeltaCorroCorro-TPC
DeltaCorroCorro-TPC
Detail B
SPECIFICATIONS
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
DeltaCorroCorro-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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