E: info@deltapanels.com      Head Office: 731 Boundary Road, Richlands, Qld 4077    +61 7 3271 2170
 W: www.deltapanels.com     Sydney Depot:  11 The Old Northern Road, Narellan, NSW 2567   +61 2 4611 7712
ABN: 11 147 861 292
Version Date: 
2025-11-25
20
STEP 3        SELECT THE STYLE OF ROOF SHEETING
Step 3.1       Single Skin - Spans
DeltaSingleTM
1.  Minimum roofing slope to be 1˚. 
2.  The minimum fixing requirements are 3/14g screws with cyclonic washers per sheet per support. 
3.  Allowable deflection limit for wind loading is span / 50. 
4.  Maintenance load of 0.5kN has been allowed for. 
5.  DeltaSingleTM is classified as a non-trafficable roof. 
6.  Maximum allowable overhang of sheeting is 30% of the adjacent span or 900mm, whichever is lesser. 
7.  ‘Roof Span’ is the maximum spacing of supports for sheeting.
ALLOWABLE SPAN (MM) FOR 0.48 BMT DELTA SHEETING IN NON-CYCLONIC REGIONS
Wind Class
Single-Span
Multi-Span
Cp,n
Cp,n
0.5
0.7
1
1.2
0.5
0.7
1
1.2
Patio Type
1P
1
2+4
3
1P
1
2+4
3
N1
5340
5130
4550
4280
6330
5820
4820
4370
N2
5240
4910
4060
3650
5850
4900
4050
3650
N3
4630
3850
3130
2820
4620
3850
3130
2820
N4
3720
3060
2500
2250
3710
3060
2490
2250
N5
2970
2460
2010
1830
2970
2450
2010
1830
Figure 2 - Sheeting Profile
Figure A3
300 COVER
Material:
G550 0.48 BMT steel to AS 1397
49

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