30mm & 40mm RESIDENTIAL ROOF PURLINS

30mm & 40mm
RESIDENTIAL
ROOF PURLINS
Battens for Roof and Wall Claddings
30x74x0.75 Top Hat Section
Propriatary steel roofings with wind loads
Or 0.25 LL whichever worst case Table of max span vs spacings
Pressure Factor Cp = + or - 0.9
For connections to wood subsrate Section Spacings
Refer NZS3604:2011 for wind loadings. (mm)
For connections to min 0.75 ga steel 600 600 Connect with min 1-10 gauge screw Max Span Max UDL for up to 0.50 kN/m, 2 per 1.0kN/m, (m) (kN/m) 3 per 1.5kN/m, and 4 per 2.0kN/m
Medium wind 37m/s 1.2 0.44 High wind 44m/s 1.2 0.63 Very high wind 50m/s 1.1 0.81 Extra high wind 55m/s 1.0 0.98 900 Max Span (m) 900 Max UDL (kN/m) 1200 Max Span (m) 1200
Max UDL
(kN/m)
1.1 1.0 0.9 0.9 0.66 0.95 1.22 1.47 1.0 0.9 0.8 0.8 0.88
1.26
1.62
1.96
NOTE All fixing types are determined as required for the higher uplift loads at the periphery of the roof (based on local pressure factors in AS/NZS 1170.2).
Battens for Roof and Wall Claddings
40x74x0.75 Top Hat Section
Propriatary steel roofings with wind loads
Or snow loads as noted
Table of max span vs spacings
Pressure Factor Cp = + or - 0.9
For connections to wood subsrate Profile 40x36x95 by steel gauge noted
Refer NZS3604:2011 for wind loadings. 7575 951.15
For connections to min 0.75 ga steel Maximum centres spacing
Connect with min 1-10 gauge screw 600 900
900
900
for up to 0.50 kN/m, 2 per 1.0kN/m, Maximum Span of Purlin between supports
3 per 1.5kN/m, and 4 per 2.0kN/m
Medium wind 37m/s 1.2 1.2 1.2 1.2
High wind 44m/s 1.2 1.2 1.2 1.2
Very high wind 50m/s 1.2 1.2 1.2 1.2
Extra high wind 55m/s 1.2 x
1.2 1.2
Snow, Regions (N2,N3,N4,N5)<150m 1.2 1.2 1.2 1.2
Snow, Regions N2>200m 1.2 1.2 1.2 1.2
Snow, Alpine Regions > 900m 1.2 x
1.2 1.2
NOTE EX LIGHT GAUGE STEEL COLD ROLLED SECTIONS AS PURLINS
40 TOP HAT AS SUPPLIED BY ROLLFORMING SERVICES
SPAN PURLIN CONTINUOUS OVER MINIMUM TWO SUPPORTS
Rollforming Services have unsurpassed knowledge and
passion for producing roll formed steel profiles. Set up
in 1996 as a contract roll forming company with the
technical design and build backing of Howick Ltd, one
of New Zealands most innovative roll forming machine
producers. We continue to provide fast, friendly service
to all our customers.
16B Ormiston Road, East Tamaki, Auckland.
Phone 09 271 6834 Fax 09 271 6835
Email sales@rollforming.co.nz
ROLLFORMING SERVICES ALSO SUPPLY
Speedfloor: Concrete flooring system
Steel Joist, Truss, Framing and Battens: For commercial and
domestic use
Tophat Purlins: Used in light gauge commercial steel buildings
Custom Profiles: For all steel fabrication uses including and
not limited too HVAC, Truck bodies, Fencing, Roller/Sliding/Tilt/
Sectional doors, Packaging, Roading and Agriculture.
www.rollforming.co.nz