Stratco Cooldek Roofing Guide

DESIGN
GUIDE
Cooldek Roofing
®
DOMESTIC PATIO APPLICATION

COMPLIANCE
The Wind Capacity Tables are based on testing in accordance with AS1562.1-1992 and AS4040.0, 1 & 2-1992. Span
tables have been developed by determining wind pressures in accordance with AS4055-2006 for domestic applications.
Capacity tables are in limit state format.
Material Properties Cooldek Classic Cooldek CGI
Base Metal
Thickness &
Material Grade
Top Skin 0.42mm/G550 0.42mm/G550
Bottom Skin 0.50mm/G300 0.50mm/G300
Mass (kg/linear
metre)
50mm Panel 9.5 9.6
75mm Panel 9.8 9.9
100mm Panel 10.1 10.2
Width Coverage (mm) 1000 1000
Minimum Roof Pitch 2° 3°
Core
Material SL Grade EPS (expanded polystyrene)
Thermal Conductivity 0.037 W/mK (0°C mean temp.)
Table 1
DESIGN CONSIDERATIONS
The minimum recommended roof pitch for “flat”
verandahs shall be 2° (1 in 30) for Cooldek Classic panels
and 3° (1 in 20) for Cooldek CGI panels. The maximum
roof pitch for “flat” verandahs shall be 5° (1 in 12). Care
must be taken to ensure the minimum roof pitch is
maintained to avoid ponding of rainwater.
The roof is designed to withstand actions incidental to
maintenance, roofs are not to be used for floor type
activities.
The design contained within these span tables relate to
wind classifications N1, N2, N3, and N4 applicable to
Regions A & B. Stratco does not accept liability for any
loss or damage suffered as a result of any errors in the
interpretation or application of these span tables.
MATERIAL SPECIFICATIONS
50mm Cooldek CGI Panel
50mm Cooldek Classic Panel
Both profiles are available in 50, 75 and 100mm insulation thickness
FORM AND FUNCTION
The innovative Cooldek®insulated panel provides a roof, insulation and ceiling like finish all in one product. With
superior spanning capabilities, two roof profiles and three insulation thicknesses to choose from, it is an ideal solution
for domestic patio roof applications.
Figure 1
SPANS
Spans given in table 2 are determined for wind speeds for
non-cyclonic areas. Indicated spans are suitable for ‘at’
roof patios. Open freestanding unit spans can be taken
from open three sides unless a wall, eaves or boundary
exists within 500mm of two or more sides.
For Cooldek roong in attached or freestanding domestic
gable patio application, sheet spans shall not exceed
those given for one or no open sides. Alternatively, table
3 indicating wind capacities may be used to determine
allowable single spans for any application.
Spans specied for units with three sides open are
suitable for units considered ‘empty under’ and not
exceeding 3 metres in height (from ground or deck
level). For units in which goods or materials stored under
the roof are expected to block greater than 50% of any
open side exposed to the wind spans are to be taken
from open two sides.
Forunitswithtwoopensides,spansarebasedonCp,n=-1.0
while for units with only one or no open sides, Cp,n=-1.2.
In all cases, relevant consideration has been given to
local pressure.
Note: Table 3 provides allowable wind capacities for
Cooldek in single span application for serviceability and
strength limit states. The pressures given may be used by a
suitably qualied engineer for any single span application
ensuring appropriate xing details are applied.
Figure 2
Single span
Back span Overhang

FIXING RECOMMENDATIONS
Cooldek roong should be laid into the prevailing wind and sit neatly on the preceding roof sheet. For Classic prole fasten
through each crest and for CGI prole fasten through every second crest. Use cyclone caps and neoprene washers in all crest
xings. Fix side laps with 12x20 hex head screws with neoprene washers at approximately 1000mm centres, refer below.
The values in all the above tables are for use with steel supports with a minimum thickness of 1.0mm BMT, G550, or timber supports with fixing details as
specified below.
SINGLE SPAN WIND CAPACITIES (kPa)
Table 3
Profile
Panel
Thickness
(mm)
Limit State
SPAN (mm)
1800 2400 3000 3600 4200 4800 5400 6000 6600 7200
Classic
50
Serviceability 3.80 2.69 2.06 1.66 1.38 1.18 1.02 - - -
Strength 6.70 4.50 3.30 2.56 2.07 1.72 1.46 - - -
75
Serviceability - 4.86 3.43 2.58 2.02 1.64 1.37 1.16 1.00 -
Strength - 5.11 3.63 2.75 2.17 1.77 1.48 1.26 1.08 -
100
Serviceability - - 3.51 2.78 2.27 1.91 1.65 1.44 1.27 1.14
Strength - - 4.58 3.47 2.74 2.24 1.87 1.59 1.38 1.21
CGI
50
Serviceability 3.72 2.62 1.99 1.60 1.32 1.13 0.97 - - -
Strength 6.78 4.47 3.24 2.49 1.99 1.64 1.38 - - -
75
Serviceability - 3.81 2.86 2.27 1.86 1.57 1.35 1.18 1.04 -
Strength - 5.84 4.15 3.14 2.48 2.02 1.69 1.44 1.24 -
100
Serviceability - - 3.74 2.89 2.33 1.93 1.63 1.41 1.23 1.09
Strength - - 4.20 3.30 2.69 2.25 1.92 1.67 1.47 1.31
SINGLE SPANS - Domestic Patio Application
Maximum allowable 900mm deck overhang for 50 & 75mm panels and 1200mm for 100mm panels, except in wind classification N4 in which maximum allowable shall be
900mm. The cladding back span shall be no less than 1.5 times the deck overhang. If values are shown in brackets they represent the maximum allowable span if an overhang
is used. For a side to be considered open, the full length of the side must be open.
Table 2
COOLDEK CLASSIC COOLDEK CGI
Open Sides
Panel
Thickness
(mm)
N1 (W28) N2 (W33) N3 (W41) N4 (W50) Open Sides
Panel
Thickness
(mm)
N1 (W28) N2 (W33) N3 (W41) N4 (W50)
Three
50 5400 5400 5400 4200 (3900)
Three
50 5400 5400 5100 3900
75 6600 6600 6000 4800 (3900) 75 6600 6600 6000 4800 (3900)
100 7200 7200 6600 6000 100 7200 7200 6900 6000
Two
50 5400 5400 3900 3300 (3000)
Two
50 5400 5100 3600 3000
75 6600 5500 4800 3900 (3000) 75 6600 5700 4800 3900 (3000)
100 7200 6300 5400 4100 (3500) 100 7200 6600 5400 4100 (3500)
One/None
or
Gable Patio
50 5400 4500 3300 3000 (2000) One/None
or
Gable Patio
50 5400 4500 3300 3000 (2000)
75 6000 4800 3900 3300 (2100) 75 6300 5100 3900 3300 (2100)
100 6900 5400 4200 3600 (2400) 100 7200 5700 4200 3600 (2400)
Fastener Size Selection
Lapping
Fixing to Steel (minimum 1.0 BMT) Fixing to Timber
Cooldek Classic
Crest Fixing Only
One fixing
required per crest
Panel
Thickness
(mm)
Panel
Thickness
(mm)
50 14-10x125 hex head screw 50 14-10x125 Type 17 screw
75 14-10x150 hex head screw 75 14-10x150 Type 17 screw
100 14-10x175 hex head screw 100 14-10x175 Type 17 screw
Cooldek CGI
Crest Fixing Only
One fixing
required every
second crest
Panel
Thickness
(mm)
Panel
Thickness
(mm)
50 14-10x110 hex head screw 50 14-10x110 Type 17 screw
75 14-10x125 hex head screw 75 14-10x150 Type 17 screw
100 14-10x150 hex head screw 100 14-10x175 Type 17 screw
Table 4
Side lap
Screw
Slip joint
Screw
Slip joint
Side lap

COOLDEK CLASSIC
COOLDEK CGI
CONTACT
1300 165 165
www.stratco.com.au
All brands and logos/images accompanied by ® or ™ are
trade marks of Stratco (Australia) Pty Limited.
© Copyright May 2011
WALKING ON COOLDEK
MAINTENANCE
When walking on Cooldek roong, it is recommended you walk over the
support beam to avoid damage. Wear at, rubber soled shoes and walk
at footed in the sheet pans for Classic, and with your weight spread over
as many crests as possible for CGI. For carport and verandah applications,
away from supports, crawl boards should be used to avoid damage during
installation and maintenance.
The performance of Cooldek over time depends on its correct application
and maintenance. Maintenance should be performed as often as is required
to remove dirt, salt and pollutants.
Where used in severely corrosive environments, cleaning should be
performed more often.
It is important that screws have the same life expectancy as the cladding
you have specied.
Packs of Cooldek should always be kept dry and stored above ground level
while on site. If the sheets have become wet, they should be separated,
wiped and placed in the open to dry.
Refer to Stratco “Selection, Use and Maintenance” brochure, for more
detailed information about the correct use and maintenance of this product.