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
18
STEP 2        SELECT THE PATIO TYPE
Limits for Using Type 1P Awning Classification
Following are the dimensional requirements for using Type 1 awning classification, which has 1 partial wall.
• 
For awning dimensions, refer to figure 1.
• 
Awning is to be attached one side only to an existing building.
• 
Awning pitch “α” is to be between 1˚ and 10˚.
• 
Slope of the awning is to be normal to the attached wall.
• 
Minimum hc = 0.05 x d
• 
Maximum hc = 1.0 x d
• 
Maximum hc/wc to be as per Table 1.
• 
Maximum blockage under the roof parallel to the attached wall is to be 56% of the projected area.
• 
Awnings attached one side that do not comply with the above are to be classified as Type 1.
The engineering must allow for all conditions of usages, therfore a standard awning could be used for a carport or patio.
In the case of a carport it is possible to have one side blocked more than considered an open side by a car, caravan, 
camper van, boat etc and so for general awnings/carports the given wind pressure should be used and a type 1 should 
be considered.
In the case where the awning is usually at the rear of the property where it cannot be accessed by large vehicles that could 
block off one side the wind pressures experienced would be lower so a type 1P is allowed for in this situation.
It should be noted that any building in or blocking of the 3 open sides could be considered to require the use of the type 1 
engineering.
Typically a type 1 would be used for a garage, and type 1P would be considered for a backyard lifestyle awning (providing 
the requirements are followed for this type).
Table 1
Dimensional limits for Cp,n=0.5
hc/h
Max. hc/wc
hc/h
Max. hc/wc
<0.4
Not Allowed
0.75 to 0.8
0.71
0.4 to 0.5
No limits
0.8 to 0.9
0.45
0.5 to 0.75
1.0
0.9 to 1.0
0.33
DefinItion of Type 1P Awning

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