NRG Greenboard Fixing Test Report

 

 

NRG Greenboard™
Cladding Fixing Requirements
TESTING REPORT
COMPILED FOR
NRG BUILDING SYSTEMS
BY SUMMERMORE PTY LTD
04TH

DECEMBER 2010

1.0 Introduction:

The aim of this report is to investigate the behaviour of the NRG Greenboard Cladding Fixing and assess the fixing centres for timber framing.

1.1 Objectives:

The focus is primarily on determining the connection capacity for wall cladding. The findings are used to recommend fixing spacings.

1.2 Format:

Section Two presents a brief description of the test samples, the layout of the testing station and the test method. A brief synopsis of the test results is presented.

The detailed analysis of the test results is presented in Section Three.

2.0 Panel Test Method:

Ten samples were delivered to Summermore Pty Ltd. The samples were connected to the test rig at the testing station. They were identified as Sample Numbers 1—6.

2.1 Selection of Materials

Summermore Pty Ltd had no input into the selection of materials used to manufacture the sample. NRG Building Systems manufactured the samples with no preference to sampling materials.

The samples were then transported The University of Southern Queensland—Toowoomba Campus and the samples were intact on delivery.

2.2 Test Method

The test rig used is shown below.

2.2.1 Test Method

The samples were tested by placing them into the testing machine. The samples were loaded until failure and logged with an electronic data collection system.

All of the samples were noted to fail with fastener withdrawal through the panel being the mode of failure.

3.0 Detailed Analysis:

50mm Samples

3.1 Assembly Description

The sample material is 50mm thick expanded polystyrene.  The samples were all 300mm x 300mm.

3.1.1 Summary of Test Results

The mean ultimate load reached for the samples was 345N as determined by the failure of the EPS. The standard deviation of the samples was 17N with a coefficient of variation of 5% giving kt=1.15 and a capacity of 345/1.15=300N.

75mm Samples

3.1 Assembly Description

The sample material is 75mm thick expanded polystyrene.  The samples were all 300mm x 300mm.

3.1.1 Summary of Test Results 

The mean ultimate load reached for the samples was 467N as determined by the failure of the EPS. The standard deviation of the samples was 31N with a coefficient of variation of 6.7% giving kt=1.21 and a capacity of 467/1.21=385N.

4.0 Discussion of Results: 

The test results were treated statistically to provide fixing spacings for the NRG Greenboard Cladding.

The results of the analysis have been used to provide a table of fixing spacings for the NRG Greenboard Cladding for the various wind classifications.

4.1 Determination of Load Capacity

The fixing spacings were determined by using the mean value for ultimate failue factored by kt to account for testing variation. The resulting load was used to determine the fixing spacings based on stud centres of 450mm .

The Table below is taken from AS4055—Wind Loads for Housing.

For example, in a C3 wind classification using 75mm NRG Greenboard™ Cladding, P=385N. Stud Spacing= 450mm, qu=ρair/2*V5002*Fc2*Cpn=0.6*742*1.052*1.35=4890N/m2. Now, 385/4890/0.45=0.175, so the maximum spacing is 175mm.

NRG Greenboard Cladding Fixing Requirements
50mm NRG Greenboard Cladding 50mm NRG Greenboard Cladding 
Wind Classification Stud
Spacing
(mm)
Fastener Spacing
Vertically (mm)
Wind Classification Stud Spacing
(mm)
FastenerSpacing
Vertically
(mm)
N1 450 300 N1 450 300
N2 450 300 N2 450 300
N3 450 300 N3 450 300
N4 450 300 N4 450 300
N5 450 300 N5 450 275
C1 450 300 C1 450 300
C2 450 300 C2 450 250
C3 450 300 C3 450 175
C4 450 300 C4 450 115

NRG Greenboard Cladding Fixing Spacings

 5.0 Conclusion: 

The samples tested were found to be adequate for use as a wall cladding with fixing spacings as detailed in the enclosed table.

SCREW PULLOUT TEST REPORT
Test Method: Client Specified

Test Date: 03/12/2010                                                              Operator:
Operator: Wayne Crowell                                                          Wayne Crowell

Sample Information:  

(A) Client Name: Summermore Pty Ltd
(B) Address: P.O. Box 1671
(C) Address: Browns Plains BC
(D) Address: Qld 4118
(E) Attention: Ron Bell
(F) Phone: 07 38000973
(G) Fax: 07 38001860
(H) Client Job ID: Polystyrene Blocks – Screw Pull-Out Test
(I) STS Job Number: STS-10-258-P
(J) Specimen Orientation: Flatwise
(K) Sample Description: Foam Material (Approx. Density 20 kg/m³)
(L) Conditioning Temp. & RH: 23°C, 50% RH Constant for 24 Hours
(M) Test Room Temp. & RH: 20°C, 46% RH
(N) Test Speed (mm/min): 20
(O) Timber: MGP12 – 70 x 30

Test Equipment Details:

Test Machine: MTS Insight
Location: P9 110 Test Laboratory, Fibre Composites
Research Centre, USQ
Accuracy Grading: Grade A

Testing Officer:  W.Crowell

Disclaimer:
STS takes care in preparing the reports it provides to clients. However STS does not warrant that the information in this particular report will be free of errors or omissions or that it will be suitable for the client’s purposes. STS will not be responsible for the results of any actions taken by the client or any other person on the basis of the information contained in this report or any opinions expressed in it.

Specimen Results: 55mm Thick Samples

Specimen Results: 73mm Thick Samples

Specimen # Peak Load
 N
Failure Mode
1 480 Washer pull-thru foam
2 490 Washer pull-thru foam
3 432 Washer pull-thru foam
Mean 467
Std Dev 31

Photographs:

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