Technical Statement
Scope of use
Strandsarking is suitable to be used in residential, commercial and industrial roofing applications with a minimum roof pitch of 2 degrees. Can be used with roofing materials weighing up to 150 kg/m².Is nominally 16.3mm thick and has a textured surface to provide a more slip resistant surface than is available with smooth sanded panel products.
New Zealand Building Code (NZBC)
The product will, if employed in accordance with the supplier's installation and maintenance requirements, assist with meeting the following provisions of the building code:
- Clause B1 Structure: Performance B1.3.1, B1.3.2, B1.3.3(a), B1.3.3(b), B1.3.3(c), B1.3.3(g), B1.3.3(h), B1.3.3(q), B1.3.4
- Clause B2 Durability: Performance B2.3.1(b)
- Clause F2 Hazardous building materials: Performance F2.3.1
Supporting evidence
The product has and can make available the following additional evidence to support the above statements:
Use in Service History
Strandsarking has been distributed by Laminex New Zealand since 2012.
Product Criteria
Design requirements
The design has been carried out using loads derived from NZS 3604 with the use of design combination factors as specified in AS/NZS 1170 and deflection limits as suggested in AS/NZS 1170.However, it is expected that Strandsarking could deflect up to 10mm under a maintenance foot fall point load, particularly where roof framing supports are at 900mm centres. If this is of concern,scaffold planks, or similar, can be used to span across roof framing members whilst working on the roof.
The panel and fixing designs have been carried out to the New Zealand timber code NZS 3603.
The design has been carried out on the basis that the maximum temperature and humidity in the roof space is 66ºC and 80%RH sustained for up to 24 hours. Further testing on the panel will be required should these values be exceeded.
The characteristic panel strength and stiffness values, as shown below, were derived from tests carried out at the conditions described in 9c above, but otherwise in accordance with AS/NZS4063.
Characteristic strength 23.9 MPa
Characteristic stiffness 4150 MPa
Note: The characteristic strength was derived from the 5th percentile value and the characteristic stiffness from the mean value, as defined in AS/NZS 4063.
Installation requirements
Please refer to the Strandsarking Technical brochure for full installation requirements.
Maintenance requirements
When Strandsarking is handled, installed and maintained in accordance with this literature it will meet the provisions of Clause B2 Durability (B2.3.1(b) and as such is expected to have a serviceable life of at least 15 years.
Please refer to the Strandsarking Technical brochure for full maintenance requirements.
Warrantees
When Strandsarking is handled, installed and maintained in accordance with this literature it will meet the provisions of Clause B2 Durability (B2.3.1(b) and as such is expected to have a serviceable life of at least 15 years.
Environmental
Strandsarking is declared as Red List Free in the Declare Products Database. This is a globally recognized nutrition label for the building products industry, formed as part of the Living Building Challenge. Red List Free products have all ingredients disclosed in the Declare database and none of those ingredients appear on the Living Building Challenge Red List.
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