Technical Statement
Scope of use
SUMNER is direct fix unless used as a cladding, in which case we supply our own proprietary cavity system (rigid backer and cavity battens).
a)
Up to 3 storeys, or 10m to top of chimney
b)
With floor plan area limited only by seismic and structural control
joints, and
c)
External walls that are vertical, and roofs that are 60º or less
above the horizontal, and
d)
Buildings that require specific design input must have framing
stiffness equal to the framing provisions of NZS 3604, and
Timber
frame constructions complying with the NZBC, and
Steel
frame constructions must be to a specific design meeting the
requirements of the
NASH 3405, and
Masonry
constructions complying with NZS3604:2011, and
Suitable
for residential and commercial applications, in locations where the
maximum wind zone is determined to be less than or equal to very
high (50m/s).
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 B1.3.2, B1.3.3, B1.3.3(a), B1.3.3(f)
- Clause B2 Durability: Performance B2.3.1(a), B2.3.1(b), B2.3.1(c)
- Clause E2 External moisture: Performance E2.3.2
- Clause F2 Hazardous building materials: Performance F2.3.1
Evidence
The product meets the requirements set out in the following documents, or relevant parts of cited standards within the documents:
SUMNER Board complies with AS/NZS 2908.2:2000, and
NZBC clause B1
Supporting evidence
The product has and can make available the following additional evidence to support the above statements:
Product Criteria
Design requirements
Used for cladding of steel, timber frame and masonry buildings, with wind speed up to 50 m/s (Very High). Use our Codemark for ease of compliance.
Unlimited use any landscaping application
Installation requirements
The
SUMNER System must only be installed on vertical surfaces in
accordance with the Technical Literature.
Wind Zone
Suitable
for locations where the maximum wind zone is determined to be less
than or equal to very high (50m/s),
or where specific design is employed.
Where
SUMNER Schist cladding system is to be used for High-wind zones a
Rigid Air Barrier compliant with NZBC must be employed.
SUMNER
has also been appraised for weather tightness and structural wind
loading when used for timber or steel framed buildings subject to
specific design up to a design differential ultimate limit state
(ULS) wind pressure of 2500Pa.
Maximum Height
Three stories
buildings, and chimneys no higher than 10 meters above ground level.
