requirements of ASTM E 72. The clip-to-substrate fastener selection shall
incorporate a safety factor of 3.0 based on ultimate pull-out strength.
Selection must consider the pry effect which the outstanding leg of clip
exerts on the fastener. End-laps shall be designed for thermal movement.
Concealed anchor clips shall be used.
1.3.3
Provisions for Expansion
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NOTE: Select appropriate temperature range based on
effects of direct sun and general climatic
conditions of the project site.
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Copper roof panels shall be free to move in response to the expansion and
contraction forces resulting from a total [110] [_____] degrees C [200]
[_____] degrees F temperature range during the life of the structure.
1.4
QUALIFICATIONS
1.4.1
Manufacturer
Copper roof system shall be the product of a recognized copper roof system
manufacturer who has been in the practice of manufacturing copper roof
systems for a period of not less than [10] [_____] years and has been
involved in at least 5 projects similar in size and complexity to this
project.
1.4.2
Installer
The installer shall be skilled in the installation of the type of copper
roof system required for this project, shall have a minimum of [10] [_____]
years of experience, and shall have been involved in installing at least 3
projects that are of comparable size, scope and complexity as this project
for the particular roof system furnished.
1.4.3
Manufacturer's Representative
A representative of the copper roof system manufacturer, who is familiar
with the design of the roof system supplied and experienced in the erection
of roof systems similar in size to the one required under this contract,
shall be present at the project site during installation of the copper roof
to ensure that the roof system meets the contract requirements.
1.5
MOCK-UPS
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NOTE: Complexity of work and scope of quality
control should be carefully evaluated before
requiring contractor to construct a mock-up. Delete
paragraph if mock-up is not required.
**************************************************************************
Before proceeding with final purchase of materials and fabrication of
copper roofing components, a mock-up of the work shall be constructed at
the site. Roof mock-up shall be constructed in the size and location
directed, and shall include at least one example of each critical detail
(ridge, hip, valley, etc.) included in the project. The approved mock-up
will establish the minimum standard of quality required for copper roofing
SECTION 07610
Page 7
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