Performance Requirements -74120007

the second sentence.

For design-bid-build projects, delete the first

bracketed sentence. Include the second bracketed

option in the second sentence. Determine the

required wind uplift resistance based on ASCE 7 wind

loading calculations or applicable building code

requirements. Insert calculated loads in the

bracketed spaces provided or on roof plan drawings.

Incorporate the following safety factors in

calculating loads to be resisted:

Structure:

2

Single fasteners:

3

Two or more fasteners:

2.25

For all projects, on drawings indicate the boundary

dimensions, or zones, for perimeter, corner, and

ridge areas where higher wind loads apply.

Where non-rated systems may be permissible, include

the bracketed option at the end of the paragraph.

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[The required uplift resistance of the roof assembly shall be calculated in

accordance with [ASCE 7][_____ Building Code requirements]. Metal roof

panel assembly shall resist [the calculated loads incorporating appropriate

safety factors and including increased loads in perimeter and corner

areas.][the following wind loads as determined by [ASCE 7] [_____Building

Code] with a factor of safety appropriate for the material holding the

anchor:

Negative

Positive

[_____kg/m2 (

a.

At eaves

psf)]

[_____kg/m2 (

b.

At rakes

psf)]

[_____kg/m2 (

c.

At ridge

psf)]

[_____kg/m2 (

d.

At building corners

psf)]

[_____kg/m2 (

e.

At central areas

psf)]

psf)]]

The roof assembly shall be tested in accordance with [ASTM E 1592][UL 580]

to resist the [calculated][specified][indicated] loads. Non-tested

assemblies shall not be installed[, except as approved by the Contracting

Officer. Provide wind load calculations and submit engineering

calculations and substantiating data to validate wind resistance of any

non-tested assembly].]

1.2.2.1

Performance Requirements

The installed roof assembly shall be watertight, conform to the roof slope,

and resist the uplift pressures [calculated][specified][indicated]. The

Contractor shall furnish a commercially available roofing system which

satisfies all specified requirements.

SECTION 07412

Page 7