Design Conditions - 07611N0008

when required by the manufacturer to withstand the wind loads

specified.

d.

Roof panel anchor clips shall be concealed and designed to allow

for longitudinal thermal movement of the panels, except where

specific fixed points are indicated. Provide for lateral thermal

movement in panel configuration or with clips designed for lateral

and longitudinal movement.

1.3.2

Design Conditions

The system shall be designed to resist positive and negative loads

specified herein in accordance with the AISI SG-973. Panels shall support

walking loads without permanent distortion or telegraphing of the

structural supports.

1.3.2.1

Wind Uplift

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NOTE: Determine appropriate pressures that apply to

various portions of roof using MIL-HDBK 1002/2 for

structural design and wind load information. Use

criteria of local building code when their

provisions exceed NAVFAC/AF criteria. Insert

calculated pressures in table; regardless of

calculated value, use 2.25 kPa 45 psfminimum for

Class 90 systems.

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The design uplift pressures for the roof system shall be computed and

applied using a basic wind speed of [_____] kilometers per hour (km/h)

miles per hour (mph). Roof system and attachments shall resist the

following wind loads, in kilopascals (kPa) pounds per square foot (psf):

Negative

a.

At eaves

[_____]

b.

At rakes

[_____]

c.

At ridge

[_____]

d.

At building corners

[_____]

e.

At central areas

[_____]

The design uplift force for each connection assembly shall be that pressure

given for the area under consideration, multiplied by the tributary load

area of the connection assembly, and multiplied by the appropriate factor

of safety, as follows:

a.

Single fastener in a connection:

3.0

b.

Two or more fasteners in each connection:

2.25

1.3.2.2

Roof Live Loads

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NOTE: Refer to MIL-HDBK 1002/2 for additional

SECTION 07611N

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