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Factory mutual design pressure (psf) – Dow INSTA STIK User Manual

Page 3

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Exposure B

Class 1-90 Rated Systems

Enclosed Building

h

60'

h/w

1 for 60'

q

10°

FACTORY MUTUAL DESIGN PRESSURE (PSF)

Mean
Roof

Basic Wind Speed, V (mph) Based on ASCE 7-98 (3-second gust)

Height

h (ft)

<85

90

100

110

120

130

140

145

150

160

170

185

Zone 1 (Field of roof)

15

15.0

17.0

21.0

25.0

30.0

35.0

41.0

43.0

47.0

53.0

60.0

71.0

30

15.0

17.0

21.0

25.0

30.0

35.0

41.0

43.0

47.0

53.0

60.0

71.0

60

18.0

20.0

25.0

31.0

36.0

43.0

49.0

53.0

57.0

65.0

73.0

86.0

89

20.0

23.0

28.0

34.0

41.0

48.0

55.0

60.0

64.0

72.0

82.0

97.0

Zone 2 (Perimeter of roof)

15

25.2

28.6

35.3

42.0

50.4

58.8

68.9

72.2

79.0

89.0

100.8

119.3

30

25.2

28.6

35.3

42.0

50.4

58.8

68.9

72.2

79.0

89.0

100.8

119.3

60

30.2

33.6

42.0

52.1

60.5

72.2

82.3

89.0

95.8

109.2

122.6

144.5

89

33.6

38.6

47.0

57.1

68.9

80.6

92.4

100.8

107.5

121.0

137.8

163.0

Zone 3 (Corner of roof)

15

38.0

43.0

53.1

63.3

75.9

88.5

103.7

108.8

118.9

134.1

151.8

179.6

30

38.0

43.0

53.1

63.3

75.9

88.5

103.7

108.8

118.9

134.1

151.8

179.6

60

45.5

50.6

63.3

78.4

91.1

108.8

124.0

134.1

144.2

164.4

184.7

217.6

89

50.6

58.2

70.8

86.0

103.7

121.4

139.1

151.8

161.9

182.2

207.5

245.4

6"

6"

12"

12"

12"

6"

9"

9"

9"

9"

6"

3"

6"

6"

6"

6"

6"

6"

6"

3"

Light Gray Areas (<45 psf):
Standard application rate – Place the first bead of INSTA STIK

Quik Set 6"

(15 cm) inside the outside edge of the 4' (1.2 m) wide insulation board to be
attached. Apply three additional parallel beads approximately 12" (30 cm) apart so
that the fourth bead is 6" (15 cm) inside the opposite edge of the insulation board.

Dark Blue Areas (<67.5 psf):
Standard application rate – Place the first bead of INSTA STIK

Quik Set 6"

(15 cm) inside the outside edge of the 4' (1.2 m) wide insulation board to be
attached. Apply four additional parallel beads approximately 9" (23 cm) apart so
that the fifth bead is 6" (15 cm) inside the opposite edge of the insulation board.

Light Blue Areas (<90 psf):
Standard application rate – Place the first bead of INSTA STIK

Quik Set 3"

(8 cm) inside the outside edge of the 4' (1.2 m) wide insulation board to be
attached. Apply seven additional parallel beads approximately 6" (15 cm) apart so
that the eighth bead is 3" (8 cm) inside the opposite edge of the insulation board.

Dark Gray Areas:
NOT APPLICABLE (>90 psf); will not meet Class 1-90.

Note - Please check with Dow to verify if your roofing system configuration has been tested by Factory Mutual (FM).

®™Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow

I N S T A L L A T I O N

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C O M M E R C I A L

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