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MWFRS Wind Load Design for Low-Rise Buildings (Method 2) PER ASCE 7-05

 Job Information

Company Name

PE, INC

date

07/06/2009

Address :

PO BOX 13582

City :

MAUMELLE

State :

AR, 72113

Project No. :

LM BLADE STORAGE 2

Description :

44 METER BLADE

Designed By :

 

 Building Specifications

Basic Wind Speed (V)

90 mph

Structure Type

Building

Building Type

Enclosed

Structural Category

II

Exposure Category

C

Type of Roof

Gabled

Slope of Roof

2.1 : 12

Slope of Roof (Theta)

9.93 Degrees

Mean Roof Ht

28.62ft

Kh: 2.01*(Ht/Zg)^(2/Alpha)

0.97

Kht: Topographic Factor (Figure 6-4)

1

Qh: .00256*(V)^2*l*Kh*Kht*Kd

17.14psf

Roof Area

3654.71

Reduction Factor

0.8

Edge Strip (a)

6 ft

End Zone (2a)

12 ft

L

60 ft

B

60 ft

 

The equation for determination of design wind pressures for MWFRS for low-rise buildings is:

P = qh[(GCpf)-(GCpi)]

 

Basic Load Cases (BLC)

 

1. Transverse Direction

Surface Transverse Direction
  Perpendicular θ = 9.93 deg
  GCpf +GCpi -GCpi qh w/-GCpi (Suction) P (psf) w/+GCpi (Pressure) P (psf)
1 0.44 0.18 -0.18 17.14 0.62 10.67 0.26 4.50
2 -0.69 0.18 -0.18 17.14 -0.51 -8.74 -0.87 -14.91
3 -0.41 0.18 -0.18 17.14 -0.23 -3.88 -0.59 -10.05
4 -0.34 0.18 -0.18 17.14 -0.16 -2.67 -0.52 -8.84
5 -0.45 0.18 -0.18 17.14 -0.27 -4.63 -0.63 -10.80
6 -0.45 0.18 -0.18 17.14 -0.27 -4.63 -0.63 -10.80
1E 0.67 0.18 -0.18 17.14 0.85 14.61 0.49 8.44
2E -1.07 0.18 -0.18 17.14 -0.89 -15.26 -1.25 -21.43
3E -0.58 0.18 -0.18 17.14 -0.40 -6.90 -0.76 -13.07
4E -0.50 0.18 -0.18 17.14 -0.32 -5.47 -0.68 -11.64
1T           2.67   1.13
2T           -2.19   -3.73
3T           -0.97   -2.51
4T           -0.67   -2.21

 

 

Design Pressures for Transverse Direction with Positive Internal Pressure

[(GCpf)-(+GCpi)]

 

 

 

Design Pressures for Transverse Direction with Negative Internal Pressure

[(GCpf)-(-GCpi)]

 

Pressure & Suction Coef. for Transverse Direction with Positive Internal Pressure

Coef. =[(GCpf)-(+GCpi)]

 

Interior Zone (Zone 1, 2, 3, 4, 5 & 6)

 

End Zone (Zone 1E, 2E ,3E & 4E)

 

 

Pressure & Suction Coef. for Transverse Direction with Negative Internal Pressure

[(GCpf)-(-GCpi)]

Interior Zone (Zone 1, 2, 3, 4, 5 & 6)

End Zone (Zone 1E, 2E ,3E & 4E)

 

 

1. Longitudinal Direction

 Job Information

Company Name

PE, INC

date

07/06/2009

Address :

PO BOX 13582

City :

MAUMELLE

State :

AR, 72113

Project No. :

LM BLADE STORAGE 2

Description :

44 METER BLADE

Designed By :

 

 

 

 Building Specifications

Basic Wind Speed (V)

90 mph

Structure Type

Building

Building Type

Enclosed

Structural Category

II

Exposure Category

C

Type of Roof

Gabled

Slope of Roof

2.1 : 12

Slope of Roof (Theta)

9.93 Degrees

Mean Roof Ht

28.62ft

Kh: 2.01*(Ht/Zg)^(2/Alpha)

0.97

Kht: Topographic Factor (Figure 6-4)

1

Qh: .00256*(V)^2*l*Kh*Kht*Kd

17.14psf

Roof Area

3654.71

Reduction Factor

0.8

Edge Strip (a)

6 ft

End Zone (2a)

12 ft

L

60 ft

B

60 ft

 

The equation for determination of design wind pressures for MWFRS for low-rise buildings is:

 

P = qh[(GCpf)-(GCpi)]

 

Surface Longitudinal Direction
  Parallel θ = 0.0 deg
  GCpf +GCpi -GCpi qh w/-GCpi (Suction) P (psf) w/+GCpi (Pressure) P (psf)
1 0.40 0.18 -0.18 17.14 0.58 9.94 0.22 3.77
2 -0.69 0.18 -0.18 17.14 -0.51 -8.74 -0.87 -14.91
3 -0.37 0.18 -0.18 17.14 -0.19 -3.26 -0.55 -9.43
4 -0.29 0.18 -0.18 17.14 -0.11 -1.89 -0.47 -8.06
5 -0.45 0.18 -0.18 17.14 -0.27 -4.63 -0.63 -10.80
6 -0.45 0.18 -0.18 17.14 -0.27 -4.63 -0.63 -10.80
1E 0.61 0.18 -0.18 17.14 0.79 13.54 0.43 7.37
2E -1.07 0.18 -0.18 17.14 -0.89 -15.26 -1.25 -21.43
3E -0.53 0.18 -0.18 17.14 -0.35 -6.00 -0.71 -12.17
4E -0.43 0.18 -0.18 17.14 -0.25 -4.29 -0.61 -10.46
1T           2.49   0.94
2T           -2.19   -3.73
3T           -0.81   -2.36
4T           -0.47   -2.01

 

 

Design Pressures for Longitudinal Direction with Positive Internal Pressure

[(GCpf)-(+GCpi)]

 

 

 

Design Pressures for Longitudinal Direction with Negative Internal Pressure

[(GCpf)-(-GCpi)]

 

Pressure & Suction Coef. for Longitudinal Direction with Positive Internal Pressure

[(GCpf)-(+GCpi)]

Interior Zone (Zone 1, 2, 3, 4, 5 & 6) & End Zone (Zone 1E, 2E ,3E & 4E)

 
 
 

 

Pressure & Suction Coef. for Longitudinal Direction with Negative Internal Pressure

[(GCpf)-(-GCpi)]

Interior Zone (Zone 1, 2, 3, 4, 5 & 6) & End Zone (Zone 1E, 2E ,3E & 4E)

 
 

 

 

MWFRS Wind Load Design for Buildings of All Heights (Method 2) PER ASCE 7-05

 Job Information

Company Name

PE, INC

date

07/13/2009

Address :

PO BOX 13582

City :

MAUMELLE

State :

AR, 72113

Project No. :

LM BLADE STORAGE 2

Description :

44 METER BLADE

Designed By :

 

 Building Specifications

Basic Wind Speed (V)

150 mph

Structure Type

Building

Building Type

Enclosed

Structural Category

II

Exposure Category

C

Type of Roof

Gabled

Slope of Roof

1.5 : 12

Slope of Roof (Theta)

7.13 Degrees

Mean Roof Ht

21.88ft

Kh: 2.01*(Ht/Zg)^(2/Alpha)

0.92

Kht: Topographic Factor (Figure 6-4)

1

Qh: .00256*(V)^2*l*Kh*Kht*Kd

45psf

Roof Area

9070.04

Reduction Factor

0.8

Edge Strip (a)

6 ft

End Zone (2a)

12 ft

L

150 ft

B

60 ft

MWFRS-Wall Pressures Normal to Ridge

 

Wind Normal to 150ft Face

G

Cp

+GCpi(psf)

-GCpi(psf)

Leeward Walls

0.85

-0.5

-27.22

-11.02

Side Walls

0.85

-0.7

-34.87

-18.67


Windward Wall Cp (Refer to Figure 6-6) = 0.8

 

Elev

Kz

Kzt

qz

G

Cp

Windward Wall

Leeward Wall

ft

 

 

psf

 

 

+GCpi

-GCpi

+GCpi

-GCpi

15

0.85

1

41.56

0.85

0.8

20.16

36.36

-27.22

-11.02

20

0.90

1

44.16

0.85

0.8

21.93

38.13

-27.22

-11.02

MWFRS-Roof Pressures Normal to Ridge

Dist from Windward Edge

G

Cp

+GCpi(psf)

-GCpi(psf)

0.0 ft to 10.94 ft

0.85

-0.9

-42.52

-26.32

10.94 ft to 21.88 ft

0.85

-0.9

-42.52

-26.32

21.88 ft to 44 ft

0.85

-0.5

-27.22

-11.02

43.76 ft to 60ft

0.85

-0.3

-19.57

-3.37

 

 

 

 

 

Net Design Wind Pressures for MWFRS when Wind is Normal to Ridge

 

MWFRS-Wall Pressures Parallel to Ridge

 

Wind Parallel to 150ft Face

G

Cp

+GCpi(psf)

-GCpi(psf)

Leeward Walls

0.85

-0.28

-18.62

-2.42

Side Walls

0.85

-0.7

-34.87

-18.67


Windward Wall Cp (Refer to Figure 6-6) = 0.8

 

Elev

Kz

Kzt

qz

G

Cp

Windward Wall

Leeward Wall

ft

 

 

psf

 

 

+GCpi

-GCpi

+GCpi

-GCpi

15

0.85

1

41.56

0.85

0.8

20.16

36.36

-18.62

-2.42

20

0.90

1

44.16

0.85

0.8

21.93

38.13

-18.62

-2.42

23.75

0.94

1

45.78

0.85

0.8

23.03

39.23

-18.62

-2.42

MWFRS-Roof Pressures Parallel to Ridge

Dist from Windward Edge

G

Cp

+GCpi(psf)

-GCpi(psf)

0.0 ft to 10.94 ft

0.85

-0.9

-42.52

-26.32

10.94 ft to 21.88 ft

0.85

-0.9

-42.52

-26.32

21.88 ft to 44 ft

0.85

-0.5

-27.22

-11.02

43.76 ft to 150 ft

0.85

-0.3

-19.57

-3.37

 

 

 

Net Design Wind Pressures for MWFRS when Wind is Parallel to Ridge

Positive Internal Pressure (+GCpi)

 

 

 

Net Design Wind Pressures for MWFRS when Wind is Parallel to Ridge

Negative Internal Pressure (-GCpi)

 

 

 

 

 

C & C Wind Load Design for Buildings of All Heights (Method 2) PER ASCE 7-05

 Job Information

Company Name

PE, INC

date

07/06/2009

Address :

PO BOX 13582

City :

MAUMELLE

State :

AR, 72113

Project No. :

LM BLADE STORAGE 2

Description :

44 METER BLADE

Designed By :

 

 Building Specifications

Basic Wind Speed (V)

90 mph

Structure Type

Building

Building Type

Enclosed

Structural Category

II

Exposure Category

C

Type of Roof

Gabled

Slope of Roof

2.1 : 12

Slope of Roof (Theta)

9.93 Degrees

Mean Roof Ht

28.62ft

Kh: 2.01*(Ht/Zg)^(2/Alpha)

0.97

Kht: Topographic Factor (Figure 6-4)

1

Qh: .00256*(V)^2*l*Kh*Kht*Kd

17.14psf

Roof Area

3654.71

Reduction Factor

0.8

Edge Strip (a)

6 ft

End Zone (2a)

12 ft

L

60 ft

B

60 ft

PRESSURE, PSF

Effective Wind Area ft 2

Wall Loads (psf)

Roof Loads (psf)

Zone 4 & 5 Pressure

Zone 4 Suction

Zone 5 Suction

P (psf)

Zone 1 (Interior) Suction

Zone 2 (Edge) Suction

Zone 3 (Corner) Suction

Overhang Zone 1 & 2

Overhang Zone 3

10

18.51 -21.94 -27.08 11.66

-18.51

-32.23 -47.65

-40.80

-66.51

20

17.69 -21.03 -25.26 10.62

-18.00

-29.65 -44.56

-40.80

-60.32

30

17.21 -20.50 -24.20 10.02

-17.70

-28.14 -42.75

-40.80

-56.70

40

16.87 -20.12 -23.44 10

-17.48

-27.07 -41.46

-40.80

-54.13

50

16.61 -19.83 -22.85 10

-17.32

-26.24 -40.47

-40.80

-52.13

60

16.39 -19.59 -22.37 10

-17.18

-25.56 -39.65

-40.80

-50.50

70

16.21 -19.38 -21.97 10

-17.06

-24.98 -38.96

-40.80

-49.13

80

16.05 -19.21 -21.62 10

-16.97

-24.49 -38.37

-40.80

-47.93

90

15.91 -19.05 -21.31 10

-16.88

-24.05 -37.84

-40.80

-46.88

100

15.79 -18.91 -21.03 10

-16.80

-23.66 -37.37

-40.80

-45.94

125

15.52 -18.62 -20.44 10

-16.80

-23.66 -37.37

-40.80

-45.94

150

15.31 -18.38 -19.96 10

-16.80

-23.66 -37.37

-40.80

-45.94

175

15.13 -18.18 -19.56 10

-16.80

-23.66 -37.37

-40.80

-45.94

200

14.97 -18.00 -19.21 10

-16.80

-23.66 -37.37

-40.80

-45.94

225

14.83 -17.85 -18.90 10

-16.80

-23.66 -37.37

-40.80

-45.94

250

14.70 -17.71 -18.62 10

-16.80

-23.66 -37.37

-40.80

-45.94

275

14.59 -17.58 -18.37 10

-16.80

-23.66 -37.37

-40.80

-45.94

300

14.49 -17.47 -18.14 10

-16.80

-23.66 -37.37

-40.80

-45.94

325

14.39 -17.36 -17.93 10

-16.80

-23.66 -37.37

-40.80

-45.94

350

14.31 -17.27 -17.74 10

-16.80

-23.66 -37.37

-40.80

-45.94

375

14.22 -17.18 -17.55 10

-16.80

-23.66 -37.37

-40.80

-45.94

400

14.15 -17.09 -17.38 10

-16.80

-23.66 -37.37

-40.80

-45.94

425

14.08 -17.01 -17.23 10

-16.80

-23.66 -37.37

-40.80

-45.94

450

14.01 -16.94 -17.07 10

-16.80

-23.66 -37.37

-40.80

-45.94

475

13.95 -16.87 -16.93 10

-16.80

-23.66 -37.37

-40.80

-45.94

500

13.89 -16.80 -16.80 10

-16.80

-23.66 -37.37

-40.80

-45.94

Coefficients

Effective Wind Area ft 2

Wall Loads (psf)

Roof Loads (psf)

Zone 4 & 5 Pressure

Zone 4 Suction

Zone 5 Suction

P (psf)

Zone 1 (Interior) Suction

Zone 2 (Edge) Suction

Zone 3 (Corner) Suction

Overhang Zone 1 & 2

Overhang Zone 3

10

1.08 -1.28 -1.58 0.68

-1.08

-1.88 -2.78

-2.38

-3.88

20

1.03 -1.23 -1.47 0.62

-1.05

-1.73 -2.60

-2.38

-3.52

30

1.00 -1.20 -1.41 0.58

-1.03

-1.64 -2.49

-2.38

-3.31

40

0.98 -1.17 -1.37 0.56

-1.02

-1.58 -2.42

-2.38

-3.16

50

0.97 -1.16 -1.33 0.54

-1.01

-1.53 -2.36

-2.38

-3.04

60

0.96 -1.14 -1.31 0.52

-1.00

-1.49 -2.31

-2.38

-2.95

70

0.95 -1.13 -1.28 0.51

-1.00

-1.46 -2.27

-2.38

-2.87

80

0.94 -1.12 -1.26 0.50

-0.99

-1.43 -2.24

-2.38

-2.80

90

0.93 -1.11 -1.24 0.49

-0.98

-1.40 -2.21

-2.38

-2.73

100

0.92 -1.10 -1.23 0.48

-0.98

-1.38 -2.18

-2.38

-2.68

125

0.91 -1.09 -1.19 0.48

-0.98

-1.38 -2.18

-2.38

-2.68

150

0.89 -1.07 -1.16 0.48

-0.98

-1.38 -2.18

-2.38

-2.68

175

0.88 -1.06 -1.14 0.48

-0.98

-1.38 -2.18

-2.38

-2.68

200

0.87 -1.05 -1.12 0.48

-0.98

-1.38 -2.18

-2.38

-2.68

225

0.87 -1.04 -1.10 0.48

-0.98

-1.38 -2.18

-2.38

-2.68

250

0.86 -1.03 -1.09 0.48

-0.98

-1.38 -2.18

-2.38

-2.68

275

0.85 -1.03 -1.07 0.48

-0.98

-1.38 -2.18

-2.38

-2.68

300

0.85 -1.02 -1.06 0.48

-0.98

-1.38 -2.18

-2.38

-2.68

325

0.84 -1.01 -1.05 0.48

-0.98

-1.38 -2.18

-2.38

-2.68

350

0.83 -1.01 -1.03 0.48

-0.98

-1.38 -2.18

-2.38

-2.68

375

0.83 -1.00 -1.02 0.48

-0.98

-1.38 -2.18

-2.38

-2.68

400

0.83 -1.00 -1.01 0.48

-0.98

-1.38 -2.18

-2.38

-2.68

425

0.82 -0.99 -1.00 0.48

-0.98

-1.38 -2.18

-2.38

-2.68

450

0.82 -0.99 -1.00 0.48

-0.98

-1.38 -2.18

-2.38

-2.68

475

0.81 -0.98 -0.99 0.48

-0.98

-1.38 -2.18

-2.38

-2.68

500

0.81 -0.98 -0.98 0.48

-0.98

-1.38 -2.18

-2.38

-2.68