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SH NG CONSULTANTS

LOCATION

PART4 SINGAPORE

S.H. NG CONSULTANTSNo 44, Yunnan Crescant, Singapore 638346

Tel +65 6794 9227 Fax +65 6794 2945

Email shngmain@singnet.com.sg

WIND FORCE CALCULATION CP 3 CHAPTER VPART 2 1972

This calculation is the copyright of SH NG CONSULTANTS and must not be reproduced in any part without prior written permission

29-May-2013

COMPANY

NAME

DATE

PROJECT

NAME

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35 30 178 185

S1 = 1.000 T = 50

S2 = 1.000 P = 1

S3 = 1.000 S1 = 1

Category = 1Class = 3

q = 0.75

Height q kN/m2

0 0.403 0.405 0.46

10 0.61

15 0.6620 0.6930 0.7530 0.7530 0.7530 0.7530 0.7530 0.7530 0.7530 0.7530 0.7530 0.7530 0.75

Vs = 35.0

Dynamic

pressure (Max)

HEIGHT/m

Basic Wind Speed Height

CP 3 CHAPTER V PART 2

1972

Width Length

H (m)

All cases except b & c

WIND FORCE CALCULATION

Vb (m/s)

Open Country with no obstructions

Return Period(Years)

Probability Level

w (m) l (m)

Topography

factor

Dynamic Pressure q kN/m2

Ground

roughnes

s

All buildings & Stru whose gratest

horizontal dimension or gratest vertical

dimension exceeds 50m

Design Wind

Speed

0

5

10

15

20

25

30

35

.000

.100

.200

.300

.400

.500

.600

.700

.800

PRINT

PRINT

PRINT

PRINT

PRINT

PRINT

PRINTPRINT

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1) DYNAMIC PRESSURE

Basic wind speed Vb /m/s = 35 m/s

Height of the building h /m = 30 m

Cl 5.4 Table 2 Topography factor S1 = 1.00

Cl 5.5.1 Ground roughness category = 1

Cl 5.5.2 Clading & Building size (Class) = C

Table 3 Ground roughness factor S2 = 1.00

Fig 2 & Appx C Stastical factor S3 = 1.00

Cl 4.3 Design Wind Speed Vs = VbxS1xS2xS3

= 35x1x1x1

= 35.0 m/s

Cl 6 Dynamic Pressure q = qxVs2

= 0.75 kN/m2

Height q kN/m2

0 0.400

3 0.400

5 0.457

10 0.608

15 0.664

20 0.692

30 0.751

30 0.751

30 0.751

30 0.751

30 0.751

30 0.751

30 0.751

30 0.751

30 0.751

30 0.751

30 0.751

Dynamic Pressure (q) kN/m2

WIND FORCE CALCULATION

29-May-2013

PROJECT NAME

COMPANY NAME

PART4 SINGAPORE

LOCATION

DATECP 3 CHAPTER V PART 2 1972

Height/m

Open Country with no obstructions

All buildings & Stru whose gratest horizontal dimension

or gratest vertical dimension exceeds 50m

0

5

10

15

20

25

30

35

0.000

0.100

0.200

0.300

0.400

0.500

0.600

0.700

0.800

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SH NG CONSULTANTS

1. DIMENSION

Frame spacing 9.00 m

Frame span 54.00 m2. BASIC DESIGN LOAD

metal roof: dl = 0.40 kN/m2

IL = 0.50 kN/m2

sheet/isolation/purlin: 0.15 kN/m2

services: 0.25 kN/m2

0.40 kN/m2

wind load: wl = 0.75 kN/m2

(basic pressure)

WIND = 0

WW -0.90

LW -0.60

WW 0.70

LW -0.20

90o -0.50

0.20

-0.30

WIND = 90

Left -0.8

Right -0.8

WW -0.5

LW -0.5

Side

0.20

-0.30

COMPANY NAME

PROJECT NAME

WIND FORCE CALCULATION

CP 3 CHAPTER V PART 2 1972 29-May-2013

LOCATION

DATE

External Pressure

Coefficient "ce"

Roof

Internal Pressure

Coefficient "ci"

WallW

IND=0

Internal Pressure

Coefficient "ci"

WIND=90

External Pressure

Coefficient "ce"

Roof

Wall

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3. DESIGN LOAD

DEAD LOAD:

roof: UniDL= 0.40 x 9.0 m = 3.6 kN/m

LIVE LOAD:

roof: UniIL = 0.50 x 9.0 m = 4.5 kN/m

roof 1: 0.75 x 9.0 m x -0.60 = -4.05 kN/m

roof 2: 0.75 x 9.0 m x -0.30 = -2.03 kN/m

wall 1 0.75 x 9.0 m x 1.00 = 6.76 kN/m

wall 2 0.75 x 9.0 m x 0.10 = 0.68 kN/m

wall 3 0.75 x 9.0 m x -0.20 = -1.35 kN/m

wall 4 0.75 x 9.0 m x -0.20 = -1.35 kN/m

roof 1: 0.75 x 9.0 m x -1.10 = -7.43 kN/m

roof 2: 0.75 x 9.0 m x -0.80 = -5.41 kN/m

wall 1 0.75 x 9.0 m x 0.50 = 3.38 kN/m

wall 2 0.75 x 9.0 m x -0.40 = -2.70 kN/mwall 3 0.75 x 9.0 m x -0.70 = -4.73 kN/m

wall 4 0.75 x 9.0 m x -0.70 = -4.73 kN/m

roof 1: 0.75 x 9.0 m x -0.50 = -3.38 kN/m

roof 2: 0.75 x 9.0 m x -0.50 = -3.38 kN/m

wall 1 0.75 x 9.0 m x 0.30 = 2.03 kN/m

wall 2 0.75 x 9.0 m x 0.30 = 2.03 kN/m

wall 3 0.75 x 9.0 m x -0.20 = -1.35 kN/m

wall 4 0.75 x 9.0 m x -0.20 = -1.35 kN/m

roof 1: 0.75 x 9.0 m x -1.00 = -6.76 kN/m

roof 2: 0.75 x 9.0 m x -1.00 = -6.76 kN/m

wall 1 0.75 x 9.0 m x -0.20 = -1.35 kN/m

wall 2 0.75 x 9.0 m x -0.20 = -1.35 kN/m

wall 3 0.75 x 9.0 m x -0.70 = -4.73 kN/m

wall 4 0.75 x 9.0 m x -0.70 = -4.73 kN/m

NHL L OAD:

DIR 1-NL1 N1 = 5.04 kN/m x 27.0 m x 0.005 = 0.68 kNN2 = 5.04 kN/m x 13.5 m x 0.005 = 0.34 kN

N2 = 7.20 kN/m x 27.0 m x 0.005 = 0.97 kN

N4 = 7.20 kN/m x 13.5 m x 0.005 = 0.49 kN

DIR 2-NL2 N1 = 5.04 kN/m x 10.0 m x 0.005 = 0.25 kN

N2 = 5.04 kN/m x 5.0 m x 0.005 = 0.13 kN

N2 = 7.20 kN/m x 10.0 m x 0.005 = 0.36 kN

N4 = 7.20 kN/m x 5.0 m x 0.005 = 0.18 kN

WL-4

WL-3

WIND LOAD: 0 deg

WIND LOAD: 90 deg

internal0.2

internal-0.3

inte

rnal0.2

WL-2

W

L-1

internal-0.3

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A B C A B C A

1 0 0.83 0.78 0.73 0.72 0.67 0.63 0.64

2 3 0.83 0.78 0.73 0.72 0.67 0.63 0.643 5 0.88 0.83 0.78 0.79 0.74 0.70 0.70

4 10 1.00 0.95 0.90 0.93 0.88 0.83 0.78

5 15 1.03 0.99 0.94 1.00 0.95 0.91 0.88

6 20 1.06 1.01 0.96 1.03 0.98 0.94 0.95

7 30 1.09 1.05 1.00 1.07 1.03 0.98 1.01

8 40 1.12 1.08 1.03 1.10 1.06 1.01 1.05

9 50 1.14 1.10 1.06 1.12 1.08 1.04 1.08

10 60 1.15 1.12 1.08 1.14 1.10 1.06 1.10

11 80 1.18 1.15 1.11 1.17 1.13 1.09 1.13

12 100 1.20 1.17 1.13 1.19 1.16 1.12 1.16

13 120 1.22 1.19 1.15 1.21 1.18 1.14 1.18

14 140 1.24 1.20 1.17 1.22 1.19 1.16 1.20

15 160 1.25 1.22 1.19 1.24 1.21 1.18 1.21

16 180 1.26 1.23 1.20 1.25 1.22 1.19 1.23

17 200 1.27 1.24 1.21 1.26 1.24 1.21 1.24

18 250 1.27 1.24 1.21 1.26 1.24 1.21 1.24

1 2 3 4 5 6 7

1 2 3 1 2 3 1

7 30.00 1.09 1.05 1 1.07 1.03 0.98 1.01

Local Cp

A B C D

111 0 0.70 -0.20 -0.50 -0.50

112 90 -0.50 -0.50 0.70 -0.20

121 0 0.70 -0.25 -0.60 -0.60122 90 -0.50 -0.50 0.70 -0.10

211 0 0.70 -0.25 -0.60 -0.60

212 90 -0.60 -0.60 0.70 -0.25

221 0 0.70 -0.30 -0.70 -0.70

222 90 -0.50 -0.50 0.70 -0.10

311 0 0.80 -0.25 -0.80 -0.80

312 90 -0.80 -0.80 0.80 -0.25

321 0 0.70 -0.40 -0.70 -0.70

-1.1

-1.1

-1.2

Table 07

Building

Height

Building Plan

ratioWind Angle

-1

-0.8

Cpe for surface

Table 3 Ground roughness, Building size and height above Ground, factor S2

HeightOpen country with no obstructions

Open country with no

obstructions

Open

423

wl

42

3

w

l

43

l

2

1

w

h

2

3

2

1

w

h

2

3

2

1

w

h

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322 90 -0.50 -0.50 0.80 -0.10

0 0.70 -0.20 -0.50 -0.50

90 -0.50 -0.50 0.70 -0.20

current 0.7 -0.2 -0.5 -0.5

1

0 90

2

Vlookup= 111 111 112

3 1

4 1

5 1

-1.22 w

2

1

w

h

2

3

2

1

w

h

2

3

2

1

w

h

2

31

w

l

42

3

w

l

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S2

B C A B C 4

0.60 0.55 0.56 0.52 0.47

0.60 0.55 0.56 0.52 0.470.65 0.60 0.60 0.55 0.50 30

0.74 0.69 0.67 0.62 0.58 40

0.83 0.78 0.74 0.69 0.64 30.00

0.90 0.85 0.79 0.75 0.70

0.97 0.92 0.90 0.85 0.79 1

1.01 0.96 0.97 0.93 0.89 3

1.04 1.00 1.02 0.98 0.94

1.06 1.02 1.05 1.02 0.98

1.10 1.06 1.10 1.07 1.03

1.12 1.09 1.13 1.10 1.07

1.15 1.11 1.15 1.13 1.10

1.17 1.13 1.17 1.15 1.12

1.18 1.15 1.19 1.17 1.14

1.20 1.17 1.20 1.19 1.16

1.21 1.18 1.22 1.21 1.18

1.21 1.18 1.22 1.21 1.18

8 9 10 11 12

2 3 1 2 3

0.97 0.92 0.9 0.85 0.79

country with no

bstructions

Open country with no

obstructions

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1.09 1.05 1 1.07 1.03 0.98 1.01 0.97 0.92

1.12 1.08 1.03 1.1 1.06 1.01 1.05 1.01 0.96

1.09 1.05 1 1.07 1.03 0.98 1.01 0.97 0.92

3

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0.9 0.85 0.79

0.97 0.93 0.89

0.9 0.85 0.79