Procedure for Wind Load Calculation in BNBC 2006
Calculation :
Resources
| Table: 6.2.8 [Basic Wind Speeds] | |||
|---|---|---|---|
| Location | Basic Wind Speed (km/h) | Location | Basic Wind Speed (km/h) |
| Angarpota | 150 | Lalmonirhat | 201 |
| Bagerhat | 252 | Madaripur | 220 |
| Bandarban | 200 | Magura | 208 |
| Barguna | 260 | Manikganj | 185 |
| Barisal | 256 | Meherpur | 185 |
| Bhola | 225 | Moheshkhali | 260 |
| Bogra | 198 | Moulvibazar | 168 |
| Brahmanbaria | 180 | Munshiganj | 184 |
| Chandpur | 160 | Mymensingh | 217 |
| Chapai Nawabganj | 130 | Naogaon | 175 |
| Chittagong | 260 | Narail | 222 |
| Chuadanga | 198 | Narayanganj | 195 |
| Comilla | 196 | Narsinghdi | 190 |
| Cox's Bazar | 260 | Natore | 198 |
| Dahagram | 150 | Netrokona | 210 |
| Dhaka | 210 | Nilphamari | 140 |
| Dinajpur | 130 | Noakhali | 184 |
| Faridpur | 202 | Pabna | 202 |
| Feni | 205 | Panchagarh | 130 |
| Gaibandha | 210 | Patuakhali | 260 |
| Gazipur | 215 | Pirojpur | 260 |
| Gopalganj | 242 | Rajbari | 188 |
| Habiganj | 172 | Rajshahi | 155 |
| Hatiya | 260 | Rangamati | 180 |
| Ishurdi | 225 | Rangpur | 209 |
| Joypurhat | 180 | Satkhira | 183 |
| Jamalpur | 180 | Shariatpur | 198 |
| Jessore | 205 | Sherpur | 200 |
| Jhalakati | 260 | Sirajganj | 160 |
| Jhenaidah | 208 | Srimangal | 160 |
| Khagrachhari | 180 | St. Martin's Island | 260 |
| Khulna | 238 | Sunamganj | 195 |
| Kutubdia | 260 | Sylhet | 195 |
| Kishoreganj | 207 | Sandwip | 260 |
| Kurigram | 210 | Tangail | 160 |
| Kushtia | 215 | Teknaf | 260 |
| Lakshmipur | 162 | Thakurgaon | 130 |
| Combined Height and Exposure Coefficient CZ [Table 6.2.10] | |||
|---|---|---|---|
| Height above ground level z (metres) | Coefficient Cz | ||
| Exposure A | Exposure B | Exposure C | |
| 0-4.5 | 0.368 | 0.801 | 1.196 |
| 6 | 0.415 | 0.866 | 1.263 |
| 9 | 0.497 | 0.972 | 1.37 |
| 12 | 0.565 | 1.055 | 1.451 |
| 15 | 0.624 | 1.125 | 1.517 |
| 18 | 0.677 | 1.185 | 1.573 |
| 21 | 0.725 | 1.238 | 1.623 |
| 24 | 0.769 | 1.286 | 1.667 |
| 27 | 0.81 | 1.33 | 1.706 |
| 30 | 0.849 | 1.371 | 1.743 |
| 35 | 0.909 | 1.433 | 1.797 |
| 40 | 0.965 | 1.488 | 1.816 |
| 45 | 1.017 | 1.539 | 1.89 |
| 50 | 1.065 | 1.586 | 1.93 |
| 60 | 1.155 | 1.671 | 2.002 |
| 70 | 1.237 | 1.746 | 2.065 |
| 80 | 1.313 | 1.814 | 2.12 |
| 90 | 1.383 | 1.876 | 2.171 |
| 100 | 1.45 | 1.934 | 2.217 |
| 110 | 1.513 | 1.987 | 2.26 |
| 120 | 1.572 | 2.037 | 2.299 |
| 130 | 1.629 | 2.081 | 2.337 |
| 140 | 1.684 | 2.129 | 2.371 |
| 150 | 1.736 | 2.171 | 2.401 |
| 160 | 1.787 | 2.212 | 2.436 |
| 170 | 1.835 | 2.25 | 2.465 |
| 180 | 1.883 | 2.287 | 2.494 |
| 190 | 1.928 | 2.323 | 2.521 |
| 200 | 1.973 | 2.357 | 2.517 |
| 220 | 2.058 | 2.422 | 2.596 |
| 240 | 2.139 | 2.483 | 2.641 |
| 260 | 2.217 | 2.541 | 2.681 |
| 280 | 2.91 | 2.595 | 2.724 |
| 300 | 2.362 | 2.647 | 2.762 |
| Gust Response Factors Gh and Gz [Table 6.2.11] | |||
|---|---|---|---|
| Height above ground level (metres) | Gh and Gz | ||
| Exposure A | Exposure B | Exposure C | |
| 0-4.5 | 1.654 | 1.321 | 1.151 |
| 6 | 1.592 | 1.291 | 1.14 |
| 9 | 1.511 | 1.258 | 1.121 |
| 12 | 1.457 | 1.233 | 1.107 |
| 15 | 1.418 | 1.215 | 1.097 |
| 18 | 1.388 | 1.201 | 1.089 |
| 31 | 1.363 | 1.189 | 1.082 |
| 21 | 1.312 | 1.178 | 1.077 |
| 27 | 1.324 | 1.17 | 1.072 |
| 30 | 1.309 | 1.162 | 1.067 |
| 35 | 1.287 | 1.151 | 1.061 |
| 40 | 1.268 | 1.141 | 1.055 |
| 45 | 1.252 | 1.133 | 1.051 |
| 50 | 1.238 | 1.126 | 1.046 |
| 60 | 1.215 | 1.114 | 1.039 |
| 70 | 1.196 | 1.103 | 1.033 |
| 80 | 1.18 | 1.095 | 1.028 |
| 90 | 1.166 | 1.087 | 1.021 |
| 100 | 1.151 | 1.081 | 1.02 |
| 110 | 1.114 | 1.075 | 1.016 |
| 120 | 1.131 | 1.07 | 1.013 |
| 130 | 1.126 | 1.065 | 1.01 |
| 140 | 1.118 | 1.061 | 1.008 |
| 150 | 1.111 | 1.057 | 1.005 |
| 160 | 1.101 | 1.053 | 1.003 |
| 170 | 1.098 | 1.049 | 1.001 |
| 180 | 1.092 | 1.016 | 1 |
| 190 | 1.087 | 1.043 | 1 |
| 200 | 1.082 | 1.04 | 1 |
| 220 | 1.073 | 1.035 | 1 |
| 240 | 1.065 | 1.03 | 1 |
| 260 | 1.058 | 1.026 | 1 |
| 280 | 1.051 | 1.022 | 1 |
| 300 | 1.015 | 1.018 | 1 |