Wind Load (NSCP)

3.2.2 REFERENCE (Lateral) LOAD CALCULATION 3.2.2.1 3.2.2 .1 WIND LOAD CALCULATION CAL CULATION Basic formula: qz where ;

2

0.0000473 K zK zt V I

2 qz = velocity pressure evaluated at at height z above ground ground (kN/m ) 0.00004733 = numerical coefficient 0.000047 Kz = velocity pressure exposure coefficient coefficient at height z (Exposure D applies) Kzt = topographic factor 2

Kzt = (1 + K1 K2 K3) Notes: K1 K2 K3 = 0, therefore Kzt = 1.00 V = basic wind veloci velocity ty (speed (speed), ), I = importan importance ce facto factor  r  = 1.00

200

kph (Zone II)

Velocity Pressure exposure coefficient (Kz) Kz Height above ground level, z Exposure A Exposure B (m) 0 - 4.50 0.32 0.57 6.0 0.36 0.62 7.5 0.39 0.66 9.0 0.42 0.70 12.0 0.47 0.76 15.0 0.51 0.81 18.0 0.55 0.85 21.0 0.59 0.89 24.0 0.62 0.92 27.0 0.65 0.95 30.0 0.68 0.98 36.0 0.73 1.04 42.0 0.77 1.08 48.0 0.82 1.12 54.0 0.86 1.16 60.0 0.89 1.20 75.0 0.98 1.28 90.0 1.05 1.35 105.0 1.12 1.41 120.0 1.18 1.46 135.0 1.23 1.51 150.0 1.29 1.56 *Exposure D was was used in t he wind load calculation of Thirteen Martyrs Martyrs Tower 

Exposure C 0.85 0.90 0.94 0.98 1.04 1.09 1.13 1.17 1.20 1.23 1.26 1.31 1.35 1.39 1.43 1.46 1.53 1.59 1.64 1.69 1.73 1.77

Exposure D 1.03 1.08 1.12 1.16 1.22 1.27 1.31 1.34 1.37 1.40 1.43 1.48 1.52 1.55 1.58 1.61 1.68 1.73 1.78 1.82 1.86 1.89

Design Wind pressures for the main wind force resisting system shall be determined by the following equation: F = q z G Cf Af  where ;

qz = velo loccit ityy pr pressu surre evaluated at he heig ighht z of th the ce centroid of ar area Af  using exposure defined in Section 6.5.6.3.2 of ASCE 7-98 G = gust effect factor from Section 6.5.8 of ASCE 7-98 7-98 Cf = net force coefficients from Tables 6-9 through through 6-12 of ASCE ASCE 7-98  Af = projected area area normal to the the wind except except where Cf is specified for the actual surface area

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