This standard provides guidelines for the cyclone-resistant design and construction of buildings up to 15m in height. It outlines key principles for site selection, building form, and structural integrity, focusing on creating a continuous load path to safely transfer high-velocity wind loads from the roof and walls to the foundation.
Provides general guidelines for the design and construction of buildings to resist cyclone forces.
Quick Reference Values
minimum shell thickness150 mm
minimum vertical reinforcement0.25% of gross concrete area
minimum horizontal reinforcement0.20% of gross concrete area
maximum reinforcement spacing250 mm
minimum clear cover50 mm
Key Formulas
T_x = T_i - (T_i - T_o) * (R_x / R_t) — Temperature distribution across shell thickness
f_c = (N / A) + (M / Z) ± f_temp — Combined stresses due to axial load, moment, and temperature
Practical Notes
Across-wind loads due to vortex shedding often govern the structural design of tall chimneys and require dynamic analysis.
Thermal stresses induced by temperature gradients across the concrete shell are significant and must be combined with wind or seismic load combinations.
Special attention must be given to concrete mix design and cover to protect reinforcement from aggressive chemical exposure due to flue gases.