Xingfa Aluminium, establsihed in 1984, a famous curtain wall manufacturer in China.
1.Causes and Analysis of Sash Falling Off During Typhoons:
Sashes are particularly vulnerable during typhoons, with varying damages attributable to their size and structural differences.
a) Hook-Type Open Damages:
Hook-type curtain walls employ hooks or hinges to connect sashes with frames, bearing heavy loads for larger openings. However, their direct installation and design pose safety risks, potentially leading to sash falling off during strong winds. Damage to lock sites or wind bracing can result in sash movement, while stress on the sash can cause the pin point to lose efficacy, leading to the sash falling off despite anti-falling devices. Over time, wear and tear on hooks may compromise effectiveness.
b) Four Bar Links Hinges Damages:
This model utilizes friction hinges and curtain wall frames to fix two sashes, limiting the opening angles of larger sashes. With modern buildings favoring larger glass units for ventilation and brightness, the risk of damage and falling off due to wind pressure increases.
c) Locks Damages:
Even when closed, curtain walls can sustain damage under strong wind pressure, necessitating adequate locks and quality control for widescreen sashes.
2.Curtain Wall Unit Falling Off:
Security devices are imperative for unit curtain walls in tall buildings, particularly in adverse weather conditions, to prevent falling off incidents.
3.Glass Damages:
a) Increased Wind Speed in Narrow Spaces:
Research indicates that damages often occur at the back and sides of buildings, rather than the front, due to increased wind speed and pressure in narrow spaces between buildings. This phenomenon is observed even in house windows, as evidenced by damage to glass units in the Harbourfront in Hung Hom during a typhoon originating from the southeast.
b) Scraps Damages in Typhoons:
Typhoon-driven debris poses a significant threat to glass, with high-speed scraps capable of causing severe damage. These scraps target the weakest areas of buildings, leading to splintering and subsequent dangers to property and individuals indoors. Additionally, strong winds can exacerbate indoor hazards by causing debris to enter buildings.
