Views: 0 Author: Guangdong Rolansini Home Furnishing Technology Co., Ltd. Publish Time: 2025-01-27 Origin: https://www.rolansini-windows.com/
A suspended window is a window that opens along a horizontal axis, depending on the position of the hinge and pivot. Hanging windows can be divided into three opening forms: upper hanging windows, lower hanging windows, and middle hanging windows.
The hinge is installed on the upper side of the window sash and opens towards the outside direction. This type of window generally has better rain resistance.
External awning windows are also a type of hanging window, belonging to the casement window series like other hanging windows.
Good ventilation. Alumium awning windows can also prevent strong winds from directly blowing on the human body, and have certain wind resistance performance.
Excellent safety performance. Due to the fact that the upper hanging window is fixed by its hardware accessories when closed, it is not easy to open from the outside and has excellent anti-theft ability. Using an upper hanging window can reduce collisions.
Easy to clean and maintain hygiene. Awning windows can face inward or outward, making them very easy to clean.
Strong practicality. Not occupying space, even if you forget to close the window, it is difficult for rainwater to enter the room during rain.
Good sealing performance. When the hanging window is closed, it can be fixed with door and window accessories, and its structural characteristics make it have good sealing performance.
The so-called suspended window refers to a window composed of a window frame and a window sash fixed with glass. Its characteristic is that the window sash is hinged in the middle of the window frame by a suspended bracket, and the floating mullion is divided into two parts, with the upper part fixed to the window frame and the lower part fixed to the window sash.
Good ventilation performance. Mid hung windows have the largest opening area, which is conducive to indoor air circulation and has strong circulation.
Strong practicality. Avoiding the occupation of indoor space when the internal casement window is opened, it can prevent conflicts with items near the indoor window.
Good sealing and insulation performance. By sealing and locking multiple locking points around the window sash, the sealing and insulation effects of the doors and windows are ensured, greatly enhancing the sealing performance of the windows.
The hinge is installed under the window, with the upper hanging window facing outdoors and the lower hanging window facing indoors. This opening method is also known as inward tilting. At present, the most commonly used type of window in households is inward opening and inward tilting. This type of window not only allows for downward suspension, but also enables inward swing.
When inverted, it does not occupy indoor space, the curtains can open and close freely, and the lifting clothes rack will not conflict with the window sash;
When pouring inside, only close the window indoors before opening it to the inside open state, and the opening angle is small. Even if you go out, you can switch to the inside pouring mode, maintaining fresh indoor air without worrying about strangers entering your home;
When using internal ventilation in winter, the wind enters the room from both sides and the top, without directly blowing onto people, making you feel more comfortable;
Opening windows for ventilation on rainy days can effectively prevent rainwater from entering the room;
Opening the window sash inside can facilitate homeowners to clean the glass outside the room.
In Australia, chain winder awning windows are the most basic and mainstream window type on the market.
Aluminum chain winder awning windows in Australia generally use hand cranks (manual opening devices), which is closely related to local climate conditions, building standards, usage requirements, and safety factors. The following is an analysis of the specific reasons:
Climate Characteristics: Australia's climate is highly variable, with some areas experiencing hot and dry weather (such as the inland) and others experiencing humid and rainy weather (such as the coastal areas). Top-hung windows are designed to open from the top, creating cross-ventilation and promoting air circulation while reducing the risk of rainwater entering the room. The hand crank allows for precise adjustment of the opening angle to meet ventilation needs in varying weather conditions.
Rainproofing: Top-hung windows can be opened slightly to maintain ventilation on rainy days, while the hand crank's mechanical structure ensures a tight seal when closed, preventing rainwater from seeping in.
Control Force Requirements: According to Australian Standard AS2047, the initial and sustained opening forces for doors and windows are strictly limited (for example, the initial opening force for sliding windows is 110N and the sustained opening force is 90N). The hand crank distributes the operating force to the hinge system through mechanical transmission (such as gears and connecting rods), reducing the actual force required by the user and ensuring compliance with the standard. Deflection and Stability: AS2047 requires doors and windows to maintain structural stability under wind pressure (e.g., deflection control value of L/150 to L/250). The mechanical transmission design of the hand crank reduces the risk of deformation during opening, enhancing the durability and wind resistance of the window.
No Power Dependence: Manual operation does not rely on a power source. Even during power outages or extreme weather conditions (such as thunderstorms and hurricanes), users can still safely close or adjust windows with the hand crank, avoiding safety hazards caused by power failures.
Preventing Accidental Opening: Top-hung windows have hinges located high, making them difficult for children or pets to reach. However, manual operation requires a certain amount of strength and skill, further reducing the risk of accidental operation (especially in high-rise buildings).
Affordability: The manufacturing and installation costs of manual hand cranks are significantly lower than those of electric systems, making them suitable for large-scale residential applications. Australian housing policies encourage energy-saving and low-cost designs, and hand cranks align with this trend.
Easy Maintenance: Mechanical hand cranks have a long lifespan and require minimal maintenance. There's no need to worry about circuit aging or motor failure, making them suitable for long-term use.
Historical Use: Australian door and window designs have a long tradition of manual operation, especially in the residential sector, where manual cranks have become standard. Users are familiar with this method of operation and do not need to learn how to use an electric system.
Compatibility: The structure and frame design of many existing buildings are more suitable for manual opening systems, making manual cranks more convenient for retrofits or replacements.
Fine-Adjustment Functionality: Manual cranks allow users to adjust the window opening angle by rotating it (e.g., by only opening it 10° to 30°), enabling more precise ventilation control. This is particularly important in buildings where maintaining a stable indoor temperature is crucial, such as laboratories and greenhouses.
Quiet Operation: Manual mechanical transmission is quieter than electric systems, reducing noise disruption (especially at night or in locations where a quiet environment is required).
The widespread use of hand cranks on top-hung windows in Australia stems from a comprehensive consideration of climate adaptability, building standards, safety, affordability, and user habits. These hand cranks not only meet the controllability and stability requirements of the AS2047 standard, but also provide reliable ventilation control while avoiding electricity dependence and high maintenance costs. This design has become widely accepted and established as industry practice in both residential and commercial buildings across Australia.
