Window Frame Fastening Through Shutter Boxes for Wind Loads
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Solution Overview
Problem
In buildings with large window areas, high wind loads pose a challenge for the stable attachment of window frames to roller shutter or blind boxes made of insulating materials, leading to potential movement and damage due to insufficient force transfer.
Innovation Solution
A fastening element with a fastening section, an anchoring section, and a connecting section is used to securely attach the window frame to the building ceiling, allowing forces from wind loads to be transmitted through the fastening element into the ceiling, thereby stabilizing the window frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the window frame is attached to the roller shutter box or blind box made of insulating material, then the installation is simplified, but the wind load absorption capability is insufficient leading to instability and potential damage
Solution Approach 1:
The fastening element is divided into three distinct sections: a fastening section for connecting to the window frame, an anchoring section for securing to the building ceiling, and a connecting section linking both. This segmentation allows each part to perform its specific function optimally - the fastening section handles window attachment, the connecting section transmits forces through the roller shutter box without compromising it, and the anchoring section provides robust ceiling anchorage to absorb wind loads.
Solution Approach 2:
The fastening element acts as an intermediary component between the window frame and the building ceiling. Rather than directly attaching the window to the weak insulating material of the roller shutter box, the fastening element introduces a strong metal intermediary that spans through the roller shutter box and anchors into the load-bearing ceiling structure, thereby transmitting wind forces to a suitable support structure.
2Force
If the connecting section penetrates through the roller shutter box or blind box, then the force transfer path is established, but the roller shutter or blind functionality may be compromised
Solution Approach 1:
The connecting section is designed to penetrate only specific localized areas of the roller shutter box or blind box - specifically through the insulating material regions rather than through the functional roller compartment or blind slat areas. This localized penetration approach allows force transfer while preserving the operational integrity of the roller shutter or blind mechanisms in their designated zones.
Solution Approach 2:
The roller shutter box or blind box is functionally segmented into different zones: the roller compartment area that must remain intact for operational functionality, and the insulating material areas that can be penetrated for fastening purposes. The connecting section is strategically positioned to penetrate only the insulating material zones, thereby maintaining a clear separation between force transfer paths and functional operational zones.
3Stability of the object's composition
If the window frame is securely anchored to the building ceiling, then the stability under wind loads is improved, but the complexity of the fastening system increases
Solution Approach 1:
Multiple functions are merged into a single integrated fastening element: the fastening section for window frame attachment, the connecting section for force transmission through the roller shutter box, and the anchoring section for ceiling securement. This consolidation reduces the need for multiple separate components and assembly steps, achieving robust ceiling anchorage while maintaining relatively simple installation procedures.
Solution Approach 2:
The fastening element is designed as a multi-functional component that simultaneously performs window attachment, force transmission, and ceiling anchoring. This universal design allows a single element to handle all critical functions required for stable window installation under wind loads, reducing overall system complexity compared to using multiple specialized components.
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
Building (4, 16, 27) with at least one building ceiling (3, 19, 31), a window frame (2, 17, 29) and a roller shutter box (13, 30) or a blind box (20) which is placed between the window frame (12 , 17, 29) and the building ceiling (3, 19, 31), the building (4, 16, 27) having at least one fastening element (1, 21) with a fastening section (5, 22), an anchoring section (6, 23) and a connecting section (7, 24) connecting the fastening section (5, 22) to the anchoring section (6, 23), the window frame (2, 17, 29) being connected to the fastening section (5, 22) and the anchoring section (6, 23) is anchored in the building ceiling (3, 19, 31) and the connecting section (7, 24) penetrates the roller shutter box (13, 30) or the blind box (20).