Burglar-Resistant Door Anchoring via Ceiling and Floor Connections
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Solution Overview
Problem
The challenge lies in ensuring that a burglary-resistant door achieves its certified resistance class when installed in a wall opening, as existing standards do not account for variations in wall quality, leading to potential failure in achieving the desired security level due to insufficient masonry strength.
Innovation Solution
A connecting device is used that attaches the door frame to the lintel or ceiling and floor, utilizing a one-piece or separable connecting base body and element, with a channel design for secure fixation, allowing for certification of the door's resistance class regardless of the side wall masonry quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the door is anchored to side walls made of porous perforated bricks with low compressive strength, then the installation can proceed, but the burglary resistance class is reduced
Solution Approach 1:
The connecting device extends the anchoring from the side walls (vertical dimension) to the lintel and floor (horizontal dimensions), creating a three-dimensional anchoring system that bypasses the weak side wall masonry and utilizes stronger structural elements in other spatial dimensions
Solution Approach 2:
The connecting device acts as an intermediary component between the door frame and the building structure, providing a transition that allows the door to be anchored to strong elements (lintel, floor) even when the direct path through side walls is weak
2Strength
If the door is anchored to strong lintel and floor materials, then the burglary resistance class is maintained, but the dependency on side wall quality increases
Solution Approach 1:
The connecting device serves multiple functions: it anchors the door to strong structural elements (lintel, floor), provides adjustment capability for different wall opening sizes, and enables installation in various wall types without requiring specific side wall masonry quality
Solution Approach 2:
The connecting device incorporates adjustable elements that allow adaptation to different wall opening dimensions and positions, making the system dynamic and versatile rather than fixed and rigid
3Manufacturing precision
If standard test conditions in steel frames are used, then the door achieves RC classification, but the actual protection in real wall openings cannot be guaranteed
Solution Approach 1:
The connecting device is pre-designed and pre-configured with adjustment capabilities that enable the installation to achieve the standardized test conditions in the field, bridging the gap between laboratory testing and real-world application
Data Source
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Figure 3A~3B
AI summary
The invention relates to a burglar-resistant door (10) installed in a wall opening (16), comprising a door frame (12) and a door leaf (14). The door is characterized in that one or more connecting devices (38) are connected to the door frame (12) and to the door head (20) or the ceiling above the wall opening (16) and/or to the floor (22) below the wall opening (16). With this door (10), it is possible to obtain an RC classification of the overall system regardless of the stability of the side walls (26). Furthermore, connecting devices (38) consisting of a connecting base body (40) and a connecting element (42) and a method for installing a burglar-resistant door (10) in a wall opening (16) are specified. Another aspect relates to the use of a connecting device (38) or a connecting base body (40) for the burglar-resistant installation of a door (10) in a wall opening (16).