Door Frame Anchoring in Stud Walls for Burglary Resistance
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Solution Overview
Problem
Existing wall arrangements with door cutouts struggle to achieve high security standards against break-ins without complex measures, particularly in meeting burglary-resistant classes RC3 or WK3.
Innovation Solution
A wall arrangement with a stud wall section featuring vertically extending profiles planked with plasterboards, a door frame with fastening straps screwed to U-profiles, and a multi-point lock, backed with pressure-resistant materials like two-component plastic mortar or hybrid mortar, and optionally wood or metal, to enhance security and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex means are used to achieve high security standards against break-ins, then burglary protection is improved, but device complexity increases
Solution Approach 1:
The door frame is divided into a modular construction with separate main frame part, fastening lugs, and pressure-resistant backing components. This segmentation allows each element to be optimized for its specific function while collectively achieving high security standards without requiring an overly complex integrated structure.
Solution Approach 2:
The door frame combines multiple materials with complementary properties: the main frame part provides structural support, fastening lugs enable secure attachment, and pressure-resistant backing (formed from two-component plastic mortar, hybrid mortar, wood, or metal) resists forced entry. This composite approach achieves high burglary protection through material properties rather than structural complexity.
2Reliability
If multiple locking elements are used to enhance security, then burglary protection is improved, but device complexity increases
Solution Approach 1:
Multiple locking elements are strategically positioned at critical locations on the door frame - specifically at the fastening lugs and pressure-resistant backing areas - rather than uniformly distributed. This localized approach provides enhanced security where it is most needed to prevent break-ins while avoiding unnecessary complexity in less critical areas.
3Ease of manufacture
If fastening straps are screwed directly to U-profiles without intermediate layers, then ease of manufacture is improved, but burglary protection deteriorates
Solution Approach 1:
A pressure-resistant backing acts as an intermediary layer between the fastening lugs and the U-profiles or hollow profiles. This intermediate element serves dual purposes: it provides a solid anchoring surface for screws during assembly (maintaining ease of manufacture) while simultaneously creating a reinforced connection that resists forced entry (enhancing burglary protection). The backing distributes mechanical stresses and prevents direct access to the profile structure.
Data Source
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AI summary
A wall arrangement with a door opening (12) is proposed, comprising a stud wall section (18) having a supporting structure which includes vertically extending profiles which are provided on both sides with gypsum plasterboard (22) to form a sheathing, wherein the door opening (12) is formed between two vertically extending U-profiles (20) or hollow profiles, which is provided with a door frame (14) on which at least one door leaf (16) is pivotably mounted via hinges (54), wherein the door frame (14) comprises a main frame part (30A, 30B, 32) which follows the door opening (12) and which has fastening lugs (40) which are screwed to one of the U-profiles (20) or hollow profiles, wherein at least one pressure-resistant backfill (52) is formed between the fastening lugs (40) which secures the main frame part (30A, 30B, 32) with the side of the main frame part (30A, 30B,32) arranged plasterboard cladding (22), and the door leaf (16) has a multi-point locking system, the locking elements of which engage in a corresponding recess (64, 70) of the main frame part (30A) when locked.