Single-Layer Fireproof Partition Wall for Lateral Joint Sealing
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Solution Overview
Problem
Conventional fire-resistant partition walls with a one-hour fire-resistance rating face challenges in preventing heated air leakage through lateral joints, which compromises their fire-resistance capability and constructability, particularly due to complex screw-fastening methods and increased number of parts.
Innovation Solution
A fire-resistant partition wall design featuring a single-layer structure with studs on the back side of vertical joints and a T-letter shaped joint base member at lateral joints, fastened with different fixing members to prevent heated air leakage, while minimizing the number of screws and parts for improved constructability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single-layer wall structure is used to improve constructability, then the number of surface members is reduced, but heated air leaks through lateral joints degrading fire-resistance capability
Solution Approach 1:
A joint base member is introduced as an intermediary component at lateral joints to prevent heated air leakage. This joint base member includes a back piece contacting the back surface of surface members and a projecting piece extending in the thickness direction, creating a fire-blocking barrier without requiring multiple surface members.
Solution Approach 2:
The partition wall system is segmented into distinct functional components: surface members for structural coverage and a separate joint base member for fire blocking at lateral joints. This segmentation allows each component to perform its specific function optimally while simplifying the overall structure to single-layer walls.
2Device complexity
If multiple surface members are arranged to form lateral joints without studs to maintain structural simplicity, then construction is easier, but heated air leaks through joints compromising fire resistance
Solution Approach 1:
The joint base member serves as a mediator component installed at lateral joints where studs are absent. It fills the gap between surface members and prevents heated air penetration, maintaining both structural simplicity and fire-resistance capability.
3Reliability
If conventional screw-fastening methods are used to secure surface members and joint base member, then reliable connection is achieved, but the number of screws and parts increases reducing constructability
Solution Approach 1:
The joint base member is designed to be fixed to the back piece of surface members using the same type of fixing members (screws) that secure the surface members to studs. This merging of fastening methods reduces the variety of parts and simplifies the construction process while maintaining reliable connections.
4Reliability
If offset joint positions between base layer and top layer are used to prevent heated air leakage, then fire-resistance is improved, but the number of surface members increases to four or more complicating construction
Solution Approach 1:
The fire-blocking function previously achieved through offset joint positions requiring multiple surface members is extracted and concentrated into a single joint base member component. This allows single-layer walls to achieve the same fire-resistance protection with fewer surface members, reducing construction complexity.
Data Source
AI summary
A fire-resistant partition wall includes multiple studs, and first and second walls. First and second walls are respectively provided as a single-layer wall on both surfaces of the fire-resistant partition wall. First and second walls are each formed of multiple surface members arranged vertically and horizontally. Vertical and lateral joints are formed in each of first and second walls. The studs are on a back side of vertical joints. A joint-base member having fire-blocking capability is provided at lateral joints. The joint-base member includes back-piece and projecting-piece projecting in thickness direction of gypsum boards. A transverse cross-section of the joint-base member has T-shape. The surface members, joint-base member, and studs are not fastened with a common fixing member. All of the surface members are fastened to the studs with first-fixing member. One of the two surface members next to each other vertically is fastened to the back-piece with second-fixing member.