Fire Door Stop System with Intumescent Seal for Clearance Compliance
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Solution Overview
Problem
Existing fire door assemblies often fail inspections due to excessive clearance between the fire door and the door frame, which is exacerbated by building settlement and imperfect installation, leading to gaps that compromise fire safety standards.
Innovation Solution
A fire door stop system comprising a steel profile strip with an intumescent sealant that expands with heat to seal gaps, along with edge protectors and a latch protector, which increases the overlap between the fire door and frame, ensuring compliance with safety codes and maintaining structural integrity during fires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fire door assemblies are built to minimum standards with precise clearances, then fire safety compliance is achieved, but installation complexity and cost increase
Solution Approach 1:
The door stop system is divided into modular components including profile strips, edge protectors, and latch protectors that can be independently installed. This segmentation allows for simplified installation while maintaining the required fire safety compliance, as each module addresses specific clearance issues without requiring complete disassembly or complex adjustments to the entire door assembly.
Solution Approach 2:
The door stop system components are pre-fabricated with precise dimensions and attachment mechanisms before installation. The profile strips and protectors are manufactured to exact specifications that compensate for common installation variations and building settlement, eliminating the need for complex on-site adjustments and ensuring fire safety compliance from the outset.
2Reliability
If door clearances are reduced to meet code requirements, then fire safety standards are met, but manufacturing precision requirements increase
Solution Approach 1:
The door stop system acts as an intermediary element between the door and frame, providing a adjustable interface that compensates for clearance variations. The profile strips and protectors can be positioned and secured to achieve the required overlap and clearance specifications, absorbing manufacturing tolerances without requiring extreme precision in the door and frame fabrication themselves.
Solution Approach 2:
The door stop system allows for adjustment of clearance parameters after installation. The modular components can be positioned at varying distances from the door edge and secured with fasteners that allow for fine-tuning the overlap and clearance dimensions, enabling compliance with fire safety standards even when initial manufacturing tolerances vary.
3Stability of the object's composition
If building settlement is accommodated by increasing clearance, then structural stability is maintained, but fire safety compliance deteriorates
Solution Approach 1:
The door stop system incorporates adjustable and flexible components that can adapt to changes in door position caused by building settlement. The profile strips and protectors can be repositioned and resecured to maintain proper overlap and clearance dimensions even as the building settles, allowing the system to dynamically accommodate structural changes while preserving fire safety compliance.
4Reliability
If door and frame are shimmed to eliminate excessive clearance, then fire safety compliance is improved, but ease of repair deteriorates
Solution Approach 1:
The door stop system extracts the clearance correction function from the door and frame structure itself, providing a separate, removable component that addresses excessive clearance without permanently modifying the door or frame. This allows for easy removal and replacement of the door stop components if repair or adjustment is needed, maintaining ease of repair while achieving compliance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively seals gaps, ensuring fire doors meet safety standards, withstands hose stream pressure, and maintains structural integrity during fires, with tested compliance across various door types and conditions, including wood and steel doors.
Implementation Method 1
an intumescent sealant that expands with heat to seal gaps
Data Source
AI summary
A fire door stop system for retrofitting a fire door assembly so as to bring the assembly into compliance with fire safety codes. The fire door stop system has a profile strip includes at least one flange and intumescent seal that is attachable to a fire door frame. The fire door stop system further includes, as needed, edge protectors for a wood fire door, such as a horizontal edge protector, a vertical edge protector, and a bottom-edge extender, and a latch protector.