Laminated Fiber-Reinforced Cement Beams for Fire-Resistant Construction
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Solution Overview
Problem
The existing methods for encasing steel columns and beams in building frames with fire-resistant materials are time-consuming, costly, and difficult to fabricate, especially at connection points, particularly in modular construction, and do not provide a cost-effective alternative that meets structural strength requirements.
Innovation Solution
Prefabricated load-bearing structural members made from laminated fiber-reinforced cementitious panels, which can function as both axial columns and horizontal beams, eliminating the need for traditional fire-resistant cladding by utilizing multiple layers of structural cement panels secured with chemical adhesives and fasteners, and optionally interspersed wallboard panels, to create structurally strong building frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If steel columns and beams are encased with fire-resistant material to meet building code requirements, then fire resistance is improved, but construction time and cost increase significantly
Solution Approach 1:
The patent combines the structural steel member and fire-resistant cladding into a single integrated unit. The steel beam or column is permanently attached to fire-resistant panels (such as cement board or gypsum board) during manufacturing, creating a pre-assembled component that provides both structural support and fire protection simultaneously, eliminating the need for separate encasement steps during construction
Solution Approach 2:
The fire-resistant cladding is pre-installed onto the steel members before they are transported to the construction site. This preliminary action of attaching the cladding during manufacturing rather than during on-site construction reduces construction time and allows the integrated components to be installed as complete units
2Reliability
If steel columns and beams are encased with fire-resistant material, then fire resistance is improved, but fabrication difficulty and cost increase
Solution Approach 1:
The patent divides the encasement system into separate modular panels that can be independently manufactured and then assembled to the steel member. These panels can be produced in standard sizes and configurations, making them easier to manufacture and install compared to custom-fitted encasement solutions
Solution Approach 2:
The steel member and fire-resistant panels are combined into a single pre-assembled unit during manufacturing, transferring the fabrication complexity to the controlled manufacturing environment where it can be more efficiently managed, rather than requiring complex on-site fabrication and fitting operations
3Strength
If traditional steel members are used with fire-resistant cladding, then structural strength is maintained, but overall cost and construction complexity increase
Solution Approach 1:
The patent merges the structural steel component with the fire-resistant cladding into a single integrated building component. This integration maintains all necessary structural functions while eliminating the need for separate installation steps, reducing construction complexity despite maintaining full structural strength
Solution Approach 2:
The integrated steel member with attached cladding serves multiple functions simultaneously: it provides structural support, fire protection, and potentially aesthetic finishing. This multi-functionality in a single component reduces the number of separate elements needed, simplifying the overall construction system
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 solution provides a cost-effective and structurally strong alternative to conventional encasement methods, achieving comparable strength to traditional steel frames without the need for fire-resistant cladding, while simplifying the construction process and reducing fabrication difficulties.
Implementation Method 1
multiple layers of structural cement panels (and optionally interspersed wallboard panels in certain applications) are secured together using chemical adhesives and/or fasteners
Implementation Method 2
multiple layers of structural cement panels (and optionally interspersed wallboard panels in certain applications) are secured together using chemical adhesives and/or fasteners
Data Source
AI summary
A structural member for building fabrication, includes at least two layers of structural cement panels fastened together to have a common, aligned length and a common, aligned width. A building frame is provided, including a plurality of columns each having a lower end and an upper end, a plurality of beams each secured to at least one of the columns, each of the columns and beams is made of a plurality of layers of structural cement panels fastened together to have a common, aligned length and a common, aligned width.