Self-aligning corner bead for structural steel fireproofing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing corner beads for fireproofing structural steel face challenges in accurately gauging and uniformly applying fireproofing material, particularly around corners, due to difficulty in aligning with adjacent surfaces and lack of a dam for wet cement, leading to uneven applications and requiring skilled installation.
Innovation Solution
A self-aligning double wire corner bead made from a single strip of welded wire fabric, bent to form dihedral angles and wings, which automatically aligns along three surfaces, providing a uniform thickness and acting as a dam for the fireproofing material until it hardens, eliminating the need for adjusting legs and ensuring accurate thickness distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional v-bend corner bead with adjustable legs is used, then the corner bead can be attached to metal lath or wire mesh, but the alignment with adjacent surfaces is difficult and requires great skill to install
Solution Approach 1:
The corner bead is designed with a self-aligning mechanism where the vertex automatically positions itself relative to the adjacent surfaces through the geometry of the base wires and flanges. The predetermined spacing and angular relationships between components enable the bead to self-align during installation without requiring skilled adjustment, thereby improving ease of operation while maintaining alignment accuracy.
Solution Approach 2:
The corner bead is pre-configured with predetermined flange lengths, base wire spacing, and angular relationships before installation. This preliminary setup eliminates the need for on-site adjustment and alignment work, allowing installers to simply attach the pre-aligned bead to the surfaces, significantly improving installation ease while preserving measurement precision.
2Ease of manufacture
If a traditional corner bead with adjustable legs is used, then attachment to metal lath is possible, but the gauging of fireproofing material thickness is inaccurate
Solution Approach 1:
The invention replaces the mechanical adjustment system (adjustable legs) with a predetermined geometric system where the flange lengths and angular relationships are fixed during manufacturing. This substitution maintains manufacturing simplicity while improving thickness gauging accuracy because the fixed geometry provides consistent reference dimensions for measuring fireproofing material application.
Solution Approach 2:
The corner bead uses predetermined parameters (flange lengths, base wire spacing, angles) that are optimized during design to provide accurate thickness gauging. By changing from adjustable parameters to predetermined fixed parameters, the system achieves both ease of manufacture and improved measurement precision for fireproofing material thickness.
3Ease of operation
If a traditional corner bead is used, then it can be installed on structural steel members, but the application of fireproofing material is uneven
Solution Approach 1:
The corner bead's geometry enables it to self-align and automatically maintain uniform spacing from adjacent surfaces during installation. This self-aligning capability ensures that fireproofing material is applied evenly across all surfaces without requiring skilled installation techniques, thereby improving both installation simplicity and material uniformity.
Solution Approach 2:
The corner bead is pre-configured with predetermined flange lengths and angular relationships that are designed to create uniform fireproofing material distribution. This preliminary geometric configuration ensures that when the bead is installed, it automatically maintains consistent spacing from surfaces, resulting in uniform fireproofing application without requiring complex installation procedures.
4Device complexity
If a traditional corner bead without a dam is used, then installation is simpler, but there is no dam for wet cement material leading to uneven application
Solution Approach 1:
The corner bead is designed with multiple functions integrated into a single structure: the flanges serve both as attachment elements to the surfaces and as dams to contain wet fireproofing material. This multi-functionality adds minimal structural complexity while simultaneously providing the dam function needed for uniform material application, resolving the contradiction between device complexity and material distribution uniformity.
Data Source
AI summary
A self-aligning corner bead for fireproofing structural steel, having a strip of welded wire fabric cut to the appropriate width for the fireproofing thickness and bent longitudinally to form an obtuse V-shaped device is disclosed. A plastic nosing is installed along one edge. A method of finishing the corners for fireproofing of structural steel member using an improved corner bead includes the step of attaching the first wing of an obtuse V-shaped device through a lathe to the structural steel member utilizing pneumatic or screw type fasteners. The mesh structure of the second wing of the V-shaped device provides a dam to form a roughened surface on the first application of fireproofing material until it hardens.