Pre-Stressed Steel Framing for Solar Mounts

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Solution Overview

Problem

Existing steel framing systems for solar applications lack sufficient bend strength, relying on additional supports like sag rods and knee braces, which increase labor, hardware, and equipment needs.

Innovation Solution

The development of pre-stressed structural framing systems featuring specially shaped galvanized steel studs, purlins, and posts with triangulated or I-Beam shapes, designed to enhance torsion and bend strength, reducing the need for additional supports and simplifying installation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If conventional C-shaped steel studs are used for solar framing, then the structure can be assembled, but the bend strength is insufficient requiring additional supports like sag rods and knee braces

Engineering Contradiction:

Improvebend strengthVSAvoidnumber of additional supports

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The purlin is divided into multiple walls (first wall, second wall, third wall, fourth wall) forming a triangulated structure. This segmentation creates geometric rigidity that inherently resists bending without requiring additional sag rods or knee braces, directly resolving the contradiction between bend strength and structural complexity

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent uses triangulated geometric configuration combined with pre-induced stress in the steel member to create a composite structural system. The triangulated shape provides geometric strength while the pre-stressed material properties provide material strength, achieving high bend strength without additional supports

Inventive Principle:

Principle #40Composite materials

2Strength

If conventional steel studs are used, then installation can proceed, but torsion strength is insufficient requiring sag rods and knee braces to strengthen purlins

Engineering Contradiction:

Improvetorsion strengthVSAvoidnumber of sag rods and knee braces

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The purlin cross-section is segmented into multiple walls forming triangles. This triangulated configuration provides inherent torsional rigidity, eliminating the need for additional knee braces that would otherwise be required to prevent purlin deformation under torsional loads

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Pre-induced stress is applied to the purlin during manufacturing to pre-harden the structure against torsional and bending forces. This preliminary action enhances torsion strength before installation, eliminating the need for additional strengthening components

Inventive Principle:

Principle #10Preliminary action

3Quantity of substance

If conventional steel studs with narrow bases are used, then material usage is reduced, but structural angles are required to support the purlins

Engineering Contradiction:

Improvematerial usageVSAvoidnumber of structural angles

Core Design Contradiction:

Quantity of substanceVSDevice complexity

Solution Approach 1:

The purlin base is extended in the horizontal dimension to create a wide base configuration. This dimensional change provides sufficient bearing surface and structural support to eliminate the need for additional structural angles, while the triangulated wall configuration maintains material efficiency

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

4Ease of operation

If conventional steel framing is used, then installation can proceed, but labor, hardware and equipment needs increase due to additional supports

Engineering Contradiction:

Improveinstallation simplicityVSAvoidlabor and hardware requirements

Core Design Contradiction:

Ease of operationVSQuantity of substance

Solution Approach 1:

The patent extracts and eliminates the need for sag rods, knee braces, and structural angles by incorporating their support functions directly into the triangulated purlin structure itself. This reduction in components directly decreases hardware requirements and simplifies installation procedures

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The support functions previously requiring separate components (sag rods, knee braces, structural angles) are merged into the integrated triangulated purlin design. This consolidation reduces the total number of parts to install and simplifies the installation process

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20250122724A1Pre-Stressed Structural Framing System

Publication Date: 2025.04.17 SIMONSEN DAVID JOHN

AI summary

The present invention discloses steel framing members for use in load bearing solar applications to reduce the amount of steel used by providing structural shapes that allow for more bending and torsion strength which allows for greater spans between posts and rafters to reduce the number of posts, rafters and concrete used. The structural shapes further allow for the elimination of angle braces and the elimination or reduced use of sag rods, knee braces and the associated fasteners. Multiple fastener locations on the same structural member assist further in bending and torsion strengths and allow for lighter gauge materials to be used to conserve materials. Minimizing or eliminating the number of posts, rafters, concrete, angle braces, sag rods, knee braces and fasteners also reduces the amount of equipment and labor used. The labor and material savings helps make solar applications less expensive and provides a lower carbon footprint to make the possibility of using them more attainable.