Hinged Prefabricated Roof Segments for Faster On-Site Assembly

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Solution Overview

Problem

Existing prefabricated roof structures require separate assembly of elements on-site, which is time-consuming and inefficient, and they are difficult to transport due to their size and shape.

Innovation Solution

A prefabricated roof structure comprising hinged roof segments that can be connected and transported in a compact, flat state, allowing for simultaneous assembly on-site, with features like folding coupling plates, fixatives, and tensioning devices to ensure dimensional stability and ease of installation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If roof segments are assembled separately on-site with a crane, then the roof structure can be customized and assembled, but the assembly process is time-consuming and inefficient

Engineering Contradiction:
Improveassembly speedVSAvoidon-site assembly time
Core Design Contradiction:
ProductivityVSLoss of time

Solution Approach 1:

The roof structure is divided into multiple prefabricated segments that are manufactured separately in a factory and then assembled on-site. Each segment is a complete, functional unit that can be produced independently, allowing parallel manufacturing and reducing overall assembly time.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

All necessary assembly actions are performed in advance during factory manufacturing. The segments are pre-assembled, pre-insulated, and pre-finishing in a controlled factory environment, so that minimal assembly is required on-site - essentially just positioning and connecting the pre-prepared segments.

Inventive Principle:
Principle #10Preliminary action

2Area of stationary object

If the roof structure is made large and complex to provide sufficient space, then usable space increases, but transportation becomes difficult

Engineering Contradiction:
Improveusable space under roofVSAvoidtransportation ease
Core Design Contradiction:
Area of stationary objectVSEase of operation

Solution Approach 1:

The large roof structure is segmented into smaller, manageable units that can be transported easily. These segments are then assembled on-site to form the complete large-scale roof, combining the benefits of easy transportation with sufficient total coverage area.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The roof segments are designed to fold or collapse into a compact, flat configuration for transportation, then expand to their full three-dimensional form during assembly. This dimensional transformation allows the same structure to occupy different spatial configurations - compact for transport, expanded for use.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Area of stationary object

If the roof segments are hinged at an angle to provide headroom, then usable space under the roof increases, but the structure becomes more complex to manufacture and transport

Engineering Contradiction:
Improveheadroom under roofVSAvoidmanufacturing and transport complexity
Core Design Contradiction:
Area of stationary objectVSDevice complexity

Solution Approach 1:

The roof segments incorporate hinged joints that allow the structure to dynamically change its configuration. During transportation, the segments fold flat in a compact configuration. During assembly, the hinges are activated to create the angled, three-dimensional structure that provides headroom. This dynamic adaptability resolves the contradiction between complexity and functionality.

Inventive Principle:
Principle #15Dynamics

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

Enables rapid on-site assembly and efficient transportation of prefabricated roof structures, providing a stable and insulating roof with increased usable space and compliance with building regulations.

Implementation Method 1

each of the roof segments is hinged with one or two other of the roof segments

Methodology Applied
Scientific EffectHinge: Hinge

Implementation Method 2

at least one tensioning device that is designed to tension, in the second state, one of the folding fixing plates at the folding line towards a hinge point of the two linked roof segments

Methodology Applied
Scientific EffectTension: Tension

Data Source

PatentEP4640971A1Prefab roof construction
Publication Date: 2025.10.29 KAPPI BV
  • EP4640971A1 patent drawingFigure 1~3
  • EP4640971A1 patent drawingFigure 4~6
  • EP4640971A1 patent drawingFigure 7~9

AI summary

The invention relates to a prefabricated roof construction comprising a number of roof segments (1,2,3,4) in which each of the roof segments is hinged with one or two other of the roof segments. In a first state, the roof segments are in line with each other and in a second state, each of the roof segments is at a non-straight angle with the one or two other roof segments linked to it. In a version, the roof segments can be made dimensionally stable by means of clamping plates.