Prefabricated Foundation Frame for Elevator Retrofitting
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Solution Overview
Problem
Retrofitting buildings with elevator systems is challenging due to the complexity of detaching the stairwell facade, aligning the stairwell module, and installing the prefabricated elevator system, which is time-consuming and not optimal in terms of efficiency.
Innovation Solution
A prefabricated foundation frame is used, pre-measured to fit the stairwell dimensions, with attachment points for the elevator system and pivot bearings for easy alignment, allowing the elevator system to be precisely placed without on-site adjustments, and a pile foundation that distributes weight without damaging supply lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the stairwell facade is detached and a prefabricated stairwell module is installed, then barrier-free access is achieved, but construction time increases due to complex alignment processes
Solution Approach 1:
The foundation frame is pre-assembled with precise geometric dimensions and mounting points determined before installation. The stairwell module is pre-measured and pre-aligned with the foundation frame, eliminating the need for complex on-site alignment operations and reducing construction time while maintaining barrier-free access.
Solution Approach 2:
The foundation frame serves as an intermediary element between the building structure and the prefabricated stairwell module. It provides pre-determined mounting points and geometric references that simplify the installation process and reduce alignment complexity, thereby reducing construction time.
2Productivity
If a prefabricated elevator system is installed in front of the stairwell, then installation time is reduced, but access to floor doors remains difficult requiring stair climbing
Solution Approach 1:
The elevator system is merged with the prefabricated stairwell module through integrated mounting points and geometric alignment. The elevator car is positioned such that its doors align with the floor doors via the stairwell module's walkways and landings, providing barrier-free access while maintaining fast installation.
Solution Approach 2:
The prefabricated stairwell module replicates the functional layout of a traditional stairwell including walkways, landings, and staircase sections, but optimized to accommodate elevator integration. This copying of functional elements enables barrier-free access while allowing rapid installation.
3Ease of manufacture
If the stairwell facade is removed to install the elevator system, then elevator installation is enabled, but structural integrity and supply line protection are compromised
Solution Approach 1:
The foundation frame is segmented into modular components that can be assembled in sections. This segmentation allows for controlled removal and installation operations that protect supply lines and maintain structural integrity while enabling elevator installation.
Solution Approach 2:
The foundation frame acts as a protective intermediary structure during installation. It provides a stable platform that protects underlying supply lines and maintains structural integrity while facilitating the elevator installation process.
Data Source
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AI summary
The invention relates to a method for retrofitting a multi-story building 1 with an elevator system 41, wherein the building has a stairwell 5 with main landings 6, 6.1, 6.2... and intermediate landings 12, 12.1, 12.2... for a double-flight staircase, comprising the method steps: a) installing a foundation 15 for a prefabricated elevator system 41, b) opening the front of the building, c) removing the intermediate landings and at least parts of the double-flight staircase, d) installing walkways 32 in the stairwell extending horizontally from the main landings to the front of the building, e) installing single-flight staircases 31, f) erecting a prefabricated elevator system 41 provided with elevator landings 42 onto the foundation 15, and/or f') installing or attaching elevator landings 42 that are connected to the walkways 32 or are associated with theseand g') erecting the prefabricated elevator system 41 on the foundation 15 and attaching the elevator system to the elevator platforms 42, wherein h) before process step (a) the geometric dimensions of the stairwell 5 are measured, i) before process step (a) a foundation frame 16, which contains mounting points or receptacles for the prefabricated elevator system 41, is prefabricated according to the dimensions of the stairwell, and j) the prefabricated foundation frame 16 is used in process step (a) at least as part of the foundation 15.