Truss Seat Anchor Strap Assembly Hurricane Resistance
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Solution Overview
Problem
Existing truss seat and anchor assemblies fail to securely anchor roof trusses to concrete walls during hurricanes due to upward forces, leading to disconnection and potential wood material fracture, and often require additional supplies on-site, causing delays.
Innovation Solution
The truss seat and anchor assembly features a channel length with angularly-related embedment legs and pre-attached anchor straps to the channel, providing increased surface area and resistance to movement, ensuring secure anchoring and preventing delays by minimizing the need for additional supplies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If two anchor straps are used to resist upward forces, then the resistance to hurricane forces is improved, but the complexity of the assembly increases and requires additional supplies on-site
Solution Approach 1:
The patent combines two anchor straps and a channel length into a single pre-assembled unit, merging multiple components that would otherwise need to be supplied and installed separately. This reduces assembly complexity on-site while maintaining the strength benefits of multiple anchor straps.
Solution Approach 2:
The anchor straps are pre-attached to the channel length at predetermined positions before reaching the job site. This preliminary assembly ensures proper spacing and configuration are achieved without requiring additional supplies or complex coordination during installation.
2Productivity
If anchor straps are pre-attached to channel length at predetermined positions, then productivity is improved by avoiding job shutdowns, but the manufacturing complexity increases
Solution Approach 1:
The anchor straps are pre-attached to the channel length at predetermined positions during manufacturing, eliminating the need for on-site measurement and installation of multiple separate components. This preliminary assembly improves installation speed while the standardized process keeps manufacturing complexity manageable.
Solution Approach 2:
The channel length serves multiple functions: it provides structural support, acts as a mounting platform for multiple anchor straps, and serves as a transport unit. This multi-functionality consolidates several components into one, improving productivity without proportionally increasing manufacturing complexity.
3Strength
If spaced anchor straps are used to prevent wood material fracture, then the strength is improved, but the device complexity increases
Solution Approach 1:
The channel length provides localized support at specific positions where anchor straps are attached, concentrating strength where needed. This localized quality approach prevents wood material fracture at critical points without requiring complex configurations throughout the entire assembly.
Solution Approach 2:
The predetermined spacing of anchor straps on the channel length is established during manufacturing, ensuring optimal positioning for preventing wood material fracture. This preliminary configuration eliminates the need for complex on-site calculations and adjustments.
Data Source
AI summary
A seat and anchor assembly for mounting and securing a wood joist or roof truss to a tie beam of a building including a central web portion and an upwardly extending wall portion disposed along a longitudinal edge thereof wherein a lower portion of the roof truss or joist fits within what may be considered a seat defined by the web and the upstanding wall portion. An elongated anchor strap is adjustably attached to the wall portion and is adapted to be secured by nails or like connectors to the top portion of the roof truss and further wherein the anchor strap includes a lower length disposed and adapted to be embedded in wet concrete initially defining the tie beam of the building on which the seat and truss rests.