Fall Arrest Anchor Socket With Lateral Tensile Members
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Solution Overview
Problem
Conventional fall arrest anchors embedded in concrete slabs face issues such as damage to the concrete, inadequate pull-out resistance, and limited lateral strength due to insufficient surface area and material properties, as well as design limitations that do not accommodate varying concrete depths.
Innovation Solution
A post anchor system comprising a socket with a jacket member and tensile members that distribute forces into the surrounding concrete, allowing for adjustable height to fit different slab depths and providing enhanced structural support through a combination of a sleeve portion, base portion, and tensile members that engage the concrete and rebar for improved stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional embedded anchoring sockets are used in concrete slabs, then the anchor can be installed, but the socket will crack or pullout under load creating a safety hazard
Solution Approach 1:
The anchoring system is divided into multiple components: a socket portion embedded in concrete, a barrier member receiving portion, and multiple reinforcing bars extending from the socket. This segmentation allows each component to perform its specific function - the socket provides positioning, while the distributed reinforcing bars provide the necessary pullout resistance without concentrating stress in one location.
Solution Approach 2:
The reinforcing bars extend laterally outward from the socket in multiple directions rather than just vertically. This dimensional expansion distributes the load across a larger volume of concrete, increasing pullout resistance by engaging the concrete's strength in multiple spatial dimensions rather than relying solely on the socket's embedded depth.
2Strength
If anchor bolts are used to secure posts to concrete slabs, then the post can be firmly anchored, but the concrete slab and reinforcing bars may be damaged during installation
Solution Approach 1:
The socket and reinforcing bar assembly is pre-assembled as a complete unit before installation. The reinforcing bars are positioned and secured to the socket in advance, allowing the entire anchoring system to be installed as one piece. This eliminates the need for on-site drilling and bolting operations that could damage the concrete and existing reinforcing bars.
Solution Approach 2:
The socket acts as an intermediary component that receives the barrier member (post) and transfers loads to the reinforcing bars, which then distribute forces to the concrete. This intermediary structure eliminates direct contact between the post and concrete, preventing damage during installation and use.
3Ease of operation
If conventional cup or sleeve inserts are used in concrete slabs, then the anchor can be installed, but they lack sufficient surface area to provide adequate pullout resistance for high loads
Solution Approach 1:
The reinforcing bars extend laterally outward from the socket in multiple directions, dramatically increasing the surface area engaged with the concrete. This lateral extension in horizontal dimensions complements the vertical embedding depth, creating a three-dimensional distribution of anchoring points that provides high pullout resistance while maintaining installation simplicity.
4Adaptability or versatility
If conventional embedded anchoring sockets are used, then the anchor can be installed, but they do not accommodate varying concrete slab depths
Solution Approach 1:
The socket is designed with a configurable reinforcing bar system that can be adjusted based on the concrete slab depth. The number, length, and arrangement of reinforcing bars can be modified to match different slab thicknesses, allowing the same basic socket design to adapt to varying installation conditions without requiring completely different socket designs.
Data Source
AI summary
A post anchor is provided for securing a post within a poured concrete slab. The post anchor comprises a socket having a first cavity sized to receive the post therein. A jacket member is adapted to mount over at least a portion of the socket. At least one tensile member is mounted to, and extending from, the jacket member. The jacket and tensile members function to reinforce the socket and to distribute any forces exerted upon the post anchor further into the surrounding concrete. The socket may be provided in a variety of heights, to allow the post anchor to be easily adapted to a variety of slab depths.