Joist Pocket Assembly for Refrigerated Facility Thermal Insulation
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Solution Overview
Problem
Refrigerated facilities face challenges in maintaining effective temperature control, moisture barrier, and thermal insulation at joist-wall intersections, leading to thermal insulation loss, moisture penetration, and ice buildup, which increases energy consumption and structural damage.
Innovation Solution
A joist pocket assembly is introduced, featuring a frame mounted within a wall cut-out with a base to receive a structural member, a flange to cover gaps, and studs for securement, along with insulation layers and sealants to create a continuous vapor and moisture barrier, reducing the need for detailed sealing work.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional joist mounting methods are used in refrigerated facilities, then installation is simpler, but thermal insulation is compromised and moisture penetration occurs
Solution Approach 1:
The joist pocket assembly is divided into distinct functional components: an outer pocket structure receiving the joist, an inner vapor barrier assembly, insulation layers, and sealing flanges. This segmentation allows each component to address specific requirements (structural support, vapor protection, thermal insulation) while working together to eliminate thermal bridges and moisture penetration paths.
Solution Approach 2:
The joist pocket assembly acts as an intermediary element between the joist and the refrigerated facility wall. It provides a transition structure that maintains the vapor barrier continuity, accommodates the joist structurally, and prevents direct contact that would create thermal bridges, thereby protecting the facility envelope.
2Reliability
If detailed sealing work is performed at joist-wall intersections, then moisture barrier is improved, but installation time and labor increase
Solution Approach 1:
The vapor barrier and sealing components are pre-assembled into the joist pocket structure during manufacturing. The flanges are pre-positioned to align with the pocket opening, and sealing surfaces are pre-prepared, eliminating the need for field sealing operations and reducing installation to simple mechanical assembly.
Solution Approach 2:
The design of the joist pocket assembly with integrated flanges and pre-positioned vapor barrier components allows the structure to self-seal at the joist-wall intersection. The components work together to automatically maintain vapor barrier continuity without requiring additional sealing materials or skilled sealing operations.
3Reliability
If insulation is installed on exterior of structural frames, then thermal insulation is provided, but vapor barrier continuity is compromised at intersections
Solution Approach 1:
The joist pocket assembly merges the structural joist support function with the vapor barrier and thermal insulation functions into a single integrated assembly. The pocket structure itself serves as the vapor barrier substrate, insulation is integrated within the pocket structure, and the assembly maintains continuity with the facility envelope, eliminating the need for separate treatments.
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
The joist pocket assembly enhances thermal insulation, prevents moisture and vapor penetration, and reduces ice formation, thereby improving energy efficiency and structural integrity by providing a continuous barrier and eliminating the need for extensive detail work at joist intersections.
Implementation Method 1
an insulation layer disposed on an outside portion of the frame, where the insulation layer can be located between the frame and the wall
Implementation Method 2
a sealant disposed between the joist pocket assembly, the wall and the wall membrane, where the sealant can bond the wall membrane to the joist pocket assembly and the wall
Data Source
AI summary
A joist pocket assembly and a method for manufacturing a joist pocket assembly is described herein. In some embodiments, the joist pocket assembly can include a frame configured to be mounted within a cut-out in a wall. In some embodiments, the joist pocket assembly can include a base of the frame, where the base can be configured to receive a structural member of a joist. In some embodiments, the joist pocket assembly can include a flange extending from a perimeter of the frame, where the flange can cover a gap between the frame and the wall. In some embodiments, the joist pocket assembly can include a first stud coupled to the base of the frame, where the first stud can secure the frame to the wall. In some embodiments, the joist pocket assembly can be placed in a concrete tilt wall or concrete precast wall.