The Holy Grail of Passive House Ledger Connection
At EVstudio, we continuously seek innovative solutions for structural challenges. When we set out to engineer a residential project using a Passive House system, we needed a ledger connection that maintained insulation integrity. The SIMPSON BVLZ brick veneer ledger connector seemed promising, but we had questions. Could it work within our project constraints while preserving the Passive House certification?
We reached out to Simpson Strong-Tie, and their response was immediate and insightful. They provided a detailed breakdown of the requirements and confirmed that our 4 ¾” gap met the minimum threshold for the connector’s compression strut engagement. To meet this requirement, we implemented a 3-ply ledger, as shown in the detail below. Additionally, they clarified that the BVLZ testing was based on a 2x solid-sawn rim, requiring a minimum thickness of 1.5″ to ensure full structural performance.
Collaboration
This collaboration with Simpson Strong-Tie led us to what feels like the “Holy Grail” of Passive House ledger connections. By using the BVLZ connector, we not only achieved a secure attachment but also preserved the continuous insulation necessary for Passive House compliance.
Through this process, we reinforced the power of partnership. Simpson’s expertise and quick support helped us push the boundaries of structural engineering. At EVstudio, we remain committed to finding innovative, code-compliant solutions that elevate our projects and benefit our clients.
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