DrJ Engineering

DrJ Engineering DrJ Engineering is both a full-service structural engineering firm specializing in light-frame const

Congratulations to Stark Truss Company, Inc. on their new DrJ Listing 2502-121: “Stark Truss Floor Truss to Rated Wall I...
04/21/2026

Congratulations to Stark Truss Company, Inc. on their new DrJ Listing 2502-121: “Stark Truss Floor Truss to Rated Wall Intersection Designs for Type IIIA Construction.”
https://www.drjcertification.org/dl/2502-121

Congratulations to Chemical Technologies Holding Corporation on their new DrJ Listing 2510-122: “Use of Chemical Technol...
12/11/2025

Congratulations to Chemical Technologies Holding Corporation on their new DrJ Listing 2510-122: “Use of Chemical Technologies Holding Corporation’s TechWood 4400 Lumber Products in Fire-Rate Wall Assemblies.”
https://www.drjcertification.org/dl/2510-122

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6300 Enterprise Lane
Madison, WI
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