Building Code Requirements Regarding the Use of Fire Retardant Treated Lumber in Floor/Ceiling and Roof/Ceiling Assemblies Bearing on Exterior Walls of Type III Buildings
DrJ provides engineering and related services specializing in light-frame construction.
- Professionally Engineered Solutions
- Code Compliance Evaluations
Structural engineering services are not currently offered in Illinois.
DrJ is an ISO/IEC 17065 accredited product certification body through ANSI Accreditation Services.