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Engineered Drawings for TWIA and TDI Submissions

ALFA Engineering, LLC prepares sealed engineered drawings and wind load calculations that support TDI windstorm documentation requirements for buildings in designated Texas catastrophe areas. Our licensed professional engineers deliver the structural documentation needed for submission and insurer compliance.

Scope of Services

  • Preparation of PE-sealed engineered drawings meeting TDI windstorm documentation requirements
  • Wind load calculations per ASCE 7 for buildings in designated catastrophe areas
  • Foundation, framing, and connection details suitable for TDI submission
  • Review and modification of existing engineering drawings for TDI compliance
  • Documentation package assembly for TDI and insurer submission support

Typical Deliverables

  • PE-sealed engineered drawings with wind load details
  • Structural calculations and load analysis reports
  • Foundation and framing plans with connection schedules
  • General structural notes for catastrophe-area compliance
  • Documentation package organized for TDI submission

Project Types We Support

New residential and commercial construction in catastrophe areas
Additions and modifications to existing buildings in designated zones
Re-roofing and exterior renovation projects requiring windstorm documentation
Pre-engineered metal buildings needing wind load certification
Completed construction requiring WPI-8E evaluation drawings

Inspection authority and certificate limits

ALFA Engineering, LLC is a Texas-licensed professional engineering firm providing windstorm engineering, project review, and certification-process support for qualifying residential and commercial projects in designated coastal areas. Availability depends on the property address, construction stage, and agreed scope.

For ongoing WPI-8 construction, ALFA can review the scope, help identify the applicable inspection path, and coordinate engineering documentation. An official construction-stage inspection must be performed by a TDI windstorm inspector or a Texas professional engineer holding the required current TDI appointment. ALFA does not claim an active TDI appointment; authorized inspection services are available only where the assigned engineer's required appointment is verified before scheduling.

Completed construction follows the separate WPI-8E evaluation and documentation process. Concealed work may not be verifiable. TDI reviews submissions and issues the certificates; ALFA does not issue certificates or guarantee eligibility, approval, insurance coverage, or review times.

Review official TDI inspection and certificate requirements

Frequently Asked Questions

Need Engineered Drawings for TDI Submission?

Contact ALFA Engineering to discuss your windstorm documentation needs, or check your property address with ALFAP TX to confirm your catastrophe-area status first.