DASMA TDS 151 - General Code Inspection Guidelines for Sectional Garage Doors

When a building inspector visits a garage door installation, they are working from a set of specific checkpoints. DASMA TDS 151 documents those checkpoints so installers and homeowners know exactly what will be reviewed before the inspector arrives.

What this data sheet says

TDS 151 summarizes the code requirements an authority having jurisdiction (AHJ) typically verifies during a final inspection of a sectional garage door installation. The sheet covers four main areas: labeling, structural hardware, the automatic operator, and safety devices.

"Inspectors should verify that the door has been installed according to the manufacturer's installation instructions and that all required labels are in place."

Key items the sheet highlights include:

• Permanent labels must be affixed to the door confirming the design wind pressure rating and model information.
• Hardware such as hinges, rollers, springs, and cables must match the door manufacturer's specifications for the installed door size and weight.
• Operator installation must follow the manufacturer's instructions, and the operator must carry a listing from an approved testing laboratory (UL 325 listing is the standard reference).
• Entrapment protection devices including photoelectric sensors and the auto-reverse function must be tested and operational.
• Jamb and header attachment must be adequate for the loads the door will experience.

When it applies

TDS 151 applies any time a garage door installation requires a building permit and a final inspection. In practice that means:

• Full replacement of a residential sectional door in Denver and most Front Range jurisdictions. Denver Community Planning and Development (CPD) requires a permit for a complete door swap in most cases.
• New construction where the garage door rough opening and the door itself are inspected as part of the shell inspection.
• Structural reinforcement projects such as adding a wind-rated door in a hurricane or high-wind zone, where the inspector needs to verify the door's pressure label matches the engineering requirement.

Even in jurisdictions where a routine like-for-like panel repair does not need a permit, TDS 151 is useful because it describes the baseline that any properly installed door should already meet.

What this means for you

Check for labels before calling for inspection. The most common reason a garage door inspection fails is a missing or illegible wind-pressure label. Confirm the label is on the door (usually on an interior stile) before the inspector shows up.

Bring the installation instructions. Some inspectors ask to see the manufacturer's installation guide to confirm the hardware configuration matches what the instructions require. Keep a copy in the garage.

Test the auto-reverse before inspection. Place a 2x4 flat on the floor in the door's path and close the door. The door should reverse when it contacts the board. Test the photoelectric sensors by breaking the beam while the door is closing. Both tests should pass before the inspector arrives.

In Denver, if your installation requires a permit and you skip the inspection, you may need to open walls or remove the door later to prove compliance. Getting it done at the time of installation is simpler and protects you at resale.

G Brothers pulls permits and schedules inspections on jobs that require them, so the paperwork does not fall to the homeowner.

Full text and source

Download DASMA TDS 151 from the official TDS index at https://www.dasma.com/technical-data-sheets/.

This entry covers residential and light-commercial sectional garage doors. Rolling steel doors, fire doors, and specialty commercial doors may be subject to additional inspection requirements beyond TDS 151.