DASMA TDS 1502 - IRC R609.4.1 Wind Load Labels on Garage Doors

Every IRC-compliant garage door must carry a permanent label showing its wind load rating. DASMA TDS 1502 explains what that label must say, how to read it, and what it means when a building inspector asks for it.

What this data sheet says

DASMA TDS 1502 explains the labeling requirement established in IRC R609.4.1. Under this section, every sectional garage door must have a permanent label listing the door's rated design pressure in pounds per square force (psf). The label must be affixed to the door and remain legible throughout the door's service life.

"IRC R609.4.1 requires that each garage door be labeled with the door's rated design pressure in psf (positive and negative), the applicable test standard, and the manufacturer's name."

TDS 1502 walks through what each element on the label means:

• Positive design pressure (psf): the inward pressure the door can resist (wind pushing the door in from outside). This is typically the larger of the two values.
• Negative design pressure (psf): the outward suction force the door can resist (wind pulling the door outward, which is the more common failure mode in high-wind events).
• Test standard: the test method used to establish the rating, most commonly ANSI/DASMA 108 (static pressure test) or ANSI/DASMA 115 (missile impact plus cyclic pressure, for windborne debris regions).
• Manufacturer name and model: identifies the specific door product and the configuration the rating applies to.

The TDS also explains that the label applies to a specific door configuration. If struts, track gauge, or hardware are changed from the tested configuration, the label's rated pressure may no longer apply to the modified door.

When it applies

The IRC R609.4.1 label requirement applies to every residential garage door sold and installed in an IRC-adopting jurisdiction. Every major Front Range municipality (Denver, Aurora, Arvada, Lakewood, Thornton, and most others) has adopted a version of the IRC.

Building permit inspections in Denver include verification that the installed door's label rating meets or exceeds the site's required design pressure. A door without a legible label, or with a rating below the site requirement, is a failed inspection point.

Insurance claims after a wind event sometimes turn on whether the door met the required rating. A door with a legible wind load label that equals or exceeds the local design pressure, installed per its rated configuration, is in a much stronger position for a coverage discussion than one without documentation.

What this means for you

Find and photograph the wind load label on your current door. It is usually on the inside face of the top or second section, or on the side jamb area. Knowing the rated psf and test standard helps you compare it to your local design requirement.

When buying a replacement door, confirm the rated psf before committing. Ask the dealer for the psf rating and the test standard. A "wind rated" label without specific numbers is not sufficient documentation for a permit submittal.

Do not cover or remove the label. Paint, stickers, or weatherstripping applied over the label can make it unreadable. An unreadable label is treated as no label for inspection purposes.

G Brothers can verify your door's existing wind load rating and provide pressure documentation for any door we install across the Denver metro area and Front Range.

Full text and source

Download DASMA TDS 1502 from the official TDS index at https://www.dasma.com/technical-data-sheets/.

This entry covers IRC R609.4.1 wind load labeling for residential sectional garage doors. Commercial garage doors under the IBC have separate documentation requirements through IBC Chapter 16 and ASCE 7.