DASMA Technical Data Sheets: What They Are and Which Ones Homeowners Should Read

What DASMA Technical Data Sheets are

DASMA is the Door & Access Systems Manufacturers Association, the trade group for makers of garage doors, rolling doors, high performance doors, operators and gates. Its index page says DASMA keeps writing the sheets to explain technical issues with members’ products.

They are meant for buyers, users, installers and specifiers ¹. It also says the sheets are not substitutes for manufacturers’ instruction sheets and that users should consult manufacturers and local regulations ¹.

Each sheet is a short PDF with a number and a revision history. Every sheet we used for this glossary carries the line that it is reviewed periodically and may be updated, with a pointer to dasma.com for the latest version ⁷.

How the sheets are organized

The index groups the sheets into four families: Commercial & Residential Garage Doors, numbered from 151 up and including the 1500s; Rolling Doors from 251 up and including the 2500s; Operator & Electronics from 350; and High Performance Doors from 451 ¹.

The garage door group also includes regional versions of the wind load guide, TDS-155 ¹.

Within each family the sheets range from terminology lists to test explanations, code guidance, installation details and owner checklists.

Numbers follow the order sheets were created rather than topic, so the index or a search is the fastest way to find one. Some sheets carry more than one number because they cover several door types.

The sheet on the environment, for example, has numbers for sectional, rolling and high performance doors ¹⁶.

Sheets most useful to homeowners

Example: matching a problem to the right sheet

A few common homeowner questions and the sheet that answers them, from sheets cited across this glossary.

Each sheet is short enough to read in a few minutes, and most of this glossary’s definitions cite them directly.

Where the sheets are used

Home inspectors use the residential checklist, which DASMA wrote recognizing the safety role of inspectors ¹¹. Architects and specifiers use guide specifications and test explanations, such as the high performance door guide specification ³⁴.

Installers use framing, mounting and installation sheets, such as the guidance on connecting jambs to building framing ⁸ and on mounting hardware over drywall ¹⁰. Code officials use the wind and inspection guidelines.

Most homeowners need only a few: terms, the checklist, the damage and spring sheets. The ones on insulation, bowing and condensation help settle common disputes with dealers.

Technical Data Sheets vs ANSI/DASMA standards

Technical Data Sheets explain; standards set test methods and requirements.

The sheets often point to the standards that actually govern performance: ANSI/DASMA 105 for U-factor ²⁰, ANSI/DASMA 108 for wind ⁴, ANSI/DASMA 109 for door cycle life ¹⁶, ANSI/DASMA 107 for foam room fire tests ⁵ and ANSI/DASMA 103 for counterbalance components ⁴.

Federal rules sit above both. For residential openers, 16 CFR 1211 incorporates UL 325 entrapment requirements ³⁷, which DASMA’s operator sheets explain for dealers and owners ³².

The safety message in every sheet

A thread runs through the sheets: springs and related parts are under high tension, and repairs and adjustments belong to trained door systems technicians.

The home checklist says not to remove, repair or adjust springs or other door parts ¹¹. The damage sheet tells occupants the same ¹².

The rolling door sheet warns that its springs are under extreme tension at all times ²³.

Inside the garage door family

The garage door sheets cover the whole life of a door. Terminology comes first, in TDS-160 ⁷.

Buying and performance topics include the metal gauge chart ⁴, R-value and U-factor ⁹, the thermal verification program ²⁰, sound transmission ¹⁷, foam plastics and fire rules ⁵ and glazing ⁶.

Wind topics include high wind events ², vertical reinforcement ³, the regional wind load guides and effective wind area ¹³.

Installation sheets cover jamb connections ⁸, drywall mounting ¹⁰ and jackshaft operation on standard-lift doors ²². Owner topics include the inspection checklist ¹¹, damage checks ¹², spring cycle life ¹⁸, thermal bowing ¹⁵, condensation ¹⁹ and water under the door ²¹.

Rolling, operator and high performance sheets

The rolling door family covers terminology ²⁵, counterbalancing, which works differently from a sectional door because the curtain’s pull changes as it coils ²⁴, maintenance practices for building supervisors ²³, and fire door topics such as standards and NFPA 80 questions ^{27 26}.

The operator family covers terminology ²⁸, legislation guidance for dealers ²⁹, photo-eye placement ³⁰, edge sensors ³¹ and owner questions about automated systems ³².

The high performance family covers terminology ³³, a guide specification ³⁴, energy savings from high speed doors ³⁵ and how UL 325 applies to them ³⁶.

Tips for reading a sheet

Check the date block at the foot of each page first. Sheets show a trail of revisions and reaffirmations, and the most recent date tells you how current the guidance is; DASMA prints that each sheet is reviewed periodically and may be updated ⁷.

If a sheet cites a code edition, compare it with the edition your area has adopted.

For example, the operator FAQ sheet TDS-369 lists its first issue in August 2002 and revisions in June 2012, April 2016 and April 2020 ³².

A sheet that old can still be current, but check the cited code editions against what your town uses.

Read the introduction and any notes or warnings before the tables. Many sheets open with a scope statement that says what the sheet does not cover, such as the water sheet that excludes jambs and header and covers only the bottom of the door ²¹.

And follow the references: when a sheet points to an ANSI/DASMA standard or another sheet, that is usually where the detailed answer lives.

How this glossary uses the sheets

Most definitions on HyreGarage glossary pages quote or paraphrase a DASMA sheet and link to it in the sources list with the date we retrieved it.

Where a sheet and a manufacturer disagree, we say so and point you to the maker’s instructions for your door, as DASMA itself advises ¹.

Where a sheet gives a number, such as photo-eye height or gauge thickness, we quote it rather than rounding or restating it.

If you spot a sheet that has been revised since our retrieval date, the newer version wins. Use the links to download the current sheet before relying on it for a purchase, an inspection or a dispute.

Strengths and limits

Limits

The sheets are general. They tell you what the industry considers normal and safe, not what your specific door requires; for that, use the maker’s instructions ¹. Code sheets cite set code editions.

Your town may use a different one, so check with the building department. Sheets are revised, so always download the latest version before relying on one.

Access

The index links each sheet as a PDF ¹.

• Format: short PDFs, usually 1–5 pages.
• Updates: each carries a revision date.
• Companions: DASMA also links wind load calculators from the index ¹.

How to use DASMA sheets

1. Start with TDS-160 to learn the part names ⁷.
2. Run the TDS-167 checklist on your door ¹¹.
3. Look up the specific issue: springs, bowing, condensation, R-value.
4. Check the revision date and download the latest version ⁷.
5. Follow the maker’s instructions where they differ ¹.

Sheets for upkeep

• TDS-167: annual checklist ¹¹.
• TDS-174: after severe weather ¹².
• TDS-179: wood door finishing and inspection ¹⁴.
• TDS-270: rolling door maintenance practices ²³.

Using the sheets safely

Use the sheets to recognize problems and stop at the point they tell you to stop. The checklist’s instruction is clear: if any answer is no, stop the inspection and contact a trained door systems technician ¹¹.

Status

The sheets are industry guidance, not law. They become relevant to code and contracts when a code or specification references the standards they explain, such as ANSI/DASMA 105 in the IECC ²⁰ or UL 325 in 16 CFR 1211 ³⁷.

TDS vs maker manual

Myths

Myth DASMA sheets are building codes.

Reality They are guidance ¹.

Myth They replace the installation manual.

Reality DASMA says they do not ¹.

Myth They never change.

Reality Each is reviewed periodically ⁷.

Regional sheets

Bottom line

Bookmark the terminology sheet and the checklist, and use the rest to settle specific questions. Then follow your maker’s manual and call a technician for repairs. See preventive maintenance.

Related terms

Preventive Maintenance

Preventive maintenance is the routine inspection, testing, cleaning and lubrication of a garage door and opener on a schedule, so that wear is caught early and the door stays balanced, safe and reliable.

Garage Door System

A garage door system is the complete working assembly of a garage door: the door sections, tracks and rollers, the spring counterbalance with its cables and drums, and, if fitted, the opener and its safety devices.

UL 325 Safety Standard

The UL 325 safety standard is UL’s rulebook for door, drapery, gate, louver and window operators, and its entrapment rules for garage door openers are part of U.S.

U-Factor

A garage door U-factor is the measured rate of heat flow through a complete installed door, including sections, joints, hardware and seals, tested under ANSI/DASMA 105; the lower the U-factor, the less heat the door lets through.

Garage Door Spring Cycle Life

Garage door spring cycle life is the number of full open-and-close cycles a spring is rated to complete before metal fatigue is expected to break it.

Also referenced from: Entrapment Protection, UL 325 Safety Standard, Wind Load, Impact Resistance, Wind-Bracing System, Fire-Rated Rolling Door, Product Approval