ANSI/DASMA 207 - Standard for Rolling Sheet Doors

A rolling sheet door is different from a rolling steel door. Rolling steel doors have interlocking slats. Rolling sheet doors are made from a single continuous sheet of metal that coils above the opening. They are the standard product for self-storage units and light commercial applications. ANSI/DASMA 207 governs them.

What this standard says

ANSI/DASMA 207-2020 is the current edition of the product standard for rolling sheet doors. The 2020 edition updated previous versions to reflect current material and construction practices.

"This standard establishes minimum requirements for the construction, materials, and performance of rolling sheet doors, including sheet metal specifications, guide and barrel design, and structural performance requirements."

Key provisions include:

Sheet material. The door curtain is a continuous sheet of steel or aluminum. ANSI/DASMA 207 sets minimum thickness requirements and allowable alloys. Galvanized steel and aluminum are the most common materials in Colorado's climate.

Coil system. The barrel must be sized to handle the weight of the curtain and the stress of repeated coiling without permanent deformation. The standard sets barrel diameter requirements relative to curtain width and weight.

Guide system. Guides on each side of the opening must retain the curtain under design loads. Rolling sheet curtains can peel away from guides under wind load if the guides are undersized.

Structural performance. ANSI/DASMA 207 sets design pressure requirements based on opening size. These align with the wind-load methodology used for commercial construction.

When it applies

Self-storage facilities. Most self-storage units use rolling sheet doors. Owners purchasing replacement doors for a facility should confirm the doors meet ANSI/DASMA 207 to ensure consistent performance across the property.

Light commercial applications. Small commercial spaces sometimes use rolling sheet doors for cost reasons. The lower profile and simpler construction make them appropriate for light-duty use. For heavy-duty commercial applications with frequent cycling, rolling steel (ANSI/DASMA 203) or high-performance doors (DASMA 402 or 403) are more appropriate.

Wind load compliance. Denver's commercial wind design requirements apply to rolling sheet doors in commercial occupancies. The designer must confirm the door's rated design pressure meets the building's wind-load requirements for the opening size.

Replacement in existing facilities. When one rolling sheet door in a row of identical units fails, the replacement door must match the curtain thickness and guide configuration of the others. ANSI/DASMA 207 specs help verify compatibility.

What this means for you

For self-storage owners in Denver: specify ANSI/DASMA 207 compliance in your replacement door contracts. This sets a minimum standard and gives you documentation for insurance and lending purposes.

Understand the duty-cycle limits. Rolling sheet doors are designed for light-to-moderate use. A self-storage unit accessed a few times per week is within the design envelope. A door cycled 20 times per day needs a higher-duty product per ANSI/DASMA 203 or DASMA 402.

Denver's temperature range affects sheet doors. Steel sheet curtains can buckle slightly when temperature changes cause differential expansion between the curtain and the coil. This is normal and ANSI/DASMA 207 addresses material requirements that minimize the effect.

G Brothers installs and services rolling sheet doors for self-storage and light commercial customers in the Denver metro area and can confirm ANSI/DASMA 207 compliance for any door we supply.

Full text and source

ANSI/DASMA 207-2020 is available at https://www.dasma.com/wp-content/uploads/2021/02/ANSIDASMA2072020.pdf.

ANSI/DASMA 207 covers rolling sheet doors only. Rolling doors with interlocking slat curtains are governed by ANSI/DASMA 203. Rolling grilles (open-weave curtains for storefronts) are governed by ANSI/DASMA 208.