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DuroSPAN S-Model 25x30x14 Steel Arch Building Kit — Clear Span Garage or Workshop | Factory Direct | END WALLS INCLUDED

The DuroSPAN S-Series Steel Arch Building is a versatile, clear-span steel building kit engineered for residential, commercial, agricultural, and industrial applications. Whether used as a garage, workshop, equipment storage building, RV or boat storage facility, commercial shop, or warehouse, the S-Series delivers long-lasting strength, flexibility, and value.

Popular among commercial and industrial shop owners, farmers, truckers, RV and boat owners, the S-Series steel building is designed to protect valuable assets — from passenger vehicles and farm equipment to fleet trucks, trailers, and heavy machinery. Its clear-span arch design eliminates interior columns, maximizing usable interior space and allowing for flexible layouts and future expansion.

Available in widths ranging from 16 ft to 60 ft, with unlimited building lengths, the DuroSPAN S-Series can be customized to meet a wide range of project requirements. DuroSPAN's main office is located in the United States, these prefabricated galvanized steel buildings are highly economical, corrosion-resistant, and engineered for durability in demanding environments.

The S-Series steel arch building is ideal for low-maintenance workshops, storage facilities, retail spaces, warehousing, agricultural buildings, offices, and even cottage-style structures, offering a reliable, long-term building solution with minimal upkeep.

Ideal Applications Include:

Steel Garage or Multi-Car Garage
Commercial & Industrial Workshops
Agricultural & Farm Equipment Storage
RV, Boat & Trailer Storage
Warehousing & Light Manufacturing
Retail Spaces & Office Buildings

Key Specs

Size: 25' Width × 40' Length × 14' Height
Front End Wall : 1 Solid End Wall or Choice of Framed Opening Opening (doors not included)
Rear End Walls: 1 Solid End Wall or Choice of Framed Opening Opening (doors not included)
Material: 22 GA Galvalume Plus® (7× more rust resistant than galvanized)
Loads: 128 MPH wind / 39 lb. snow (adjustable for local codes)

Special Features

All deluxe hardware included. no special tools needed
Pre formed, pre cut, pre drilled components
All steel and fire resistant
Warranties: 50 Year Factory Backed Rust and Corrosion Warranty

Assembly:

The DuroSPAN S-Series Steel Arch Building features a 100% clear-span design, providing unobstructed interior space with no interior columns, poles, or beams. This maximizes usable square footage and allows for flexible layouts for vehicles, equipment, workshops, and storage.

Each building kit is shipped with a step-by-step assembly manual designed for efficient and straightforward installation. The modular steel arch system allows for fast construction, and buildings can typically be erected by a small crew using minimal equipment, reducing labor costs and installation time.

DuroSPAN buildings are engineered for DIY-friendly assembly while remaining suitable for professional installation. A full range of optional accessories, including insulation systems, end-wall components, doors, and building upgrades, is available to customize your structure. Visit our eBay store for compatible accessories and additional building options.

Manufacturing:
The DuroSPAN S-Series Steel Arch Building is a highly versatile, manufactured prefabricated steel building system designed for commercial, industrial, agricultural, and residential applications. Each building is custom-engineered to your project specifications, including local wind and snow load requirements, and is designed to meet or exceed industry standards and regional building codes.
Manufactured using high-quality galvanized steel, DuroSPAN buildings are engineered for durability, efficiency, and long-term performance. The clear-span arch design allows for wide, open interiors with minimal structural limitations, making these buildings ideal for garages, workshops, equipment storage, warehouses, agricultural facilities, RV and boat storage, and light commercial use.
As a proven pre-engineered steel building system, DuroSPAN structures are designed for fast installation, long service life, and low maintenance. A wide range of color options, configurations, and building upgrades are available, allowing each building to be tailored to functional and aesthetic needs while remaining cost-effective and structurally efficient.

Engineering drawings and calculations available upon request for permitting and approval.

About Us | U.S.-Based & Family Owned
Duro Steel Buildings is a U.S.-based, family-owned company with nearly 30 years of experience providing high-quality steel buildings for residential, commercial, and industrial use. We have proudly served customers on eBay since 2001, making us the longest-standing steel building seller on the platform.

From garages and workshops to warehouses and agricultural buildings, Duro delivers customizable, engineered steel structures backed by expertise, reliability, and customer-focused service.

DuroSPAN S-Model 25x30x14 Steel Arch Building Kit — Clear Span Garage or Workshop | Factory Direct | END WALLS INCLUDED

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