Duvinage

What Duvinage does

Duvinage LLC is a Hagerstown, Maryland-based custom metal stair manufacturer that has operated continuously since its 1895 founding in New York City by Pierre Duvinage, who patented the first spiral metal staircase in the United States. The company designs, engineers, and fabricates every category of metal stair — spiral, circular/monumental, straight, alternating tread, ships ladders, and modular kits — from a single facility and bills itself as the only American firm with that full vertical scope. Through its Sharon Stairs division (acquired from Worthington Industries in 2012), Duvinage also supplies pre-engineered Drop-In™ egress stair systems that meet IBC, NFPA 101, and ADAAG codes at a claimed 30–40% cost advantage over site-built stairs.

The company's commercial activity is split across two go-to-market motions: a B2B project-based model for custom and modular engineered stairs sold through Proposal Contracts via a national independent sales-representative network covering all 50 U.S. states and International markets, and a direct-to-consumer e-commerce channel on duvinage.com for the Chicago KS60 spiral stair kit family (primered, black, white, custom-paint, galvanized, and deck variants) with transparent riser-tiered pricing from $2,899.99 to $8,179.99. Customers span residential homeowners, architects and designers, commercial contractors, and industrial planners; marquee installations include the White House, the National Gallery of Art, Yale University, the Ritz Carlton, the Venetian, the Javits Center, and the George Washington Bridge.

Duvinage has been wholly owned by Key Bridge Partners, a private investment firm, since 2007 and operates as an 11–50 employee specialty manufacturer. Product technology centers on CNC metal-forming, Lisp-programmed automated stair-detail production, Auto CAD-generated shop drawings, proprietary factory-applied treads (Tuff-Tread™, Tuff-Coat™), and a pre-engineered Drop-In™ modular system that enables off-site fabrication and rapid on-site erection. Revenue streams include custom stair fabrication, e-commerce stair-kit hardware sales, resale of Italian-made modular kits, egress-system contracts, and bundled engineering/specification professional services.

Name

Duvinage

Legal name

Duvinage LLC

Website

https://duvinage.com

Company type

Private

Founded year

1895

Operating status

Operating

Headcount range

11–50 employees

Short description

Duvinage is a 131-year-old U.S. manufacturer of custom metal stairs — spiral, circular, straight, alternating tread, ships ladders, and modular kits — plus the Sharon Stairs Drop-In™ egress system, serving residential, commercial, and industrial customers across all 50 states.

Ownership category

akta.pro rank

Product category

Custom Metal Stairs

NAICS

Ornamental and Architectural Metal Products Manufacturing (33232), Sheet Metal Work Manufacturing (332322)

SIC

Metal Doors, Sash, Frames, Moldings & Trim (3442)

akta.pro primary industry

Stair Parts, Railings & Architectural Woodwork (HSAPAIAJ)

akta.pro secondary industry

Stair, Railing & Banister Repair (HSAGABAE)

Keywords

• Custom metal stairs
• Spiral staircase fabrication
• Commercial egress stairs
• Modular stair kits
• Alternating tread stairs

Headquarters

HQ city

Hagerstown

HQ country

United States

HQ region

North America

Offices4 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

Personnel, Supply Chain, Operations, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Custom Metal Stair Fabrication (Spiral, Circular/Monumental, Straight, Alternating Tread, Ships Ladders): Project-based one-time fabrication and sale of custom-engineered metal stairs to residential, commercial, and industrial clients. Each custom stair is fully assembled in the manufacturing facility prior to shipment. Billed via Proposal Contracts.
2. Chicago Spiral Stair Kit Direct Sales: E-commerce direct sales of the Chicago KS60 spiral stair kit (code-compliant, primer/painted/galvanized/black/deck configurations) and accessories (red oak covers, diamond plate, paint, hardware, riser plates, platform rail). One-time hardware sale with free shipping in contiguous U.S. on orders over $999.
3. Italian-Made Modular Stair Kit Resale (Phola, Composity, Mini, Small): Distribution/resale of made-in-Italy modular interior stair kits (powder-coated steel frames with solid beech or birch plywood treads). One-time hardware sale.
4. Sharon Stairs Drop-In Egress System Sales: Sale of pre-engineered modular egress stair systems to commercial building projects (multi-family, hospitals, intermodal, stadiums), including erection drawings, Stair Erection Manual, and structural engineer certification; quoted via Proposal Contract with full terms and conditions.
5. Engineering & Specification Professional Services: Professional engineering calculations, full shop drawings (PDF and CAD), written specifications, bid documents, code compliance support, and lifetime support for installed stairs, bundled with project bids.

Pricing tiers

Go-to-market motion4 records

Distribution channels5 records

Marketing channels8 records

Core offering

Duvinage designs, engineers, and fabricates custom metal stairs — spiral, circular/monumental, straight, alternating tread, ships ladders, and the Sharon Stairs Drop-In™ pre-engineered egress system — for residential, commercial, and industrial customers. It also sells modular DIY stair kits (Chicago KS60 spiral kits and Italian-made Phola, Composity, Mini, Small straight/alternating kits) directly via duvinage.com e-commerce. Every custom stair is fully assembled in the Hagerstown, MD facility prior to shipment and supported by full shop drawings and Professional Engineering calculations.

Product overview

Duvinage LLC is a single integrated manufacturer of custom metal stairs, founded in 1895, that designs, engineers, and fabricates every type of metal stair from a Hagerstown, MD facility. Its product portfolio is organized into several complementary product lines that work together as a unified offering: custom Spiral Stairs (with named models such as The Classic/135, The New Yorker/141, The Memphis/165, The Baltimore/175, The Stalworth/201, The Boston/220, The San Antonio/251, and The Miami/410), Circular and Monumental Stairs (single and double stringer), Custom Straight Stairs, Alternating Tread Stairs, Ships Ladders, and Ornamental Railing, alongside a modular/DIY product line consisting of The Chicago Spiral Stair Kit family (KS60 code-compliant, Black, Outdoor Galvanized, and Deck variants) and Italian-made kits (The Phola, The Composity, The Mini, The Small). Through its Sharon Stairs division, acquired from Worthington Industries in 2012, Duvinage adds the pre-engineered Drop-In™ Egress Stair System for commercial buildings, including Tread Designs (Tuff-Tread™, Tuff-Coat™, Checkered Plate, Drop-In™ Precast, Field Poured Concrete), Rail Options, and Industrial Platforms. Together, these product lines position Duvinage as the only American company capable of engineering and fabricating every type of metal stair under one roof for residential, commercial, and industrial customers.

Differentiator

Problem solved

Functional benefit

Brands

• Sharon Stairs: Drop-In egress stair systems brand specializing in commercial stair and rail systems; founded 1963, acquired by Duvinage in 2012 from Worthington Industries. Operates as a division of Duvinage LLC.
• The Chicago (Spiral Staircase Kit)
• The New Yorker
• The Baltimore

Products and services

• Custom Spiral Stairs Custom-designed and fabricated spiral staircases in steel, stainless steel, and aluminum with wood, glass, stone, and other tread options; offered in diameters ranging from compact to large. Targets residential, commercial, and industrial clients via direct sales and the national sales-rep network.
• Circular and Monumental Stairs Architecturally significant helical/curved stairs, including circular staircases, double-stringer staircases, and single-stringer staircases (cantilevered floating effect). Steel treads accept marble, wood, carpet, terrazzo, tile, concrete, and glass, with custom curved metal/wood railings. Full shop drawings and Professional Engineering calculations provided; featured in the White House, The Ritz Carlton, and The National Gallery of Art.
• Custom Straight Stairs Custom straight metal stairs with intricate rail designs, suitable for monumental commercial projects and residential applications. Includes commercial stairs with stainless multiline rail and related straight stair products.
• Alternating Tread Stairs Custom alternating tread stairs providing vertical access with a shorter horizontal span than traditional stairs. Available in steel, stainless steel, and aluminum with finishes including mill, primer, paint, powder coat, and hot-dip galvanizing. Ideal for mezzanines, roof access, production lines, parapets, equipment access, catwalks, storage tanks, emergency egress, and loading docks.
• Ships Ladders Permanent ladders with grab rails on both sides and slip-resistant treads, custom designed and fabricated for specific floor-to-floor heights and angles. Available in steel, stainless steel, and aluminum with multiple finish options. IBC and OSHA compliant versions available. Used in lighthouses, FAA control towers, universities, and office buildings.
• The Chicago Spiral Stair Kit (KS60) 60" diameter IRC code-compliant spiral stair kit, adjustable to floor-to-floor heights from 80" to 152" (9–16 risers). Standard kit includes steel smooth plate 30° treads, steel balusters with 4" code spacing, aluminum handrail 1 1/4" O.D., steel smooth plate platform 31" x 31", steel platform rail 36"H, and primered steel center pole. Available in primered, black painted, white painted, custom paint, and galvanized finishes. Made in USA. Sold direct-to-consumer via duvinage.com.
• The Chicago Outdoor Galvanized Spiral Stair Kit 60" diameter hot-dip galvanized diamond plate spiral stair kit designed for outdoor use and exterior endurance. Includes stainless steel hardware and assembly instructions. IRC code compliant. Made in USA.
• The Chicago Black Code Compliant Spiral Stair Kit Most popular color and configuration of The Chicago spiral stair kit, with black painted steel center pole and all steel finished in durable black enamel paint. Touch-up paint included. IRC code compliant. Made in USA.
• The Chicago Deck Spiral Stair Kit 60" diameter deck-configured spiral stair kit with 2 sides of steel platform rail 36"H. Available in primered, painted black, or hot-dip galvanized finishes (galvanized recommended for exterior applications). IRC code compliant. Made in USA.
• The Phola Wood-Accented Spiral Staircase Kit Modular interior spiral stair kit in white metal with wood accents. Features solid beech wood treads, asymmetrical platform, white handrail, and white powder-coated steel balusters. Easy and fast to install. Available in white/sand. Made in Italy. Distributed in the U.S. by Duvinage via duvinage.com and the sales-rep network.
• The Composity Straight Staircase Kit Modular interior I/L-shaped straight stair kit featuring a powder coated modular frame, solid beech wood treads with a varnished finish, and solid beech wood handrail with steel balusters. L-shape configuration possible with the addition of a landing. Available in white/natural. Made in Italy.
• The Mini Straight Staircase Kit Alternating tread stair for very small spaces, featuring a powder coated steel modular frame, solid beech wood treads, and solid beech wood handrail with steel balusters. Comes standard in a straight run I-shape. Available in white/natural. Made in Italy.
• The Small Straight Staircase Kit Economical modular stair kit for the smallest of spaces, featuring a powder coated steel modular frame, birch plywood asymmetric treads, and white handrail with steel balusters. Comes standard in a straight run I-shape. Available in white/natural. Made in Italy.
• Sharon Stairs Drop-In™ Egress Stair System Pre-engineered drop-in commercial egress stair systems pioneered by Sharon Stairs (a Duvinage division since 2012) since 1963. Manufactured in a quality-controlled environment offsite for fast, easy installation and lower overall cost (claimed 30–40% less than site-built stairs). Code-compliant (IBC, NFPA 101, ADAAG) and ADA accessible, with pre-engineered structural modules for stringers, landing frames, connections, and standard railing components. Used in high-rise multi-family dwellings, hospitals, intermodal facilities, stadiums, hotels, and government buildings. Includes erection drawings, Stair Erection Manual, and structural engineer certification.
• Ornamental Railing Custom curved railings in metal and wood, offered as part of Duvinage's metal stair portfolio. Used in residential, commercial, and monumental stair projects.
• Industrial Platforms Industrial platforms custom designed and fabricated to requirements for equipment access in industrial environments.

Quantifiable outcome

• 30–40% lower overall cost vs. site-built, plans, and spec stairs (Sharon Stairs Drop-In system)
• +5 more outcomes

Named customers35 records

Segments6 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Five partnerships are on record, tiered major (one-time), core (product-line extension), minor (earned-media), core (e-commerce infrastructure) and core (logistics).

• Worthington Industries (NYSE: WOR)major (one-time)OthersIn 2012, Duvinage acquired Sharon Stairs (previously known as Worthington Metal Fabricators, LLC) from Worthington Industries; production was moved from Akron, OH to Hagerstown, MD and the Sharon Stairs Drop-In egress line was folded into Duvinage.
• Italian Modular Stair Manufacturer (Phola, Composity, Mini, Small product lines)core (product-line extension)Channel Partner/ Reseller/ DistributorDuvinage distributes/resells Italian-made modular stair kits (The Phola spiral, The Composity I/L-shaped straight, The Mini and The Small alternating-tread/space-saving straights) in the U.S. market through its duvinage.com storefront and sales-rep network; all four are explicitly labeled "Made in Italy."
• Science Channel (How It's Made, Season 24, Episode 2, 2019)minor (earned-media)GTM or Marketing PartnerDuvinage was featured in a 2019 episode of Science Channel's "How It's Made" as skilled craftsmen fabricated a Duvinage custom steel spiral stair with wood treads and handrail. The segment continues to drive brand awareness via YouTube on-demand viewing.
• PayPal (payment processing)core (e-commerce infrastructure)Technology or IntegrationPayPal is integrated as the primary payment processor on duvinage.com's e-commerce checkout, supporting PayPal, PayPal Credit, and all major credit cards; payment badges are displayed across the site (including the homepage).
• LTL / Full Truckload Freight Carrierscore (logistics)Implementation/ SI/ Consulting PartnerDuvinage ships most single stair orders via LTL freight carriers (residential delivery and liftgate options available) and larger/multi-stair orders via full truckload freight. PRO/tracking numbers are shared with the customer, and shipping-related issues are coordinated between the carrier and Duvinage.

Scale indicators11 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• Viewrail: Viewrail designs and manufactures premium custom stairs, glass railing systems, and cable railings for residential and commercial projects in the U.S. Highly comparable to Duvinage as a vertically integrated U.S. custom-stair manufacturer serving architects and homeowners with premium finishes and modular configurator options.
• Arcways: Arcways designs and fabricates custom circular, spiral, and helical metal staircases for residential and commercial applications. Direct comparable to Duvinage on custom monumental/circular stair craftsmanship with similar U.S. project-based sales motion.
• Pacific Stair Corporation: Pacific Stair manufactures commercial steel stairs, ornamental railings, and architectural metal fabrications for high-rise, healthcare, and government construction. Comparable to Duvinage's commercial/Sharon Stairs Drop-In™ business serving GCs and architects on code-compliant egress stairs.
• The Iron Shop: The Iron Shop is one of the largest U.S. manufacturers of spiral stair kits sold direct-to-consumer and through dealers. Closely comparable to Duvinage's Chicago KS60 kit line on configurable code-compliant spiral kits with online e-commerce.
• Salter Spiral Stair: Salter Spiral Stair designs and fabricates custom spiral staircases in steel, aluminum, and wood for residential and commercial use. Direct comparable to Duvinage's spiral-stair business with similar code-compliant kit and custom offerings.
• American Stairways Inc. American Stairways manufactures commercial metal stairs and railings for the construction industry. Comparable to Duvinage's commercial/Sharon Stairs Drop-In™ egress and architectural metal work for GC/architect specs.
• All-Fab Steel Inc. All-Fab Steel fabricates structural and miscellaneous steel including commercial stairs, ladders, and platforms for industrial and commercial construction. Comparable to Duvinage's industrial stair/ladder/platform business for harsh-service environments.

Emerging players

• StairSupplies: StairSupplies sells stair parts, iron balusters, and complete stair systems via e-commerce to homeowners and contractors. Adjacent peer sharing Duvinage's DIY/residential stair buyer with online configuration, though more component-focused than full custom fabrication.

Broad incumbents

• Worthington Industries: Worthington Industries (NYSE: WOR) is a large diversified metal-processing company that previously owned Sharon Stairs (sold to Duvinage in 2012). Comparable as a broader metal-fabrication incumbent whose former stair division Duvinage absorbed; represents the alternative large-player path Duvinage could face in spec-driven commercial bids.

Regional players

• Century Architectural Specialties: Century Architectural Specialties fabricates ornamental and architectural metalwork including stairs and railings, primarily serving the Southeast U.S. Comparable custom-fabrication scope to Duvinage but with a regional concentration rather than national coverage.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/DuvinageStairs
• Facebookfacebook.com/DuvinageStairs
• LinkedInlinkedin.com/company/duvinage

Compliance9 records

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Duvinage