Steel Masters NYC custom fabricates and installs commercial steel staircases for apartment buildings, restaurants, storefronts, warehouses, factories, schools, and office buildings throughout New York City. Every staircase is built to your exact floor-to-floor height, footprint, and tread configuration in our Brooklyn shop — and installed by our own crew with no subcontractors.

Whether you’re replacing a rotted wooden basement staircase in a Brooklyn brownstone, installing a new egress staircase in a Queens commercial building, or fabricating a floating steel staircase for a Manhattan rooftop, Steel Masters Inc. has been building proper commercial steel staircases since 1972.

steel metal diamond plate closed basement access steps tread slipproof

Storefront Basement access steel closed diamond plated staircase fabricated and installed.

basement access street sidewalk steps stairs staircase metal iron steel

New steel stairs installed for storefront basement access.

steel step fabrication

grated steel steps landing tubular railing

grated steel steps with landing and tubular hand railing painted black

long steel backyard stairs landing tube railings rails

Extra long steel backyard stairs with landing and tube railings, nyc

Closed tread metal checkered plate indoor staircase

stairs indoor structure fabricated custom diamond plate treads

Indoor steel staircase with railings - NY

indoor steel staircase split three levels

commercial iron steps storefront railing metal double doors east side nyc

Commercial storefront diamond plate staircase for restaurant with new steel railings and custom metal double doors. All solid welded steel. Lower east side nyc

floating steel staircase rooftop custom iron works

Floating steel open staircase on rooftop custom iron works, upper west side manhattan

diamond plate landing steps plate hallway steel tread

Interior double diamond plate landing with 2 closed tread diamond plate steps for hallway. Midtown nyc

steel pan indoor staircase brooklyn newyork nyc

Basement steel pan indoor staircase in brooklyn, nyc

landing metal staircases supports safety gate top

Metal staircases with 2 landings, supports and safety gate at top williamsburg, Brooklyn

tread diamond plate metal stair custom filler plate

Closed tread diamond plate metal stairs with custom filler plates. w 46st nyc

Open tread basement interior diamond plate metal staircases with square tube railing and support posts, forest hills queens ny

commercial tread stairs metal diamond plate staircase office loft welded pipe railing

Interior extra long commercial open tread diamond plate staircase leading to office loft with 3 line welded pipe railing

- Morris park bronx new york.

Indoor fireproof basement steps galvanized grating pipe railing

Indoor fireproof basement steps of galvanized grating with pipe railing

storefront basement egress-galvanized grating metal stairs-hinged steel plate folding loading ramp egress

Storefront basement egress galvanized grating metal stairs with hinged steel plate folding loading ramp

outdoor fire staircase galvanized welded pipe railing platform grating steps

Outdoor fire staircase with galvanized grating steps, 3 line welded pipe railing and mid landing platform ,painted in cucumber green outdoor paint.

fireproof tread indoor stairs welded pipe railing support tubes fire

Closed tread indoor fireproof stairs with 3 line welded pipe-railing and support tubes

interior metal stairs guard railing steps

Interior metal stairs with ada guard railing

diamond plate steel landing bullnode guard railing steel secure

Diamond plate steel landing with bullnode and guard railing

open diamond plate structure staircase step stair commercial new york

Open tread metal bent diamond plate structural commercial staircase in store allen street new york

indoor metal stairs tube steel post welded mounting plates brooklyn new york city nyc

Indoor metal stairs with tube steel support posts and welded mounting plates in brooklyn, NYC

Staircase fabricated indoor steel

Closed tread diamond plate custom metal stairs endcaps pipe railing, Soho new york city

Closed tread diamond plate Custom metal stairs with endcaps and piperailing, Soho new york city

Closed tread diamond plate Custom metal stairs with endcaps and piperailing, Soho NYC

Metal stairs with round bar and tube railings

Steel stairs and custom balcony railings

Open tread diamond plate interior fireproof basement store stairs painted black

Steel staircases steps

4 foot wide steel diamond plate 1/4 this steps with square tube pipe railings

metal fire egress staircase pipe railings

Galvanized metal fire egress staircase and pipe-railings

Structural commercial steel pan stair tower with structural framing, guardrail, stairs + landing, and protective debris mesh. (Manhattan, NY)

Grating Steps

Exterior metal stairs with open tread diamond plate fully welded steel steps and solid railings.

Outside diamond plate steps with landing and picket railings

Closed diamond steel plate stairs

Exterior staircase with supports

Diamond plate iron stairs with piperails

Boiler room catwalks and fixed ship ladders constructed of structural steel channel, galvanized grating all shop welded prepped for fully bolted assembly onsite.

Curved structural stair tower framing. (NY, NY)

Open tread flush mount bolt steps

Open tread simple steel staircase and guard

Diamond plate metal treads bolted to stringers

Institutional Steel staircase stringers. (Brooklyn, NY)

Open tread diamond plate steel staircase

Open tread diamond plate steel stairs with support columns and half inch picket railings, all fully welded.

Treaded fire stairs

Interior metal staircase

Floating steel open staircase on rooftop custom iron works

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Why Contractors and Building Owners Choose Steel Masters NYC for Commercial Staircases

Custom fabricated to your exact specs — every staircase is built to your building’s dimensions. We take measurements on-site, produce shop drawings, fabricate in Brooklyn, and install with our own crew.

NYC Installs — fabricated for NYC commercial staircases including riser height, tread depth, landing dimensions, and handrail requirements.

All tread types available — closed tread diamond plate, open tread bar grating, concrete-filled stair pans, and checkered plate treads available for indoor and outdoor applications.

Landings, platforms, and safety gates — single and double landing configurations, intermediate platforms, and safety gates at top or bottom of run fabricated as part of the complete package.

Pipe railings and wall railings included — welded square tube, round pipe, or custom railings fabricated and installed to code as part of every staircase project.

Over 50 years of NYC commercial ironwork — Steel Masters Inc. has fabricated commercial steel staircases for NYC buildings since 1972. We work with general contractors, real estate management companies, architects, and building owners.

Types of Commercial Steel Staircases We Fabricate

Basement and storefront access staircases are the most common commercial request — closed tread diamond plate or open tread grating stairs replacing old wood or concrete steps for retail storefronts and apartment building basements. Interior commercial egress staircases are fabricated for multi-story commercial and residential buildings, typically using stair pans filled with concrete or diamond plate closed treads. Outdoor and backyard staircases use galvanized steel for corrosion resistance, with open tread grating or diamond plate and welded pipe railings. Floating and architectural staircases are custom-designed for restaurants, lofts, and commercial spaces where appearance matters as much as function. Multi-level staircases with landings handle long floor-to-floor runs requiring one or more intermediate landings — common in warehouses, factories, and multi-story commercial buildings.

Serving All Five Boroughs, Long Island & Westchester

Our crews fabricate and install commercial steel staircases throughout Brooklyn, Manhattan, Queens, the Bronx, Staten Island, Long Island, and Westchester. We handle projects of every scale — from a single basement staircase replacement to complete multi-floor egress staircase systems for large commercial buildings.

Call us at (888) 577-8335 or contact us online for a free estimate. We’ll visit your location, take measurements, and provide a written quote.