Steel Masters NYC custom fabricates and installs indoor metal fireproof staircases for commercial and residential buildings throughout New York City. From closed tread diamond plate basement stairs to wide industrial grating staircases with landings and pipe railings, every staircase is fabricated to your exact specifications in our Brooklyn shop and installed by our own crew.

Indoor metal staircases for egress, basement access, mezzanine access, and fire exit applications in commercial, industrial, and multi-dwelling residential buildings. Steel Masters Inc. has been fabricating metal staircases since 1972 — serving apartment buildings, restaurants, factories, hospitals, schools, and retail storefronts across all five boroughs.

Grey interior open tread metal steps - Queens, NY

Indoor closed tread steps with filler plate

Double long stairs with two landings.

Indoor closed diamond plated reataurant steps painted black

Indoor closed dimaond plate restaurant steps painted black.

Interior extra long stars with two landings and wall railings

fireproof steel metal diamond plate closed basement access steps tread safety

Secure Basement access diamond plated staircase fabricated and installed

basement access street sidewalk steps stairs staircase metal iron steel

New steel stairs installed for storefront basement access

Welded pipe guard railing grating opening brooklyn interior staircase

Welded pipe guard-railing around cut grating opening for new brooklyn interior staircase

stairs indoor structure fabricated custom diamond plate treads - NY

Interior industrial fireproof galvanized metal grating staircases ADA compliant welded pipe railings Midtown Manhattan

Interior industrial fireproof galvanized metal grating staircases with ADA compliant welded pipe railings, Midtown Manhattan

Extra wide and long open tread diamond plate steel indoor

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

- Morris park bronx new york.

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

Storefront basement egress galvanized grating metal stairs with hinged steel plate folding loading ramp, Brooklyn queens basement NYC

Structural metal commercial diamond plate stair pans bullnose landing

Galvanized steel fire stairs mid landing three line welded pipe railing Midtown manhattan

Galvanized steel fire stairs with mid
landing and 3 line welded pipe railing
- Midtown manhattan

diamond plate walkways and landings - queens, nyc

Bolt construction welded interior commercial closed tread diamond plate switchback metal staircase, painted upper west side NYC

Bolt construction weld free interior commercial closed tread diamond plate switchback metal staircase, painted gray, upper west side NYC

12 continous staircases guard railing handrails fire stairs

12 continous staircases guard railing with handrails for fire stairs, rockville center, long island

Grating steps stairs drainage less foor slippage

Grating steps on stairs allow for drainage with less foor slippage, manhattan NYC

7 foot wide indoor steel store staircase, downtown brooklyn NY

Basement steel pan indoor staircases brooklyn ny

Indoor steel commercial fireproof stairs factory industrial queens New york

Indoor steel commercial fireproof stairs factory, queens New york

Custom galvanized industrial basement mechanical room staircase, rustproof.
East new york brooklyn

Open tread flush mount plate stringers, bolted steps, bronx ny

Diamond Plate Iron Stairs with Piperails, queens nyc

Indoor commercial fireproof mezzanine office stairs, willets point queens

Structural steel tube stringer stairs prepped steps graves end brooklyn

Structural steel tube stringer stairs prepped for marble or wood steps graves end brooklyn

indoor rooftop closed tread custom staircase split landing

Indoor rooftop access, L shaped, closed tread custom staircase with split landing. Astoria queens ny.

Basement access stairs steel,
far rockaway, NY

Staircase fabricated indoor steel,
college point, ny

Open tread diamond plate interior fireproof basement store stairs black

Open tread diamond plate interior fireproof basement store stairs painted black, queens village NY

staircase guard railing with pickets and newel posts, long island city

iron railings for fire stairs bolted to concrete slabs, long island city

Diamond plate steps, ozone park

Metal open tread utilities staircases, richmond hill

Closed tread fire stairs, jamaica NYC

Closed tread diamond plate steps
maspeth NY

Interior Metal Staircase, seaside queens

Why Property Owners and Contractors Choose Steel Masters NYC for Indoor Metal Staircases

Custom fabricated to your exact dimensions — every staircase is built to your floor-to-floor height, footprint, and tread width. No standard sizing, no compromise on fit.

NYC Installs — fabricated to meet requirements including riser height, tread depth, landing dimensions, and handrail requirements.

Multiple tread options — closed tread diamond plate, open tread grating, bar grating, and concrete-filled stair pans available depending on your application and aesthetic.

Landings and intermediate platforms — single and double landing configurations fabricated for long runs, basement egress, and mezzanine access applications.

Pipe railings and wall railings included — welded pipe guard railings and wall-mounted handrails fabricated and installed as part of the complete staircase package.

Fabricated and installed by our own crew — from shop drawings to final installation, our Brooklyn-based team handles every step. No subcontractors.

Types of Indoor Metal Staircases We Fabricate

Steel Masters NYC fabricates all types of indoor metal staircases for NYC buildings. Closed tread staircases use solid diamond plate or steel plate treads — the most common choice for basement access, commercial egress, and restaurant back-of-house applications. Open tread grating staircases use bar grating or expanded metal treads that allow light and airflow — ideal for industrial facilities, warehouses, and mechanical access. Stair pan staircases use formed steel pans filled with concrete, providing a durable surface that meets fire rating requirements for multi-story commercial buildings. Extra-wide staircases with double landings are fabricated for high-traffic commercial and industrial applications where standard width is insufficient. All configurations can be finished with welded pipe railings, wall railings, or both.

Serving All Five Boroughs, Long Island & Westchester

Our crews fabricate and install indoor metal staircases throughout Brooklyn, Manhattan, Queens, the Bronx, Staten Island, Long Island, and Westchester. We work with building owners, property managers, general contractors, architects, and facilities teams on projects of every size and complexity.

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