Stewart-Amos Steel

What Stewart-Amos Steel does

Stewart-Amos Steel, Inc. is a private structural steel fabricator founded in 1976 and headquartered in a single AISC-certified facility at 4400 Paxton Street, Harrisburg, Pennsylvania. The company fabricates structural steel packages — including fabricated steel, steel joists (via SJI member manufacturers), and metal deck (via SDI member manufacturers) — for commercial, industrial, and institutional buildings across the Mid-Atlantic region, generally within a 250-mile radius of Harrisburg. Its largest completed project, the Keystone State Office Building, was 9,100 tons and $25 million, and the company is bondable to $25 million per project and $50 million in aggregate.

The company's production system is built on an integrated CAD/CAM-to-CNC workflow. Detail drawings and erection plans are produced in SDS/2 and Tekla 3D steel detailing programs, with BIM models shared with follow-up trades (MEP, building skin) for clash coordination; engineering is sealed by structural engineers licensed in every destination state. CNC equipment — including a Peddinghaus drill line, automated coping machine, Peddinghaus Anglemaster, and a high-def plasma table — is programmed directly from electronic shop drawing files, and project management, material traceability, and quality control are run through Fabtrol fabrication management software. All shop welders are AWS certified.

Revenue is generated on a project basis through hard-bid proposals to general contractors and construction managers (e.g., Barton Malow, Mascaro, Quandel, PJ Dick, Lobar), with the option to staff either union or open-shop labor. The customer base is diversified across healthcare (Penn State Health, Penn Medicine, UPMC Pinnacle, Inspira, Nemours, Lancaster General), higher education (Penn State, Bucknell, Towson, University of Maryland Baltimore), government (PA State Police, PA State Judicial Center), manufacturing (Hershey, Datwyler, Pitt BioForge), hospitality (HersheyPark, DoubleTree), and financial services (PSECU). Recent project activity in 2024-2025 spans healthcare, branded manufacturing, government training facilities, and biomanufacturing construction.

Name

Stewart-Amos Steel

Legal name

Stewart-Amos Steel, Inc.

Website

https://stewartamossteel.com

Company type

Private

Founded year

1976

Operating status

Operating

Headcount range

11–50 employees

Short description

Stewart-Amos Steel is an AISC-certified structural steel fabricator in Harrisburg, PA, serving commercial, industrial, institutional, and government construction in the Mid-Atlantic with integrated detailing, BIM, engineering, and CNC fabrication for projects up to 9,100 tons.

Ownership category

akta.pro rank

Product category

Structural Steel Fabrication

NAICS

Fabricated Structural Metal Manufacturing (332312), Architectural and Structural Metals Manufacturing (3323)

SIC

Fabricated Structural Metal Products (3440)

akta.pro primary industry

Structural Steel Fabrication (IMADACAA)

akta.pro secondary industry

Steel Plate, Sections & Welded Assemblies (IMADACAD)

Keywords

• Structural steel fabrication
• Steel building construction
• AISC certified fabrication
• BIM steel detailing
• Commercial steel structures

Headquarters

HQ city

Harrisburg

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Structural Steel Fabrication Services: One-time project-based revenue from fabrication of structural steel for commercial, industrial, and institutional buildings. The company has fabricated projects as large as 9,100 tons and $25 million for a single contract. Revenue is generated through hard bid proposals and estimates for steel structures.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Core offering

Stewart-Amos Steel fabricates structural steel for commercial, industrial, and institutional buildings, with projects as large as 9,100 tons and $25 million on a single contract. The company operates within a roughly 250-mile radius of its Harrisburg, PA facility and is AISC Certified for complex building structures. Its offering is bundled: structural steel fabrication paired with sales/estimating (hard bid proposals), project management (Fabtrol software), engineering/detailing/BIM (SDS/2 and Tekla), and erection through union and open-shop subcontractors.

Product overview

Stewart-Amos Steel is a steel fabrication company offering a comprehensive suite of services centered on structural steel fabrication for commercial, industrial, and institutional construction. Their core offering is structural steel fabrication, complemented by integrated services including Sales & Estimating (hard bid proposals and budget estimates), Project Management (using Fabtrol software), Engineering/Detailing/BIM Services (using SDS/2 and Tekla 3D programs), and Erection Services (with union and open-shop subcontractors). The company typically operates within a 250-mile radius of Harrisburg, PA, and is AISC certified for fabrication of complex steel structures.

Differentiator

Problem solved

Functional benefit

Products and services

• Structural Steel Fabrication Fabrication of structural steel for commercial, industrial, and institutional buildings and other heavy steel structures. AISC Certified for complex building structures, with projects as large as 9,100 tons and $25 million on a single contract. Serves general contractors and construction managers via hard bid proposals or budget estimates.
• Sales & Estimating Services Hard bid proposals based on completed design drawings and budget estimates from preliminary designs for a large variety of steel structures. Quotes available for both union and open-shop projects; bondable to $25 million per project and $50 million aggregate. Targeted at general contractors and construction managers.
• Project Management Services End-to-end project management from shop drawing preparation, submission, and approval through fabrication and erection, ensuring critical schedules are met. All processes are integrated via Fabtrol software. Targeted at general contractors managing complex steel structures.
• Engineering, Detailing & BIM Services Computer-aided detailing using SDS/2 and Tekla 3D programs to produce shop-ready detail drawings and erection plans, with engineered connections sealed for every state steel is shipped to. BIM models integrate with follow-up trades such as MEP and building skin contractors for clash-free coordination. Targeted at general contractors and design teams on complex building projects.
• Erection Services On-site steel erection delivered via Stewart-Amos's network of union and open-shop erection subcontractors, with steel joists and metal deck sourced from SJI and SDI member manufacturers to provide complete structural steel packages. Targeted at general contractors requiring turnkey fabrication-to-erection delivery.

Quantifiable outcome

• Projects as large as 9,100 tons and $25 million for a single contract
• +1 more outcomes

Named customers25 records

Segments5 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Two partnerships are on record, tiered minor.

• SJI Member ManufacturersminorOthersSteel joist suppliers from Steel Joist Institute member manufacturers, providing complete structural steel packages including joists and metal deck alongside fabricated steel components.
• SDI Member ManufacturersminorOthersMetal deck suppliers from Steel Deck Institute member manufacturers, enabling Stewart-Amos to provide complete structural steel packages including metal deck alongside fabricated steel components.

Scale indicators3 records

Recent moves6 records

Expansion highlights3 records

Direct peers

• Banker Steel Company: Banker Steel is a structural steel fabricator with strong Mid-Atlantic presence, AISC certification, and similar project types including healthcare, institutional, and commercial buildings. Comparable scale and target market.
• Owen Steel Company: Owen Steel is a regional structural steel fabricator with AISC certification, serving commercial, institutional, and industrial projects across the Eastern US. Comparable capabilities and target segments.
• LeJeune Steel Company: LeJeune Steel is a Midwest-based structural steel fabricator serving commercial, healthcare, and industrial projects with AISC certification and similar in-house detailing and BIM capabilities. Closely matched in product and customer type.
• TrueNorth Steel: TrueNorth Steel is a multi-facility structural and miscellaneous steel fabricator with AISC certification serving commercial, healthcare, and industrial customers. Comparable product mix and customer base.
• Cives Steel Company: Cives Steel is a large North American structural steel fabricator with multiple regional plants, AISC certification, and similar capabilities in fabricated structural steel for commercial and industrial buildings. Comparable in product scope, certification, and end-market focus.
• W&W Steel / AFCO Steel: W&W Steel and AFCO Steel are structural steel fabricators with similar AISC-certified operations serving commercial, healthcare, and institutional construction. Directly comparable in product offering, certification, and project scale.
• Hirschfeld Industries: Hirschfeld Industries is a national structural steel fabricator serving commercial, industrial, and institutional markets with AISC certification, comparable project scale, and overlapping customer base including healthcare and large commercial structures. Highly comparable in product offering, certification status, and target end markets.

Broad incumbents

• Nucor Corporation: Nucor is the largest US steel producer with vertical integration into structural steel fabrication and joist/deck products. While a much larger incumbent, Nucor's downstream fabrication arms compete for similar commercial and institutional contracts.
• Schuff Steel (GMS family): Schuff Steel, now part of the broader GMS distribution platform, is a national-scale structural steel fabricator with broader geographic reach and larger bonding capacity. Overlaps in product and customer type but operates at significantly larger scale.

Emerging players

• Epic Steel LLC: Epic Steel is a growing regional structural steel fabricator with AISC certification serving commercial and healthcare projects. Smaller and more focused than Stewart-Amos but with significant overlap in product type and customer verticals.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 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 Stewart-Amos Steel