D&H Steel Construction

What D&H Steel Construction does

D&H Steel Construction Limited is a privately owned New Zealand structural steel fabricator and erector founded in 1972 in Henderson, Auckland (originally as Dixon & Haddon Ltd). The company designs, fabricates, and erects structural steel for vertical construction — commercial buildings, apartments, industrial facilities, bridges, and infrastructure — serving main contractors, developers, and institutional clients such as Hawkins Construction, Naylor Love, NZ Strong, Macrennie, Beca, and Jasmax across Auckland, Christchurch, Tauranga, and Thames. Projects are won through direct tendering and early contractor involvement, with typical contracts above 25 tonnes of steel and lead times of 12+ weeks.

The company's core technology stack includes a purpose-built 11,000m² workshop with 2 FICEP CNC beamlines, an AGT welding robot, integrated shot blasting and painting facilities, 7 owned cranes (including 70T Tadano), and 16 elevated work platforms. Production capacity is 250-400 tonnes per week. BIM modeling has been used for over 15 years and integrates with Autodesk Construction Cloud, Dalux, Revizto, Navisworks, Revit, and ArchiCAD. The Custom Welded Beams (CWB) product line uses submerged arc twin-wire welding to produce beams up to 31m in length and 2000mm in depth. D&H is the first NZ company to receive AS/NZS ISO 3834 and Steel Fabrication Certification (SFC), and holds ISO 9001:2015, Toitū Enviromark Gold, SiteWise Gold, and Responsible Product Certified Level 3.

Revenue is generated through project-based one-time contracts awarded via tender. The firm employs approximately 400 people and is led by Managing Director Wayne Carson, Executive Director Mike Sullivan, General Manager Richard Hine, and Operations Manager Dean Pouwhare. Customers cite proactive project management, value engineering, on-program delivery, and integrated detailing-to-erection capability as the basis for repeat specification. The associate company Clearwater Construction Ltd extends the offering into composite structural steel and concrete structures.

Name

D&H Steel Construction

Legal name

D&H Steel Construction Limited

Website

https://dhsteel.co.nz

Company type

Private

Founded year

1972

Operating status

Operating

Headcount range

51–100 employees

Short description

D&H Steel Construction is a privately owned New Zealand structural steel fabricator and erector, founded 1972, serving main contractors and developers on commercial, industrial, infrastructure, and institutional projects across Auckland, Christchurch, Tauranga, and Thames.

Ownership category

akta.pro rank

Product category

Structural Steel Fabrication and Construction

NAICS

Fabricated Structural Metal Manufacturing (332312), Structural Steel and Precast Concrete Contractors (238120), Structural Steel and Precast Concrete Contractors (23812), Ornamental and Architectural Metal Products Manufacturing (33232)

SIC

Fabricated Structural Metal Products (3440), Sheet Metal Work (3444), Heavy Construction Other Than Bldg Const - Contractors (1600)

akta.pro primary industry

Structural Steel Fabrication (IMADACAA)

akta.pro secondary industries

Steel Plate, Sections & Welded Assemblies (IMADACAD), Bridge & Viaduct Construction (IMAFAEAB), Architectural & Miscellaneous Metals (Stairs, Railings, Ladders) (IMADACAE)

Keywords

• Structural steel fabrication
• Steel construction services
• Custom welded beams
• Commercial steel structures
• Industrial steel erection

Headquarters

HQ city

Auckland

HQ country

New Zealand

HQ region

Oceania

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Structural Steel Fabrication and Erection: D&H Steel designs, fabricates and erects structural steel for vertical construction including commercial, apartment and industrial buildings, bridges and infrastructure projects. Revenue is generated through project-based contracts with main contractors and developers.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

D&H Steel Construction designs, fabricates, and erects structural steel for vertical construction including commercial, apartment and industrial buildings, bridges and infrastructure projects. Their offering spans design and value engineering, construction planning, BIM-based detailing, automated fabrication, in-house corrosion protection, and site erection using their own crane fleet and employed erectors.

Product overview

D&H Steel Construction offers a comprehensive structural steel construction service for vertical construction including commercial, apartment and industrial buildings, bridges and infrastructure projects. Their core service encompasses the entire steel fabrication process from project conception through to site erection sign-off, including design and value engineering, construction planning, detailing, fabrication, corrosion protection, and site management. Their specialized Custom Welded Beams (CWB) product line uses advanced submerged arc welding technology for large-span applications. The company also provides dedicated quality assurance and health & safety management throughout all project phases.

Differentiator

Problem solved

Functional benefit

Brands

• Custom Welded Beams (CWB): State of the art custom welded beam manufacturing using submerged arc, twin wire welders computer controlled to meet highest quality standards. Beam dimensions from 200mm to 2000mm depth, flange width 150mm to 1250mm.

Products and services

• Custom Welded Beams (CWB) Custom Welded Beams (CWB) are manufactured structural members produced by D&H Steel using state-of-the-art submerged arc, twin-wire computer-controlled welders. Beam dimensions supported: depth 200mm-2000mm, flange width 150mm-1250mm, web and flange thickness 8mm-80mm, lengths 6m-31m, in steel grade G350L15 to AS/NZS 3678 (2011). They are suitable for large-span portal frame structures, parking and office buildings, bridge and crane beams, and are designed for projects requiring high-quality welded beam members.
• Structural Steel Fabrication and Erection Services End-to-end structural steel services for vertical construction including commercial, apartment and industrial buildings, bridges and infrastructure projects. The service covers design and value engineering, construction planning, BIM-based detailing, automated fabrication, in-house corrosion protection and on-site erection using D&H's own cranes, elevated work platforms and employed erectors. Customers are main contractors and developers in New Zealand.

Quantifiable outcome

• 250-400 tonnes per week fabrication capacity before outsourcing
• +3 more outcomes

Named customers8 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration6 records

Feature5 records

Partnerships

Nine partnerships are on record, tiered core and supporting.

• MATES in ConstructioncoreStrategic or Co-development Partner · 1 January 2021Mental health and suicide prevention organization for the construction industry. D&H Steel was the first NZ company to receive MATES in Construction Accreditation, demonstrating commitment to workforce welfare.
• Steel Construction New Zealand (SCNZ)coreStrategic or Co-development PartnerIndustry association membership providing access to industry standards, best practices, networking, and awards programs. D&H Steel actively participates in SCNZ Excellence in Steel Awards.
• Sustainable Steel Council (SSC)coreStrategic or Co-development PartnerGroup of industry leaders committed to circular economy and New Zealand's low emissions future. D&H Steel is a Gold certified member and holds Level 3 Responsible Product Certification through SSC.
• Autodesk Construction CloudsupportingTechnology or IntegrationBIM and collaboration platform used by D&H Steel for model management and coordination with design teams and main contractors.
• DaluxsupportingTechnology or IntegrationBIM collaboration platform integrated with D&H Steel's workflow for viewing and coordination.
• ReviztosupportingTechnology or IntegrationBIM collaboration platform integrated with D&H Steel's workflow for viewing and coordination.
• StruMISsupportingTechnology or IntegrationMRP system used for workshop job planning, integrated with CAD/CAM data and production systems.
• Steel Projects PLMsupportingTechnology or IntegrationProduct lifecycle management system that drives FICEP beam lines and AGT welding robot.
• FICEPsupportingTechnology or IntegrationCNC controlled beamlines and flat/angle line equipment manufacturer. D&H uses multiple FICEP CNC machines linked to CAD/CAM data.

Scale indicators4 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• John Jones Steel: John Jones Steel is a New Zealand structural and miscellaneous steel fabricator with comparable vertical construction focus. It competes with D&H on commercial, industrial, and infrastructure tenders in the NZ market.
• United Steel NZ: United Steel is a New Zealand-based structural steel fabricator competing in the same NZ vertical construction market. Comparable in customer base (main contractors, developers) and product category.
• Grayson Engineering: Grayson Engineering is a NZ structural steel fabricator serving commercial and infrastructure projects. It is a directly comparable peer in product offering and target market.
• Eastbridge Engineering: Eastbridge Engineering is a New Zealand-based structural steel fabricator serving commercial and infrastructure projects. It is a directly comparable peer in the same product category, geographic market, and customer base as D&H Steel Construction.
• Hamilton Steel: Hamilton Steel is a NZ structural steel fabrication and erection company operating across commercial and industrial construction. It competes with D&H for tenders from the same main contractor customers.
• CFC Group: CFC Group is a New Zealand-based steel fabrication and construction company serving similar commercial and infrastructure customers. Comparable scope across structural steel and erection services.

Regional players

• Austworld Fabrication Services: Austworld is a larger Australian structural steel fabricator with end-to-end capability similar to D&H. Comparable in product offering but operates primarily in Australia rather than NZ.
• DMI Steel Fabrication: DMI is an Australian structural and architectural steel fabricator. Comparable product offering (CWB, plate work, erection) and customer base, but operating primarily in Australia rather than competing directly with D&H in NZ.

Others

• Steel Construction NZ (SCNZ): SCNZ is the NZ industry association for structural steel, of which D&H is a leading member. Not a direct competitor but a relevant industry/ecosystem participant providing standards, awards, and advocacy.
• FICEP S.p.A. FICEP is the Italian manufacturer of CNC beamlines and fabrication equipment used by D&H. A technology/equipment supplier relevant as a peer through shared technology adoption rather than direct competition.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/dhsteelconstructionltd

Compliance9 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles14 records

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 D&H Steel Construction