Diamond Heavy Haul

What Diamond Heavy Haul does

Diamond Heavy Haul is a family-owned, asset-based specialty carrier focused exclusively on oversize and overweight cargo movement across North America. Founded in 1978 by Steve Engel and headquartered in Shandon, Ohio, the company operates from an 80,000-square-foot manufacturing facility that houses its sister operation, Diamond Trailers, Inc., through which it designs and fabricates proprietary heavy-haul trailers in-house. The customer base spans energy, aerospace, EV manufacturing, industrial, agriculture, and rail — with named clients including Tesla, Boeing, American Electric Power (AEP), Air Products, Enbridge, ADM, Marathon Petroleum, AIDA, Alstom, and Antonov. Service coverage extends across the 48 contiguous US states, Canada, and Mexico.

The company's core offering combines a specialty tractor fleet with at least eight proprietary trailer configurations across perimeter, flat deck, and dual-lane categories, including high-capacity multi-axle units (11-, 13-, 19-, and 20-axle lowboys) engineered for superloads that exceed standard weight and dimension thresholds. Equipment is paired with in-house permit and routing expertise, laser height-pole route surveys, and credentials such as TWIC certification and SCRA membership. Vertical integration into trailer fabrication provides control over lead time, configuration, and capacity that pure brokerage or generalist carriers cannot match.

The business model is quote-based B2B project hauling: each shipment is engineered to load specifications, routed against state and provincial permit constraints, and priced per move rather than per unit weight or mile. Revenue derives from project hauling fees and, potentially, the sale or lease of proprietary trailer platforms. The company remains privately held and family-owned, with second-generation leadership now in the President/CEO seat. Hiring is actively solicited publicly, but no revenue figures, growth-rate disclosures, or financial metrics are publicly available.

Name

Diamond Heavy Haul

Legal name

Diamond Heavy Haul, Inc.

Website

https://diamondheavyhaul.com

Company type

Private

Founded year

1978

Operating status

Operating

Headcount range

11–50 employees

Short description

Diamond Heavy Haul is a family-owned, asset-based oversize/overweight cargo carrier that designs and fabricates proprietary multi-axle trailers in-house from its Shandon, Ohio facility, serving energy, aerospace, EV, and industrial customers across North America.

Ownership category

akta.pro rank

Product category

Heavy Haul Transportation Services

NAICS

Specialized Freight Trucking (4842), Specialized Freight (except Used Goods) Trucking, Long-Distance (48423)

SIC

Trucking (No Local) (4213), Truck Trailers (3715), Trucking & Courier Services (No Air) (4210)

akta.pro primary industry

Heavy Haul & Oversize (OSOW) Trucking (TLADAGAA)

akta.pro secondary industries

Trailer Manufacturing (Utility/Enclosed/Flatbed/Car Hauler) (IMACAGAA), Industrial Plants & Process Equipment (EPC/Turnkey Projects) (TLACAIAA)

Keywords

• Heavy haul transport
• Oversize cargo shipping
• Specialized trucking services
• Heavy equipment transport
• Industrial freight hauling

Headquarters

HQ city

Shandon

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Supply Chain

Revenue model

1. Specialized Transportation Services: Asset-based transportation of oversize and overweight cargo, specializing in excessively long, wide, tall, and heavy commodities that require specialized equipment for transport. Services include feasibility studies, route surveys, site assessments, and engineered transportation services. They also offer company owned and operated pilot cars.
2. Equipment Manufacturing and Customization: Trailer manufacturing and custom equipment modification through Diamond Trailers, Inc. The company designs, builds, maintains, and stores all equipment at their 80,000 square foot manufacturing facility. Custom modifications and cargo interfacing are available to suit customer needs.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels3 records

Core offering

Diamond Heavy Haul, Inc. specializes in the transportation of oversize, overweight, and high-value cargo for industrial clients across the United States. The company provides engineered transportation services including route surveys, site assessments, pilot car escort services, and specialized hauling using its proprietary fleet of Perimeter, Flat Deck, Dual Lane, and Super Dual Lane trailers. Founded in 1978, the company also operates Diamond Trailers, Inc. as a manufacturing subsidiary producing specialized trailers.

Product overview

Diamond Heavy Haul, Inc. is a specialized heavy haul transportation company offering a fleet of multi-axle heavy haul trailers and related transportation services. The product portfolio consists of eight distinct trailer types organized in two main categories: perimeter frame trailers (Perimeter 6-7-8 Axle, Perimeter 9-10-11 Axle, Perimeter 13 Axle, Perimeter 20 Axle) and flat deck trailers (Flat Deck 13 Axle, Flat Deck 20 Axle), plus dual lane transporters (Dual Lane Transporter, Super Dual Lane Transporter) for extra-wide cargo. All trailers are designed, built, and maintained at the company's affiliated Diamond Trailers manufacturing facility. The company provides comprehensive transportation services including permit acquisition, route surveys, site assessments, pilot cars, and engineered transportation solutions.

Differentiator

Problem solved

Functional benefit

Brands

• Diamond Trailers: Trailer design and manufacturing company that designs, builds, maintains and stores equipment at the 80,000 square foot manufacturing facility near Cincinnati, Ohio

Products and services

• Heavy Haul Transportation Services End-to-end heavy haul transportation of oversize, overweight, and high-value industrial cargo for manufacturers, energy companies, and infrastructure projects using a proprietary fleet of specialized trailers.
• Route Survey and Site Assessment Pre-transport engineering analysis including route surveys and site assessments to plan safe movement of oversize loads.
• Pilot Car Escort Services Pilot car and escort vehicle services to accompany oversize loads during transport in compliance with state regulations.
• Engineered Transportation Planning Custom engineered transportation planning for complex cargo movements including load securement, route engineering, and permit acquisition.
• Specialized Trailer Hauling Transportation services utilizing proprietary Perimeter, Flat Deck, Dual Lane, and Super Dual Lane trailer configurations for unique cargo requirements.
• Diamond Trailers (Manufacturing) Manufacturing subsidiary Diamond Trailers, Inc. produces specialized heavy haul trailers for both internal fleet use and commercial sale.

Quantifiable outcome

• Reputation as industry leader in specialized transportation
• +1 more outcomes

Named customers10 records

Segments6 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

One partnership is on record.

• Specialized Carriers & Rigging Association (SCRA)coreOthersDiamond Heavy Haul, Inc. is a member of the Specialized Carriers & Rigging Association, an industry organization for the specialized transportation sector. Membership indicates compliance with industry standards and participation in the specialized transportation industry community.

Scale indicators4 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Buchanan Heavy Haul: Asset-based specialized carrier moving oversize and overweight loads across the U.S. Similar mid-sized, family/operator-led OSOW services for industrial equipment and heavy machinery.
• TriAxle Specialized: Specialized heavy haul carrier with multi-axle trailers for oversize industrial equipment. Comparable asset-based, niche-focused OSOW services targeting manufacturing, energy, and aerospace customers.
• Ace Doran Hauling & Rigging: Specialized heavy haul and rigging carrier serving industrial, energy, and manufacturing customers across the U.S. Directly comparable OSOW trucking services, custom rigging equipment, and engineered transportation for heavy machinery.
• Bennett Motor Express: One of the largest specialized heavy haul carriers in North America, moving oversize and overweight industrial equipment across similar end markets (energy, aerospace, manufacturing). Directly comparable asset-based, OSOW trucking model with similar services (route surveys, permits, pilot cars).
• Lone Star Transportation: Texas-based heavy haul carrier specializing in oversize loads, flatbed, and specialized trailers for industrial equipment. Closely aligned OSOW trucking services with similar mid-sized, asset-based operating model.
• MELLOY Enterprises: Family-owned heavy haul specialist based in Texas moving oversize industrial equipment. Comparable asset-based OSOW services with custom trailers, mirroring Diamond Heavy Haul's vertically integrated approach and similar customer profile (energy, industrial manufacturers).
• Tiller Minden Heavy Haul: Specialized heavy haul carrier serving the western U.S. with oversize and overweight equipment moves. Directly comparable mid-sized OSOW trucking model with custom trailer capabilities for industrial and energy customers.
• N-S Heavy Haul: Specialized heavy haul trucking carrier focused on oversize and overweight loads for industrial customers. Comparable mid-sized OSOW services, custom trailer fleet, and engineered transportation offerings.

Broad incumbents

• Landstar System: Large asset-light logistics and trucking network with a dedicated heavy-haul/specialized transportation division. Overlaps with Diamond Heavy Haul in OSOW capacity but operates a much broader portfolio of freight services and serves as a larger competitive threat.

Others

• Diamond Trailers (subsidiary peer for manufacturing arm): Actually a wholly-owned subsidiary of Diamond Heavy Haul, listed here for context on the trailer manufacturing side. Comparable to independent specialty trailer OEMs (e.g., Talbert, Trail King) that build custom heavy haul trailers for carriers and end users.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights6 records

Customer concentration

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 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 Diamond Heavy Haul