Formed by Charles Shelly in 1938, the company was acquired in 2000 for $362 million by Oldcastle Materials, a unit of Ireland-based CRH. The acquisition helped boost Shelly's growth and now it produces nearly 9 million tons of asphalt each year. The Shelly Company has only scratched the surface of the road paving business. The company, which produces aggregates and asphalt for road surfacing, operates several aggregate facilities and asphalt plants in Ohio. Operations include quarries, sand and gravel pits, fixed and portable asphalt plants, and bitumen terminals. The Shelly Company is also a paving and road construction contractor. Other divisions manufacture cement and and ready mix concrete.

Nortek delivers a breath of fresh air. The company makes and distributes heating, air conditioning, ventilation (HVAC), and home technology products for the residential and commercial construction, remodeling, and renovation markets. In addition to HVAC systems, Nortek's wares include range hoods and other ventilation products, indoor air-quality systems, lighting controls, and home entertainment and security system equipment. Products, which are sold primarily in North America and Europe, bear the Nortek name, along with other brands including Broan-NuTone, as well as such licensed names as Frigidaire and Maytag.

Cape Environmental Management offers a number of engineering and environmental services, including facility construction and demolition, remediation, and water and wastewater utility-related services. Clients include government agencies such as the US Air Force, and the US Army Corps of Engineers, and industrial clients in the petroleum, chemical, telecommunications, and transportation sectors. Specialty areas include engineering, scientific, construction, and industrial hygiene/safety. The company operates from more than a dozen offices, located across the US. It also has two offices in Iraq. Cape Environmental Management was founded in 1965 and acquired by its executive team in 1991.

Clayco is a top US general building contractor that offers real estate, architecture, design, and construction services. The privately owned company serves a range of industries with a focus on industrial, corporate, government, residential, institutional, and financial facilities. Projects include distribution and logistics centers, industrial facilities, and food and beverage industry warehouses and plants. Clayco also has constructed headquarters and operation centers, call and data centers, sports and education facilities, and retail centers. Its Clayco Realty Group provides land development, site selection, and project financing.

CCCC designs and builds sea ports, roads, bridges, railways, tunnels, and other structures. In addition, the company operates a dredging and reclamation business, as well as a port machinery (mainly container cranes) and construction machinery manufacturing business. Although China constitutes its largest market, CCCC also has substantial operations in Southeast Asia, South America, Africa, and the Middle East. The company, which operates through numerous subsidiaries, was established in 2006.

Bennett Environmental Inc., which operates in Canada and the US, uses a high-temperature process (thermal oxidizer) to treat contaminated soil. The group operates treatment facilities for companies requiring offsite removal and treatment of construction debris and contaminated soil before recycling or disposal. It treats such toxins as PCBs, pesticides, dioxins, creosote, and PCPs. Most of its revenues are generated from its waste remediation plant at Saint Ambroise, Quebec. The company began as a unit of oil spill equipment group Aqua-Guard Technologies, which was also founded by former chairman John Bennett.

China Railway Construction Corporation (CRCC) is on track to remain one of the largest construction companies in China and one of the top 500 enterprises in the world. Although it specializes in railway infrastructure construction, CRCC also has operations in surveying, design, and consulting; industrial manufacturing of road maintenance machinery; and real estate development and logistics services related to its main construction business. In addition to railway systems, the state-owned corporation does work on highways, airports, marine ports, hydropower and water conservancy facilities, industrial plants, and municipal projects both at home and abroad.

PYI Corporation invests in infrastructure and cargo port operations on China's Yangtze River. The company also provides commercial development related to its port facilities and owns a majority stake in Paul Y. Engineering Group. PYI's projects, including joint ventures, include the maritime rescue, bridge decking, railway, and surrounding development at Yangkou Port, located at the north end of the Yangtze River Delta. Paul Y. Engineering invests in, develops, and manages the construction of commercial, residential, hospitality, and institutional properties, primarily in Hong Kong.

Stericycle, Inc., together with its subsidiaries, provides regulated waste management and related services in the United States, Canada, Argentina, Chile, Mexico, Ireland, Portugal, Romania, and the United Kingdom. The company offers various services, which include Bio Systems sharps management services that reduce the risk of needle sticks; various products and services for infection control; Steri-Safe Occupational Safety and Health Act and Health Insurance Portability and Accountability Act compliance programs; and regulated returns management services for expired or recalled products. It serves large-quantity generators of regulated waste, such as hospitals, and pharmaceutical companies and distributors, as well as small-quantity generators of regulated waste, such as doctors’ offices and retail pharmacies. Stericycle, Inc. was founded in 1989 and is based in Lake Forest, Illinois.

CentiMark hit the nail right on the head when it got into the roofing business. The company is one of the largest commercial and industrial roofing contractors in the US and Canada, providing roof inspection, repair, and emergency leak service. CentiMark typically works on flat roofs using EPDM rubber, thermoplastics, bitumen, metal, and coatings. Top customers include NASA and the US Army Corps of Engineers. Its QuestMark division offers commercial, industrial, and retail flooring, do-it-yourself products, and floor maintenance and cleaning products. Chairman and CEO Edward Dunlap founded CentiMark as an industrial cleaning business in 1967. The company, which has 65 offices, is owned by its employees.

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