Daniel Marr & Son Company

Daniel Marr & Son Company was established in 1898 and has played a major role in the development of the Boston skyline by providing high quality steel and precast concrete erection services to fabricators and general contractors. The professional standards upheld by the company have proven successful time after time: a cooperative team approach, quality performance, effective and timely resolution to project challenges and commitment to a safe working environment.


Marr Scaffolding Company

Marr Scaffolding Company was established in 1945 and provides the rental, sales and servicing of nationally marketed construction products and equipment. Marr Scaffold operates through five distinct divisions: Scaffold, Shoring, Aerial Lifts, Hydro Mobile Mast Climbers and Bleachers and Special Events. The company also operates a Contractor’s Safety and Supply Warehouse that offers a local, on-the-spot resource for contractor supplies and safety items.


Marr Crane & Rigging

Marr Crane & Rigging operates three lines of business: cranes, construction elevators and rigging & storage with an equipment fleet includes 22-ton to 300-ton cranes. The company employs fully-trained and experiences operators and signal persons, riggers and elevator constructors. Rigging of all types of equipment is a core service and we offer significant indoor/outdoor product storage capacity. In 2020, Marr Crane & Rigging operations moved its operations to Braintree, MA. The newly developed 16-acre property consists of two (2) warehouses totaling 91,000-square feet (fully temperature controlled) and 8.5 acres of paved land to accommodate rigging, product storage and transportation services. A fleet of heavy vehicles including tractors, trailers, pick-ups and rack body trucks is maintained.


Isaac Blair & Company, Inc.

Isaac Blair & Co., Inc. was established in 1820 and purchased by Daniel Marr & Son in 1969. The company provides specialty construction shoring and rigging services and has developed an unparalleled expertise in solving complex shoring and rigging challenges, including situations involving hazardous waste and asbestos infestation.