Certification's Categories of Work

These are the categories of work DCAMM certifies

Prime and small prime categories of work and definitions

Prime Categories of Work	Definition
General Building Construction	The undertaking of general contracts for the construction of buildings (i.e. new construction, renovation, rehabilitation, alteration, addition, etc.).  The project must include a variety of construction practices and supervision of a minimum of three sub-trades.  Each sub-trade must be building-related.  (And each sub-trade must represent at least 5% of the total project cost, up to the first three sub-trades.)  The relocation of concrete modular buildings (type I buildings) or of pre-engineered buildings (type III buildings), pursuant to MGL c. 149 s. 44E, is within the category of general building construction.
Alarm Systems	Installation, renovation, repair and maintenance of low voltage fire protection, security, card access entry systems, closed circuit television systems, motion detectors and other types of alarms systems within a building.  Certification in this category requires possession of an S-License issued by the Massachusetts Department of Public Safety.
Asbestos Removal	The removal and disposal of asbestos previously incorporated into a building, which may include encapsulation.  To be certified in this category, the contractor must possess a current, valid Asbestos Contractor License issued by Massachusetts Occupational Safety for Lead & Asbestos.
Deleading	The undertaking of lead abatement projects involving one or more of the following: scraping and/or chemical stripping of lead paint, encapsulation and covering of lead contaminated surfaces, or removal and replacement of windows, woodwork or other contaminated surfaces within a building.  To be certified in this category, the contractor must possess a current, valid Deleading Contractor License issued by Massachusetts Occupational Safety for Lead & Asbestos
Demolition	Work customarily performed by a building wrecking contractor including the razing of buildings or parts of buildings, major gutting of buildings or removal of structural elements of a building.  The removal of partitions, flooring, windows, etc. incidental to a renovation or remodeling project are not within this category
Doors and Windows	Work customarily performed by this industry, including installation of doors and windows made of wood, metal or other materials, both interior and exterior.  This category does not include glass and glazing by itself
Electrical	Installation, renovation, repair and maintenance of electrical wiring, circuits, panel boards, fixtures and equipment within a building, including such incidental or related work as is customarily performed by those in the electricians' trade.  Certification in this category requires possession of a Massachusetts Master Electrician’s License.
Electronic Security Systems	The design, installation, and servicing of integrated security electronics and communication and access control systems within a building, including but not limited to, touch- screen locking control systems, programmable logic controllers, electronic relay systems, intercom systems, and closed circuit television systems.  This category of work shall include the design, fabrication, project management, installation, and warranty of all systems within this division of work.  The Electronic Security Contractor (ESC) shall be responsible for furnishing and installing all equipment and wiring and testing of all systems with their own forces.  The subcontracting of security work shall not be acceptable.  Certification in this category requires possession of an S-License issued by the Massachusetts Department of Public Safety
Elevators	The installation, maintenance and repair of elevators, handicapped accessible chair lifts, moving stairs or dumbwaiters within a building
Energy Management Systems	The design and installation of systems or maintenance programs to conserve energy use within a building.  This category includes performance-contracting energy saving projects.  These projects may include the installation or modification of new and existing equipment which will reduce energy and water consumption associated with heating, ventilation, and air conditioning system, lighting system, building envelope, domestic hot water system, and other energy and water using devices.  This category also includes the work associated with monitoring and verifying project savings and the study and/or design of the subject work.  Contractors in this category may manage the entire scope of the project and may subcontract portions of the work to others
Exterior Siding	Installation and/or repair of aluminum, vinyl, or other types of siding materials except masonry used on building exteriors
Fire Protection Sprinkler Systems	Installation, renovation, repair and maintenance of fire protection sprinklers in buildings including such incidental or related work as is customarily performed by those in the Fire Protection Sprinkler Systems' trade
Floor Covering	The installation of carpeting, epoxy or resinous flooring, resilient floor coverings, hardwood flooring and all types of tile installed as finished flooring within a building
Historical Building Restoration	Construction/renovation, masonry and roofing work respectively, which meets the Secretary of the Interior’s Standards for Rehabilitation issued by U.S. Department of the Interior.  In instances where of Historical Masonry and/or Historical Roofing are secondary categories, the contractor must be certified by DCAMM in the respective categories of Masonry and Roofing If applicable, the work must meet additional standards and codes administered by the local historical commission or association that oversees the property.
Historical Masonry	Construction/renovation, masonry and roofing work respectively, which meets the Secretary of the Interior’s Standards for Rehabilitation issued by U.S. Department of the Interior.  In instances where of Historical Masonry and/or Historical Roofing are secondary categories, the contractor must be certified by DCAMM in the respective categories of Masonry and Roofing If applicable, the work must meet additional standards and codes administered by the local historical commission or association that oversees the property.
Historical Roofing	Construction/renovation, masonry and roofing work respectively, which meets the Secretary of the Interior’s Standards for Rehabilitation issued by U.S. Department of the Interior.  In instances where of Historical Masonry and/or Historical Roofing are secondary categories, the contractor must be certified by DCAMM in the respective categories of Masonry and Roofing If applicable, the work must meet additional standards and codes administered by the local historical commission or association that oversees the property.
Historical Painting	Painting in circumstances where the original form, integrity, materials and appearance of the building must be maintained to the greatest possible extent consistent with current standards and codes.
HVAC	Installation, renovation repair and maintenance of the systems and apparatus required, collectively or individually, to provide comfort heating, ventilation and/or cooling within or associated with a building, including such incidental or related work as is customarily performed by those in the HVAC trade.  This category does not include sheet metal work by itself
Masonry	Installation, renovation, repair and maintenance of masonry units composed of concrete, stone, or brick which are part of a building, including such incidental or related work as is customarily performed by those in the masons' trade.
Mechanical Systems	The installation, renovation, repair and maintenance of power systems, process piping, instrumentation, controls, compressors, generators, turbines and other associated mechanical systems equipment.  This category applies, in particular, to work on mechanical systems found in major buildings such as power plants, sewage and water treatment plants, pumping stations and similar buildings which requires major mechanical contracting experience.  Contractors certified by DCAMM in Plumbing and HVAC are automatically entitled to certification in Mechanical Systems.
Modular Construction/ Prefab	The undertaking of general contracts for the fabrication and/or assembly and installation of modular or prefabricated buildings.  The relocation of wood and steel frame modular buildings (type II buildings) is within this category
Painting	Application of paint to interior and exterior surfaces of buildings and preparation of such surfaces for the purpose of receiving a finish coat of paint, including such incidental or related work as is customarily performed by those in the painting trade.
Plumbing	Installation, renovation repair and maintenance of pipes, fixtures and other apparatus in buildings for bringing in and distributing the water supply and removing liquid and water-borne wastes, including such incidental or related work as is customarily performed by those in the plumbers' trade.  Certification in this category requires possession of a Massachusetts Master Plumber’s License.
Pumping Stations	The construction of pumping station buildings.  Contractors certified by DCAMM in General Building Construction and Sewage and Water Treatments Plants are automatically entitled to certification in Pumping Stations.  Certification of contractors in this category does not indicate any conclusion that a particular pumping station project should be bid pursuant to M.G.L., Chapter 149.
Roofing	The installation of various types of roofing materials to a building, including shingles, slate, rubber, PVC and related flashing and drainage systems.
Sewage and Water Treatment Plants	The undertaking of general contracts for construction of buildings used in the purification, reduction and disposal of sewage and/or the purification and distribution of water supplies.  Certification of contractors in this category does not indicate any conclusion that a particular water or sewer project should be bid under the provisions of M.G.L., Chapter 149.
Telecommunications Systems	Installation, repair and maintenance of telephone, intercom, television, computer network or related equipment for a major communication system within a building.
Waterproofing	Installation, renovation, repair or maintenance of materials required to make foundations, walls and other surfaces of a building damp-proof or impervious to water, including such incidental or related work as is customarily performed by those in the waterproofing and damp-proofing trade.  This category does not include roofing by itself

Additional Resources

Prime Categories of Work and Definitions

Filed sub-bidder categories of work and definitions

All filed sub-bidder categories of work are set forth in Massachusetts General Laws Chapter 149, Section 44F.
https://malegislature.gov/Laws/GeneralLaws/PartI/TitleXXI/Chapter149/Section44F 
 

Filed Sub Bidder Category of Work	Definition
Acoustical Tile	Installation of tile-shaped blocks of sound-absorbent material used for ceilings or as wall facing within a building
Electrical Work	Installation, renovation, repair and maintenance of electrical wiring, circuits, panel boards, fixtures and equipment within a building, including such incidental or related work as is customarily performed by those in the electricians' trade.  For companies that are incorporated, certification in this category requires possession of a Massachusetts Corporate Master Electrician’s License.
Elevators	The installation, maintenance and repair of elevators, handicapped accessible chair lifts, moving stairs, or dumbwaiters within a building
Fire Protection Sprinkler Systems	Installation, renovation, repair and maintenance of fire protection sprinklers in buildings including such incidental or related work as is customarily performed by those in the Fire Protection Sprinkler Systems' trade
Glass and Glazing	Installation and securing of glass in prepared openings in windows, door panels, screens, partitions, etc. that are not part of a correlated window system.
HVAC	Installation, renovation repair and maintenance of the systems and apparatus required, collectively or individually, to provide comfort heating, ventilation and/or cooling within or associated with a building, including such incidental or related work as is customarily performed by those in the HVAC trade.  This category does not include sheet metal work by itself.
Lathing and Plastering	The application of, but not limited to, plaster, Keene cement plaster, furring, metal and gypsum lathing, scratch coat and lathing for ceramic tile walls, and plaster ceiling suspension systems to a building.
Marble	Installation/application of marble, including but not limited to, toilet and shower compartments, counters, cladding, fixed furnishings including fountains, thin skin exterior and interior, granite and limestone walls and facings, marble and pre-cast terrazzo treads and risers, blue stone and slate walls and floors, and stone window stools and thresholds to a building.
Masonry Work	Installation, renovation, repair and maintenance of masonry units composed of concrete, stone, or brick which are part of a building, including such incidental or related work as is customarily performed by those in the masons' trade.
Metal Windows	Installation to a building of steel windows, aluminum windows, detention windows and screens and entrance and sidelight systems if a part of a correlated window system.
Miscellaneous and Ornamental Iron	Installation of miscellaneous and ornamental iron including, but not limited to, steel chairs, handrails and railings, ornamental metal, elevator ladders, ladders, balconies, catwalks, fire escapes, decorative grilles and screens, and any other non-standard metal items requiring custom fabrication and installation to a building.
Painting	Application of paint to interior and exterior surfaces of buildings and preparation of such surfaces for the purpose of receiving a finish coat of paint, including such incidental or related work as is customarily performed by those in the painting trade
Plumbing	Installation, renovation repair and maintenance of pipes, fixtures and other apparatus in buildings for bringing in and distributing the water supply and removing liquid and water-borne wastes, including such incidental or related work as is customarily performed by those in the plumbers' trade.  For companies that are incorporated, certification in this category requires possession of a Massachusetts Corporate Master Plumber’s License.
Resilient Floors	Installation of, but not limited to, vinyl tile, asphalt tile, rubber and other resilient tile, resilient sheet flooring, linoleum, resilient vinyl or rubber bases, resilient stair treads and adhesives to a building
Roofing and Flashing	The installation of various types of roofing materials to a building, including shingles, slate, rubber, PVC and related flashing and drainage systems
Terrazzo	Installation of terrazzo to a building including, but not limited to, sand cushion terrazzo floors, bond to concrete terrazzo floors, thin set terrazzo, conductive terrazzo floors, pre-cast terrazzo, and plastic-matrix terrazzo
Tile	Installation of tile which includes, but is not limited to, ceramic floor and wall tile, quarry tile, glass mosaic tile, special shapes, setting materials and accessories to a building.
Waterproofing, Damp-proofing, and Caulking	Installation, renovation, repair or maintenance of materials required to make foundations, walls and other surfaces of a building damp-proof or impervious to water, including such incidental or related work as is customarily performed by those in the waterproofing and damp-proofing trade.  This category does not include roofing by itself.

Additional Resources

Filed Sub-Bidders Categories of Work Definitions