6-digit U.S. detail
238140
石材工事会社
Description
この産業は、主に石材工事、石積み、レンガ積み、およびその他の石材工事に従事する事業所で構成されています。 実施される作業には、新築、増築、改修、メンテナンス、および修理が含まれる場合があります。 例: レンガ積み 大理石、石材、スレート、外壁、請負業者 レンガ積み 石材の接着、清掃、またはシーリング コンクリートブロックの積み スチュコ請負業者 基礎（例：レンガ、ブロック、石材）、建築、請負業者
Hierarchy
| Code | Title | Description |
|---|---|---|
| 23 | Construction 2-digit sector | The Sector as a Whole The Construction sector comprises establishments primarily engaged in the construction of buildings or engineering projects (e.g., highways and utility systems). Establishments primarily engaged in the preparation of sites for new construction and establishments primarily engaged in subdividing land for sale as building sites also are included in this sector. Construction work done may include new work, additions, alterations, or maintenance and repairs. Activities of these establishments generally are managed at a fixed place of business, but they usually perform construction activities at multiple project sites. Production responsibilities for establishments in this sector are usually specified in (1) contracts with the owners of construction projects (prime contracts) or (2) contracts with other construction establishments (subcontracts). Establishments primarily engaged in contracts that include responsibility for all aspects of individual construction projects are commonly known as general contractors, but also may be known as design-builders, construction managers, turnkey contractors, or (in cases where two or more establishments jointly secure a general contract) joint-venture contractors. Construction managers that provide oversight and scheduling only (i.e., agency) as well as construction managers that are responsible for the entire project (i.e., at risk) are included as general contractor type establishments. Establishments of the "general contractor type" frequently arrange construction of separate parts of their projects through subcontracts with other construction establishments. Establishments primarily engaged in activities to produce a specific component (e.g., masonry, painting, and electrical work) of a construction project are commonly known as specialty trade contractors. Activities of specialty trade contractors are usually subcontracted from other construction establishments, but especially in remodeling and repair construction, the work may be done directly for the owner of the property. Establishments primarily engaged in activities to construct buildings to be sold on sites that they own are known as for-sale builders, but also may be known as speculative builders or merchant builders. For-sale builders produce buildings in a manner similar to general contractors, but their production processes also include site acquisition and securing of financial backing. For-sale builders are most often associated with the construction of residential buildings. Like general contractors, they may subcontract all or part of the actual construction work on their buildings. There are substantial differences in the types of equipment, work force skills, and other inputs required by establishments in this sector. To highlight these differences and variations in the underlying production functions, this sector is divided into three subsectors. Subsector 236, Construction of Buildings, comprises establishments of the general contractor type and for-sale builders involved in the construction of buildings. Subsector 237, Heavy and Civil Engineering Construction, comprises establishments involved in the construction of engineering projects. Subsector 238, Specialty Trade Contractors, comprises establishments engaged in specialty trade activities generally needed in the construction of all types of buildings. Force account construction is construction work performed by an enterprise primarily engaged in some business other than construction for its own account, using employees of the enterprise. This activity is not included in the construction sector unless the construction work performed is the primary activity of a separate establishment of the enterprise. The installation and the ongoing repair and maintenance of telecommunications and utility networks is excluded from construction when the establishments performing the work are not independent contractors. Although a growing proportion of this work is subcontracted to independent contractors in the Construction sector, the operating units of telecommunications and utility companies performing this work are included with the telecommunications or utility activities. |
| 238 | Specialty Trade Contractors 3-digit subsector | The Specialty Trade Contractors subsector comprises establishments whose primary activity is performing specific activities (e.g., pouring concrete, site preparation, plumbing, painting, and electrical work) involved in building construction or other activities that are similar for all types of construction, but that are not responsible for the entire project. The work performed may include new work, additions, alterations, maintenance, and repairs. The production work performed by establishments in this subsector is usually subcontracted from establishments of the general contractor type or for-sale builders, but especially in remodeling and repair construction, work also may be done directly for the owner of the property. Specialty trade contractors usually perform most of their work at the construction site, although they may have shops where they perform prefabrication and other work. Establishments primarily engaged in preparing sites for new construction are also included in this subsector. There are substantial differences in types of equipment, work force skills, and other inputs required by specialty trade contractors. Establishments in this subsector are classified based on the underlying production function for the specialty trade in which they specialize. Throughout the Specialty Trade Contractors subsector, establishments commonly provide both the parts and labor required to complete work. For example, electrical contractors supply the current-carrying and noncurrent-carrying wiring devices that are required to install a circuit. Plumbing, heating, and air-conditioning contractors also supply the parts required to complete a contract. Establishments that specialize in activities primarily related to heavy and civil engineering construction that are not normally performed on buildings, such as the painting of lines on highways, are classified in Subsector 237, Heavy and Civil Engineering Construction. Establishments that are primarily engaged in selling construction materials are classified in Sector 42, Wholesale Trade, or Sector 44-45, Retail Trade, based on the characteristics of the selling unit. |
| 2381 | Masonry Contractors 4-digit industry group | This industry group comprises establishments primarily engaged in the specialty trades needed to complete the basic structure (i.e., foundation, frame, and shell) of buildings. The work performed may include new work, additions, alterations, maintenance, and repairs. |
| 23814 | Masonry Contractors 5-digit NAICS industry | See industry description for 238140. |
| 238140 | 石材工事会社 6-digit U.S. detail | この産業は、主に石材工事、石積み、レンガ積み、およびその他の石材工事に従事する事業所で構成されています。 実施される作業には、新築、増築、改修、メンテナンス、および修理が含まれる場合があります。 例: レンガ積み 大理石、石材、スレート、外壁、請負業者 レンガ積み 石材の接着、清掃、またはシーリング コンクリートブロックの積み スチュコ請負業者 基礎（例：レンガ、ブロック、石材）、建築、請負業者 |
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Classification References
- 01コンクリートを打って建物の基本的な構造を建設すること--は238110、コンクリート基礎および構造の請負業者に分類されます。
- 02大理石、石英石、石英板の室内工事--は238340、タイルおよびテラゾー請負業者に分類されます。
- 03パティオ、歩道、ドライブウェイ用のプレキャストの石やレンガを敷くこと、または住宅のドライブウェイ、商業用駐車場、その他の私有駐車場を舗装すること--は238990、その他の専門職請負業者に分類されます。
Index Items
レンガのベニア、設置
レンガの設置業者
セメントブロックの設置
煙突、レンガ、ブロックまたは石、請負業者
シンドブロックの設置
コンクリートブロックの設置
野石（つまり、石工）の設置
暖炉、石工、設置
基礎（例：レンガ、ブロック、石）、建設、請負業者
ガラスブロックの設置
ガラスユニット（つまり、ガラスブロック）の石工
大理石、外装、請負業者
大理石、石英石、石英板、外装、請負業者
石工
石工の補修、清掃またはシーリング
耐火レンガの請負業者
擁壁、石工（つまり、ブロック、レンガ、石）、建設
石英板（つまり、石工）の請負業者
石工（つまり、石工）の請負業者
スチュコ請負業者
補修請負業者
How Item Can Help
Automates inventory tracking for varied materials like bricks and cement to minimize theft and spoilage, while optimizing space utilization for seasonal demand spikes.
Optimizes routing for heavy delivery vehicles to reduce fuel costs and delivery times, ensuring timely arrival of bulk materials for critical construction projects.
Streamlines the processing of complex, multi-item B2B orders from builders to improve accuracy and enable real-time status tracking for clients.
Item.com Tools
External Resources
Census.gov NAICS Detail
Official US Census Bureau definition and scope for NAICS 238140.
National Masonary Contractors Association
Trade association representing the majority of masonry contractors with resources for licensing and safety.
U.S. Department of Labor - Occupations in Construction, Forestry, and Mining
Government page providing official data on job requirements and safety standards for masonry workers.
National Association of Home Builders - Masonry Division
Industry directory linking builders with qualified masonry subcontractors for residential projects.
