Top 100 Construction Terms and Definitions

The construction business is its own separate world, full of jargon that can confuse those not in the industry. If you are an experienced construction professional or a project manager, learning the building construction terms is important to communicate effectively and be successful in your projects. This list of 100 must-know words applies to everything from dirt riding basics to finishing touches, and it’s segmented into 9 clear categories so you can locate your needs easily.

Complete Category Overview

These 100 terms fall into 9 categories spanning the full range of construction disciplines. Here's a quick chart for reference.

100 Construction Terms and Definitions

Each term includes a brief, practical definition for quick reference. For ease of reference, the following list has been rearranged in standard alphabetical order by term (A–Z).

1. Aggregate: Particulate material made of sand or crushed stone; used in concrete and fundamental to building foundations.

2. All-In Rate: Total project expenses including all direct and indirect costs.

3. Backfill: Refilling excavated areas with soil or other materials to restore original grade or elevation around a foundation.

4. Beam: Horizontal structural member running along main walls at ceiling level, supporting the weight of the structure above.

5. Best Value Method: Procurement method where contractors are awarded bids based on price and quality measurements from past performance.

6. Bid: Formal proposal submitted by a contractor or subcontractor to perform work for a specific project.

7. Bid Selection: Process of examining and comparing contractors' bids to select the right one based on price and services.

8. Bid-Hit Ratio: Ratio of successful bids to total bids submitted on construction projects.

9. BIM (Building Information Modeling): 3-D modeling process that creates detailed virtual building models for planning, coordination, and management.

10. Blocking: Construction technique to join, fill, or reinforce the building structure between framing members.

11. Blueprint: Detailed architectural or engineering plan showing a building's dimensions, materials, and placement of elements.

12. BOQ (Bill of Quantities): Itemized contract document listing all materials and workmanship needed to price out a project.

13. Building Code: Set of regulations establishing minimum standards for building design, construction, and safety.

14. CAD (Computer-Aided Design): Architecture software used to create detailed building models and construction drawings.

15. Cant: An angled surface or line that cuts a corner off a structural element.

16. Caulking: Flexible, rubbery material used to seal gaps in joints between building elements.

17. Ceiling Joist: Parallel framing members that support ceiling loads and are themselves supported by load-bearing walls.

18. Change Order: Written order that changes the original scope of work, schedule, or price of a project.

19. Circuit Breaker: Switch in the electrical panel that shuts off power to specific parts of the building for safety.

20. Closeout: Final stage where all documents, warranties, and final payments are completed, and the project is turned over to the owner.

21. Concrete: Building material created by hardening a mixture of cement, gravel, sand, and water; forms the basis for slabs, columns, and other structural elements.

22. Concrete Slab: Horizontal platform used to construct the ceiling or the floor of a building.

23. Construction Management Software: Application used by construction managers to efficiently run projects, featuring accounting, documentation, and team workload tracking.

24. Cost Codes: Codes used to track budgets and expenses of labor activities and cost categories.

25. Course: Continuous row of concrete blocks, stones, or bricks in masonry construction.
26. Cross Bracing: Reinforcements in an X-shape that enhance a structure's stability and lateral resistance.
27. Cut and Fill: Process of leveling a construction site by removing soil (cut) from higher areas and adding it to lower areas (fill).

28. Daily Report: Document created by the foreman at day's end, detailing materials installed, crew info, safety incidents, and work completed.

29. Damp Proofing: Procedure used to keep interior drywall dry and prevent moisture absorption in foundations or walls.

30. Diagrid: Structure reinforcement technique using steel beams placed in diagonal grids for high-rise buildings.
31. Dimension: A measure between two points, used in the planning stage of construction.
32. Drywall: Panel made from gypsum plaster wrapped in cardboard; commonly used as a fundamental material for framing buildings.

33. Ducts: Piping or channels that carry air throughout a structure for HVAC systems.

34. Egress: A way of exiting a structure, such as a window or door; building codes require certain egress points in buildings.

35. Elevation Drawing: Drawing showing the front or side view of a building's facades.

36. Encasement: The encasing of underground pipes in concrete or encasing hazardous materials after installation.

37. Falsework: Temporary structure used to support an arch or bridge during construction or repair.

38. Field Measure: Measurements taken directly inside the structure, not relying on blueprint dimensions.
39. Field Work Order: Document from the general contractor to a subcontractor regarding work not included in the original scope.
40. Floor Plan: Drawing showing the building's layout from an overhead view, detailing each room space.
41. Foreman: Leading supervisor at the construction site in charge of work crews; ensures daily tasks are performed and creates progress documents.
42. Formwork: Temporary molds or structures used to support concrete while it sets or hardens.
43. General Contractor: Main contractor responsible for overall project oversight, managing subcontractors, scheduling, and monitoring the budget.

44. Girder: Main horizontal support of a structure that supports smaller beams; often has an I-beam cross-section.

45. GMP (Guaranteed Maximum Price): Contract where the contractor is paid for actual costs incurred plus a fixed fee, with a price ceiling cap.

46. HVAC: Abbreviation for heating, ventilation, and air conditioning systems.

47. I-beam: A beam with a cross-section shaped like the capital letter I; commonly used for girders.

48. IFB (Invitation for Bid): Request given to contractors to submit a project proposal regarding their services and products.

49. Insulation: Material designed to prevent heat from leaving or entering a building; placed within walls, ceilings, or floors.

50. Job Costing: Calculation of total project cost including labor, materials, and overhead to determine profitability and ensure accurate billing.

51. Joint: Interface between two separate building elements that overlap or align without physical connection.

52. Joist: Parallel framing members that support ceiling or floor loads; supported by larger beams, girders, or bearing walls.
53. King Stud: Framing member running from bottom to top of a panel or sheet, providing continuous support.

54. Lath: Metal wire or wood strips on the frame of a building serving as a base for laying stucco or plaster.

55. Lien: Property claim made by the contractor against the owner when they are not paid for completed work.

56. Lift Slab Construction: Construction method where concrete slabs are cast at ground level and then lifted into place using hydraulic jacks.

57. Load-Bearing Wall: Wall that carries the load of the structure above it; cannot be removed without compromising structural integrity.

58. Lump Sum Contract: Contract where a single fixed price is quoted for the entire construction project.

59. MEP: Abbreviation for Mechanical, Electrical, and Plumbing—the technical systems that make a building habitable.
60. Moling: Pneumatically-driven device inserted into the ground to create holes for pipes, heat pump systems, and underground utilities.
61. Mortar: Paste used to bind stones, bricks, and other masonry units in wall construction.
62. Particle Board: Substitute for plywood composed of sawdust mixed with resin and compressed.
63. Plywood: Panel made from multiple layers of wood veneer compressed together for strength and stability.
64. Precast Concrete: Concrete elements created off-site and transported to the construction site for final assembly.
65. Prefabrication: Construction method involving manufacturing building components or entire structures off-site in a factory environment.
66. Prevailing Wage: Minimum hourly wage and benefits required by law to be paid to workers on public construction projects.
67. Project Manager: Oversees the entire management of the construction project, including deliverables, schedules, and budgets.
68. Punch List: List of unfinished or defective items that need to be completed or fixed before a project can be considered complete.
69. Punch-Out: Final inspection and correction of any outstanding items or deficiencies before project completion.
70. Purchase Order (PO): Document from the buyer indicating intent to purchase services and products from the seller, such as a supplier.
71. Purlin: Horizontal and longitudinal beam used on the roof structure to support rafters.
72. PVC: Short for polyvinyl chloride; common plastic used most frequently for water pipes and sometimes for flooring.
73. Rafter: Series of roof frame pieces connected to the supports that hold up the roofing and sheathing.
74. Retainage: Portion of the contract price withheld by the owner or general contractor until project completion to ensure the contractor's performance.
75. RFI (Request for Information): Preliminary document containing general information about capabilities provided by potential vendors or suppliers.
76. RFP (Request for Proposal): Document requesting proposals from vendors to obtain an overview of their costs and offerings for specific services.
77. RFQ (Request for Quote): Document featuring predetermined specifications, requesting the vendor's costs to fulfill them.
78. Rim Joist: In flooring, a rim joist attached to the end of the main joists to provide lateral support.
79. Rough-In: Stage where mechanical, electrical, and plumbing lines are brought into the project; basic framing is complete but final connections are not yet made.
80. RTT (Request for Tender): Formal invitation to vendors to submit their bid to supply products and services to the construction project.
81. Rubblization: Process where unwanted concrete is broken down into small pieces used as base material for new surfaces.
82. Schedule of Values: Project work item list that corresponds each item to its value, representing the total contract amount.
83. Scope of Work (SOW): Detail in the agreement outlining exactly what work will be performed for the project.
84. Section Drawing: Drawing showing the building as if cut on a vertical plane, revealing internal construction details.
85. Shoring: Construction method using wood or metal props to support a structure while work is performed temporarily.
86. Skirting: Material that covers the joint between the floor and an interior wall for aesthetic purposes.
87. Stucco: Material made from aggregates, a binder, and water; often used as a decorative coating on walls and ceilings.
88. Subcontractor: Specialist in a specific construction trade (e.g., electrical, plumbing) hired by the general contractor.
89. Submittal: Formal process of submitting shop drawings, product data, and samples to the design team for approval before installation.
90. Superstructure: A structure that is built on top of another structure, such as floors above the foundation.
91. Takeoff: Document that lists the types and quantities of materials required for the construction project.
92. Tender: Contractor's or supplier's submission response about supplies and services they can offer when receiving a bid invitation.
93. Time Tracking: Process of monitoring and recording employee work hours for payroll and project management purposes.
94. Toolbox Talks: Short safety meetings conducted regularly to discuss job-specific hazards and safe work practices.
95. Trim: Materials used to provide a clean finish, such as moldings around window and door openings or baseboards in rooms.
96. Underpinning: Construction technique to strengthen the foundation of an existing structure using beams, concrete, or base pinning.
97. Value Engineering: Process of optimizing a project's value by reducing costs while maintaining or improving functionality and quality.
98. Veneer: Very thin sheet of wood, typically a finer wood used as decorative cover for lower-quality wood.

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99. Warping: A distortion of material, which can be a sign of water damage or improper installation.

100. Zoning: Government regulations that dictate how property areas can be used and what can be built on them.

Conclusion

The building industry is constantly changing as new technology and methods become available, but learning these basic terms for building construction is still a must to be able to understand and communicate. From aggregate to zoning, these constructed terms represent the language of the building industry—a language that every professional should speak fluently.