Construction Glossary

A

Abutment

A structure that supports the end of a bridge or other structure.

Addendum

A document that adds to or amends a contract.

Aggregate

Inert material such as sand, gravel, or crushed stone used in concrete.

Allowance

A sum of money set aside in a contract for a specific item or work.

Anchor Bolt

A metal bolt embedded in concrete to secure fixtures.

Architect of Record

The architect legally responsible for the design of a building.

As-Built Drawings

Drawings that show the actual construction of a project, including any changes made.

ASTM (American Society for Testing and Materials)

An organization that develops and publishes standards for materials, products, systems, and services.

B

Backfill

Soil used to fill in an excavation.

Bearing Wall

A wall that supports the weight of the structure above it.

Beam

A horizontal structural member that supports loads.

Blueprint

A photographic print of a technical drawing.

Bond

A method of laying bricks or blocks to create a strong structure.

C

Caulk

A sealant used to fill gaps and prevent leaks.

Change Order

A document that modifies the terms of a contract.

Circuit Breaker

A safety device that automatically interrupts an electrical circuit in case of overload.

Civil Engineering

The branch of engineering that deals with the design, construction, and maintenance of public works.

Concrete

A composite material made from cement, aggregate, and water.

Contractor

A person or company that contracts to provide services or supplies.

Coping

The top course of masonry or concrete that covers the edge of a wall or structure.

Cross-bracing

Diagonal bracing used to strengthen a structure.

D

Dead Load

The weight of the building materials themselves.

Deck

A platform or floor built above ground level.

Demolition

The act of tearing down a building or structure.

Diaphragm

A structural element that resists lateral forces, such as wind or earthquake.

Dimension

A measurement of length, width, or height.

Drawing

A graphical representation of a design or plan.

Drywall

A gypsum board used for interior walls and ceilings.

E

Elevation

A drawing that shows the front, side, or rear view of a building.

Engineer

A person trained and licensed to design and supervise the construction of public and private works.

Excavation

The process of digging or removing earth.

Expansion Joint

A joint in a structure that allows for movement due to temperature changes.

Facade

The front or face of a building.

Fastener

A device used to join two or more pieces of material together, such as a nail, screw, or bolt.

Fenestration

The arrangement of windows in a building.

Finish

The final surface treatment of a material, such as paint or plaster.

Foundation

The lowest part of a building, which supports the entire structure.

Framing

The structural framework of a building, typically made of wood or steel.

G

Grade

The slope of the ground.

Gravel

Small, rounded stones.

Grid

A network of lines used for reference in design and construction.

Gutter

A channel that carries rainwater away from the roof.

H

A horizontal beam used to support the ends of joists or rafters.

HVAC

Heating, ventilation, and air conditioning.

Hydrostatic Pressure

The pressure exerted by water.

I

Insulation

Material used to reduce heat transfer.

Interior Design

The art and science of designing the interior spaces of a building.

Ironworker

A worker who fabricates and erects steel structures.

J

Joist

A horizontal structural member that supports a floor or ceiling.

Joint

The junction between two or more parts of a structure.

K

Kickboard

A low board or molding at the base of a wall.

L

Landscaping

The art of designing and creating outdoor spaces.

Lath

A material used to support plaster.

Load-Bearing

Capable of supporting weight.

Louver

A slatted opening that allows for ventilation.

M

Masonry

The art of building with brick, stone, or concrete blocks.

MEP

Mechanical, electrical, and plumbing systems.

Millwork

Woodwork produced in a mill, such as doors, windows, and moldings.

Mortar

A mixture of cement, sand, and water used to bond bricks or blocks together.

N

Non-Load-Bearing

Not capable of supporting weight.

O

On-Center (O.C.)

The distance between the centers of two parallel members, such as studs or joists.

Overlay

A layer of material placed over another.

P

Permit

Official permission to proceed with construction.

Pier

A vertical support for a structure.

Pile

A long, slender member driven into the ground to support a foundation.

Pitch

The slope of a roof.

Plan

A drawing that shows the arrangement of a building or structure.

Plumbing

The system of pipes and fixtures for water supply and drainage.

Post

A vertical support for a structure.

Pressure-Treated Wood

Wood that has been treated with chemicals to resist decay and insect damage.

Project Manager

The person responsible for overseeing all aspects of a construction project.

Q

Quarry

A place where stone is extracted.

R

Rafter

A sloping structural member that supports the roof.

Rebar

Steel reinforcement bars used in concrete.

Roofing

The covering of a roof.

Rough-in

The initial installation of plumbing, electrical, and mechanical systems.

S

Scaffolding

A temporary structure used to support workers and materials during construction.

Schedule

A plan for the timing and sequencing of work activities.

Sheathing

The covering applied to the exterior of a building, such as plywood or OSB.

Site Plan

A drawing that shows the layout of a construction site.

Slab

A flat, horizontal concrete surface.

Soffit

The underside of an overhanging part of a building, such as a roof or cornice.

Soil

The loose surface material of the earth.

Span

The distance between two supports.

Specification

A detailed description of the materials and methods to be used in construction.

Steel

A strong alloy of iron and carbon.

Stud

A vertical framing member in a wall.

Subcontractor

A contractor who is hired by a general contractor to perform specific work.

Subgrade

The layer of soil beneath the base course of a pavement.

Superstructure

The part of a building above ground level.

T

Template

A pattern used as a guide for cutting or shaping materials.

Tender

A formal offer to undertake work at a specified price.

Tile

A thin, flat piece of ceramic, glass, or other material used for covering walls or floors.

Timber

Wood suitable for use in construction.

Tolerance

The allowable variation from a specified dimension or value.

Trim

Decorative moldings used to finish the edges of doors, windows, and walls.

U

Underlayment

A layer of material placed beneath a finished floor covering.

Utility

A public service, such as water, gas, or electricity.

V

Vapor Barrier

A material that prevents the passage of water vapor.

Veneer

A thin layer of decorative material, such as wood or stone, applied to a surface.

Vibration

A rapid back-and-forth motion.

W

Wall Stud

A vertical framing member in a wall.

Waterproofing

The process of making a structure waterproof.

Weatherproofing

The process of protecting a structure from the effects of weather.

Welding

The process of joining metals by heating them to their melting point.

Window

An opening in a wall that allows light and air to enter.

Wood Framing

A system of construction using wood members.

Workmanship

The quality of work performed by a craftsman.

Y

Yield

The amount of material produced.

Z

Zoning

The regulation of the use of land and buildings within a specific area.

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