Deck Construction - Glossary

A
Anchor Bolt: A metal bolt embedded in concrete to secure a post base or footing.
Apron: A trim board installed below the decking, running to the ground for a finished look; also called skirting.
Awning: A cover or shade structure added to decks for weather protection.

B
Baluster: A vertical post or spindle supporting a railing.
Beam: A horizontal structural member that supports the weight of the deck and transfers loads to posts.
Bearing Capacity: The ability of soil to support the load applied by the deck’s footings.
Board Foot: A lumber measurement equivalent to 12 inches by 12 inches by 1 inch.
Blocking: Short wood pieces placed between joists for added stability and weight distribution.
Bracing: Diagonal supports used to strengthen the deck and prevent lateral movement.
Bridging: Cross-members installed between joists to distribute loads and reduce movement.

C
Cantilever: A deck section extending beyond its supporting beam or post, creating an overhang.
Cap Rail: The top horizontal member of a railing system, often providing a finished look and hand support.
Cleat: A small strip of wood or metal used for additional support or anchoring.
Composite Decking: A decking material made from wood fibers and plastic, known for durability and low maintenance.
Cupping: A type of wood warping where the edges curve upward or downward, forming a cup shape.
Crown: The upward curve or bow in a piece of lumber; the crown should always face up during installation.

D
Deck Board: The flat planks that form the walkable surface of a deck.
Deck Joist: Horizontal framing members that support the decking boards, typically spaced 12", 16", or 24" apart.
Drop Beam: A beam installed below the joists instead of flush with them.
Dead Load: The weight of permanent deck materials like framing and decking.
Drainage System: A system designed to channel water away from the deck and prevent pooling.
10d Nail: A common 3-inch nail used in framing; the "d" stands for "penny" size.

E
Excavation: The process of removing soil to create space for footings or piers.
Expansion Joint: A gap between boards to allow for natural expansion and contraction due to temperature changes.
Edge Banding: A decorative strip covering the edges of a deck for a polished finish.Also known as Picture Frame.

F
Fascia: A horizontal trim board installed to cover the rim joist or beam for a finished look.
Flashing: A waterproof material that prevents water infiltration, usually installed between a ledger board and the house.
Floating Deck: A freestanding deck built on top of concrete blocks or pads rather than footings.
Footing: A concrete base that anchors deck posts and transfers loads to the ground.

G
Girder: A large beam that supports joists or additional framing; typically used in more complex deck designs.
Grade: The ground level around a deck or the quality rating of lumber.
Grain: The natural pattern or texture of wood, affecting strength and appearance.
Guardrail: A safety barrier installed along the edges of a deck to prevent falls.

H
Hardscape: Man-made outdoor surfaces like patios or walkways incorporated into a deck project.
Hanger: A metal bracket used to secure joists or beams to other structural components.
Handrail: A rail used for support, typically installed on staircases or along railings.
Hurricane Tie: Metal connectors that secure joists to beams, providing resistance to uplift forces.

I
IRC (International Residential Code): A set of building codes that provide standards for safe deck construction.
I-Joist: Engineered wood joists designed for long spans and uniform strength.

J
Joist Span: The distance a joist can safely span between supports without sagging.
Joist Hanger: Metal hardware used to attach joists to beams or ledgers.

K
Kicker: Texas slang for a small brace or angled support used to stabilize posts or beams.
Kick Board: Another term for a stair riser.

L
Ledger Board: A horizontal board attached to a house that supports one side of the deck frame.
Live Load: The weight a deck must support from people, furniture, and other temporary items.
LVL (Laminated Veneer Lumber): Engineered wood beams made from thin layers of wood bonded together for greater strength and stability.

M
Moisture Barrier: A layer that protects deck components from water damage.
Miter Cut: A precise angled cut used to create clean corners in trim or railings.
Multi-Ply Beam: A beam constructed from two or more layers of lumber nailed or screwed together.

N
Nailer: A secondary framing member used to provide extra support or attachment points.
Notched: A cut made in a post or beam to allow for a secure fit with another structural member.
Nosing: The rounded edge of a stair tread that extends slightly beyond the riser.

P
Pier: A vertical concrete support for deck posts.
Ply: Refers to the number of layers in a beam, e.g., a 3-ply beam has three layers of lumber.
Post Anchor/Post Base: A metal bracket securing a deck post to a footing or pier.

R
Railing: A protective barrier around the perimeter of a deck, typically required by code for safety.
Rise and Run: The height (rise) and depth (run) of individual stair steps.
Rim Joist: The outermost joist that runs along the perimeter of the deck, supporting the ends of the interior joists.

S
Sheathing: Plywood or OSB used for structural strength, often in roof deck construction.
Skirting: Material that covers the space between the deck and the ground; also called an apron.
Sonotube: A cylindrical form used to pour concrete footings for deck posts.
Spacing (OC): The distance between framing members measured from the center of one member to the center of the next (e.g., 16" OC).
Splice: The joint where two pieces of lumber are joined together to extend their length.
Stringer: A sloped board that supports stair treads.
Subframe: The framework beneath a deck, including posts, beams, and joists.

T
Toe-Nail: A method of driving nails at an angle to fasten lumber together.
Tread: The horizontal surface of a stair step.
Treated Lumber: Wood chemically treated to resist rot, insects, and moisture.
Tuff Block: A lightweight, composite deck footing designed for floating decks and easy installation.
Turnbuckle: A device used for tightening or adjusting tension in cables or braces.

U
Understructure: The structural framework supporting the deck, consisting of posts, beams, and joists.
Uplift: The force that can lift deck components, often caused by wind or soil movement.

W
Warping: A wood defect where boards bend or twist due to moisture or heat exposure.
Wedge Anchor: A metal anchor used to secure posts or other components to concrete footings or slabs.
Wrangle: Texas slang for managing a difficult or labor-intensive task, like positioning a heavy beam.
Weathering: The natural aging and deterioration of wood due to exposure to the elements.

Y
Yard: Short for cubic yard. The volume of space measuring 3’ x 3’ x 3’. It is how volumes of dirt, sand, and other aggregates are typically measured.

Z
Z-Flashing: A Z-shaped metal flashing that prevents water infiltration, often used above ledger boards.
ZMAX Wood-to-Wood Cap: A corrosion-resistant metal bracket used to secure beams to posts, providing a strong connection.