Deck

A deck is a flat, horizontal surface designed for occupancy or as a structural floor. It commonly appears as an outdoor extension of a building, such as a porch or terrace, or as a deck on a ship or boat. Decks are constructed for recreation, access, or work, and vary in material, orientation, and load requirements depending on local building codes and climate.

Residential and commercial decks are typically elevated above ground and supported by a framework of joists, beams, and posts. The surface is covered with decking material, including wood, composite, or vinyl boards. Features often include stairs, guardrails, posts, fasteners, and flashing to prevent water intrusion. Maintenance involves cleaning, sealing or staining, and periodic inspection for rot, corrosion, or loose connections, with codes guiding permits and load limits.

In maritime contexts, a deck refers to any defined horizontal surface forming a floor between or on top of compartments and superstructures. Decks are named by location, such as the main deck or weather deck, and are typically constructed from steel, aluminum, or timber. They accommodate hatches, ladders, rails, and fittings, and are designed to be watertight and capable of withstanding environmental exposure and shipboard loads.

A deck of playing cards is a set used for card games. A standard deck contains 52 cards in four suits, plus sometimes one or two jokers. Cards are ranked from ace to king, and players draw, deal, and discard as games require. Variants use alternative decks, such as tarot, or adjust the card count for games like canasta or pinochle. Deck-building is a common concept in games and simulations.