L Definitions

Definition Categories

Labeled

Labeled appliances, equipment and components have the mark of an approved testing agency affixed to the appliance, equipment, or component att esting to the fact that they comply with an approved standard when installed according to manufacturer’s instructions. The term labeled is often used with the term listed.

Lateral

A lateral is a vent connector direction other than vertical in a single appliance vent system. Lateral length Lateral length is the total horizontal length of the vent connector in a single appliance vent system measured from the center of the vent connector at the draft hood or flue collar to the center of the vent where the connector connects with the vent.

Laundry tray

A laundry tray is a sink, usually located in a laundry area, used for various laundry related and other purposes. It is also known as a laundry sink or a deep sink. You may discharge a clothes washing machine into a laundry tray instead of into a standpipe.

Ledgers

 (1) A Ledger (also called a ribbon strip) is a horizontal support for floor joists that is attached near the bottom of a beam so that the tops of the floor joists are flush with the top of the beam. Ledgers  attached to wood beams used in residential framing are often 2×2 inches wood strips. Ledgers may also be attached to wall studs to support floor or ceiling joists that intersect perpendicular to the wall.

(2) A ledger is a horizontal support for deck and balcony floor joists that is attached to the house wall using bolts or lag screws.

Light (dry-niche)

A dry-niche light is installed in a wall below the water level and is sealed against water entry into the niche. Water does not surround the light fixture inside the niche

Light (no-niche)

A no-niche light is installed above or below water level without a niche.

Light (wet-niche)

A wet-niche light is installed in a wall below the water level and is not sealed against water entry into the niche. Water surrounds the light fixture inside the niche.

Light Fixture

The term light fixture includes incandescent, fluorescent, and LED lights that are flush-mounted, hanging, and recessed. The term also includes high intensity lights such as sodium and mercury-vapor lamps, and track lights. Note that ceiling fans are considered appliances (not light fixtures) and are covered in Chapter 41.

Lintel

A lintel is a piece of noncombustible material, usually a piece of steel, located above the firebox opening that supports the masonry above the firebox opening.

Listed (Listing)

Independent testing agencies maintain lists of appliances, equipment, and components used in the construction industry. The testing agency confirms that the appliances and components comply with an approved standard when installed according to manufacturer’s instructions. The term listed is often used with the term labeled. Listing and labeling are often required by the IRC for many manufactured appliances, equipment, and components.

Location (damp)

Damp locations are subject to moderate levels of moisture but are not subject to direct saturation by liquids. Examples of damp locations include covered porches and some basements. Many inspectors consider ceilings over showers and bathtubs as damp locations but the IRC does not specifically cite these as damp locations.

Location (wet)

Wet locations are subject to direct contact with liquids or the elements. Examples of wet locations include exterior house walls not protected by a roof, concrete and masonry in contact with the earth, and any components buried or in contact with the earth.

 

Low voltage

Low voltage when applied to swimming pool, spa, and hot tub underwater lights usually means not more than (≤) 15 volts alternating current (AC) or 30 volts continuous direct current (DC). Refer to the IRC for other voltage amounts for specialized low voltage underwater lights.