IBC 2021 Chapter 2 Definitions L-N

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Questions and Answers

What is an L rating?

The fire resistance rating of a wall

The air leakage rating of a firestop system (correct)

The load rating of a building

The acoustical rating of windows

What does a label provide on a product?

Identification by the manufacturer including characteristics and approval agency.

What defines a laboratory suite?

A fire-rated enclosed area providing laboratory spaces with ancillary uses.

Life Safety Systems enhance evacuation and smoke control.

True Signup and view all the answers

What is the lowest floor defined as?

The lowest enclosed area excluding certain structures. Signup and view all the answers

What is a Load Factor?

A factor considering uncertainties in load analysis Signup and view all the answers

What is defined as a Liquid?

A material with a melting point less than or equal to 68°F. Signup and view all the answers

What characterizes a Live/Work Unit?

A unit with residential and commercial use Signup and view all the answers

A membrane penetration allows the passage of items through a breach in a wall assembly.

True Signup and view all the answers

A _______ is a room classified as Group H-3 for flammable liquids storage.

Liquid Storage Room Signup and view all the answers

What does the term 'Mass Timber' refer to?

Structural elements of Type IV construction primarily made of solid wood products. Signup and view all the answers

What is the special nailing pattern required by design at the edges of each panel within the assembly of a diaphragm or shear wall?

Edge Nailing Signup and view all the answers

What does nailing, field refer to?

Nailing required between the sheathing panels and framing members at locations other than boundary nailing and edge nailing. Signup and view all the answers

What is defined as naturally durable wood?

The heartwood of specific species, with 90% or more of the width on each side being heartwood. Signup and view all the answers

Which of the following woods are considered decay resistant?

Cedar Signup and view all the answers

Which of the following species of wood are considered termite resistant?

Alaska Yellow Cedar Signup and view all the answers

What are nominal loads?

The magnitudes of the loads specified in Chapter 16, including dead, live, soil, wind, snow, rain, flood, and earthquake. Signup and view all the answers

What does nominal size (lumber) refer to?

The commercial size designation of width and depth in standard sawn lumber, larger than the standard net size. Signup and view all the answers

What is a noncombustible membrane structure?

A membrane structure in which the membrane and all component parts are noncombustible. Signup and view all the answers

What is noncombustible protection for mass timber?

Noncombustible material designed to increase fire-resistance rating and delay combustion. Signup and view all the answers

What is nonstructural concrete?

Any element made of plain or reinforced concrete that is not part of a structural system. Signup and view all the answers

What does normal temperature and pressure (NTP) refer to?

A temperature of 70°F and a pressure of 1 atmosphere. Signup and view all the answers

What is the nosing in stair construction?

The leading edge of treads of stairs and landings at the top of stairway flights. Signup and view all the answers

What is a nuisance alarm?

An alarm caused by mechanical failure, malfunction, improper installation, or maintenance. Signup and view all the answers

What are nursing homes?

Facilities that provide care, including intermediate care and skilled nursing for persons incapable of self-preservation. Signup and view all the answers

Study Notes

L Words: Definitions and Context

L Rating: Measures air leakage of firestop systems or fire-resistant joints, tested according to UL 1479 or UL 2079 standards.
Label: Manufacturer's identification tag indicating product characteristics and compliance with approved agency standards.
Labeled: Denotes products marked by recognized testing laboratories, confirming they meet specific standards after evaluation.
Laboratory Suite: Enclosed, fire-rated area within educational facilities that includes laboratories, offices, and corridors.
Life Safety Systems: Devices and equipment aiding in evacuation, smoke control, and compartmentalization.
Light-diffusing System: Construction featuring light-transmitting plastics used to distribute light from electrical sources, excluding internal fixture parts.
Light-Frame Construction: Structural framework primarily composed of repetitive wooden or cold-formed steel members.
Light-Transmitting Plastic Roof Panels: Plastic panels on roofs that allow light transmission, distinct from skylights.
Light-Transmitting Plastic Wall Panels: Exterior wall materials made of plastic that transmit light, securely fixed to structure.
Limit of Moderate Wave Action: Indicates the inland border of wave action during base flood events on Flood Insurance Rate Maps (FIRMs).
Limit State: A condition where a structure is unfit for use or unsafe, categorized as either serviceability or strength limit states.
Liquid: Defined as materials with melting points ≤68°F and boiling points >68°F, encompassing both flammable and combustible liquids.
Liquid Storage Room: A designated area classified as H-3 occupancy for safely storing flammable liquids.
Liquid Use, Dispensing, and Mixing Room: Room for managing flammable liquids in open containers.
Listed: Products evaluated by an acceptable authority, confirming they meet certain standards.
Live Load: Loads resulting from building occupancy that excludes environmental or construction-related forces.
Live Load, Roof: Roof loads from maintenance activities or non-permanent decorative elements.
Live/Work Unit: Living space primarily allocated for nonresidential use by occupants.
Load and Resistance Factor Design (LRFD): A structural design method ensuring safety under various load conditions.
Load Effects: Forces and deformations on structural members caused by applied loads.
Load Factor: Accounts for variances between actual and nominal loads, including simultaneous extreme load probabilities.
Loads: Actions from weight, occupants, environmental factors, and structural changes, categorized into permanent and variable loads.
Lodging House: A dwelling with long-term occupants renting guest rooms.
Lot: Defined as a parcel of land viewed as a single unit.
Lot Line: Boundary marking the edges of a lot against others or public spaces.
Low-Energy Power-Operated Door: Automatic doors responding to pedestrian actions, opening and closing with reduced force and speed.
Lower Flammable Limit (LFL): Minimum vapor concentration in air for flame propagation in the presence of ignition.
Lowest Floor: The bottom floor of a building, includes basements but excludes unfinished enclosures.
Main Windforce-Resisting System: A structural framework that provides overall stability against wind forces.
Manual Fire Alarm Box: A device that allows manual activation of fire alarms.
Manufacturer's Designation: Identification by a manufacturer ensuring product compliance with standards.
Mark: Abstract identification representing manufacturer information and product function.
Marquee: A sloped canopy structure positioned near entrances.
Masonry: Construction using various units, bonded together by mortar or grout.
Glass Unit Masonry: Masonry consisting of glass units attached with mortar.
Plain Masonry: Focuses on tensile resistance without considering reinforcing stresses.
Reinforced Masonry: Incorporates reinforcement to enhance structural integrity.
Solid Masonry: Masonry where units are tightly laid with mortar-filled joints.
Unreinforced (Plain) Masonry: Similar to plain masonry but accounts for the tensile strength of the material.
Masonry Unit: Defined construction blocks such as brick or concrete that meet specified standards.
Masonry Unit - Hollow: A unit with less than 75% net cross-sectional area compared to the gross area.
Masonry Unit - Solid: A unit with 75% or more net cross-sectional area relative to the gross area.
Mass Timber: Type IV construction using substantial engineered wood products that adhere to defined dimensions.
Mastic Fire-Resistant Coatings: Protective liquid mixtures applied to substrates for fire resistance.
Means of Egress: A clear path from occupied spaces to a public escape route, comprising exit access, exit, and discharge.
Mechanical Equipment Screen: Rooftop structures that conceal utilities from view.
Mechanical-Access Enclosed Parking: Parking garages that utilize mechanical devices, limiting public access.
Mechanical-Access Open Parking Garages: Similar to enclosed garages, but open to the environment above street level.
Medical Care: Treatment involving surgical, nursing, or psychiatric assistance.
Membrane Penetration: Openings made in assemblies to accommodate installations.
Membrane-Covered Cable Structure: A nonpressurized structure utilizing a cable-mast support system for the weather barrier.
Membrane-Covered Frame Structure: A rigid framework supporting a tensioned membrane as a weather barrier.
Membrane-Penetration Firestop: A mechanism to resist fire through openings accommodating various installations.
Membrane-Penetration Firestop System: A fire-resistance-rated system designed to resist flame and heat spread through penetrations.
Merchandise Pad: A display area for products, surrounded by aisles or fixtures, facilitating customer access.
Metal Composite Material (MCM): Factory-made panels with bonded metal skins and solid plastic cores.
Metal Composite Material (MCM) System: Specific assemblies of MCMs for exterior wall coverings.
Metal Roof Panel: Interlocking sheets with defined minimum weather exposure.
Metal Roof Shingle: Smaller interlocking metal sheets with reduced weather exposure.
Mezzanine: An intermediary level between floor and ceiling in a structure.
Micropile: Deep foundation elements secured in place by grout, developed for load capacity.
Mineral Board: Thermal insulation boards made from mineral fibers or expanded aggregates.
Mineral Fiber: Insulation woven from rock, slag, or glass fibers.
Mineral Wool: Insulation created from melted rock or slag, formed into fibers.
Modified Bitumen Roof Covering: Layers of polymer-modified asphalt adhered or held in place for roofing.
Mortar: Mixture of cement, aggregates, and water used in masonry construction.
Mortar, Surface-Bonding: Mixture of hydraulic cement and glass fibers for bonding masonry.
Multilevel Assembly Seating: Seating arranged in different levels with multiple rows.
Multiple-Station Alarm Device: Interconnected alarm devices initiating universal alerts.
Multiple-Station Smoke Alarm: Smoke alarms capable of interconnection for synchronized activation.
Multistory Unit: Housing units spanning multiple stories.
Nailable Substrate: Wood-based materials providing reliable fastener withdrawal resistance.
Nailing, Boundary: Specialized nailing pattern at diaphragm boundaries.
Nailing, Edge: Nailing pattern at the edges of panels within assemblies.
Nailing, Field: General nailing between panels and framing members.
Naturally Durable Wood: Wood species resistant to decay based on heartwood composition.
Decay resistant wood: Includes Redwood, Cedar, Black Locust, and Black Walnut.
Termite resistant wood: Includes Redwood and various Cedar species.
Nominal Loads: Specified load magnitudes for environmental conditions.
Nominal Size (Lumber): Commercially specified dimensions of lumber.
Noncombustible Membrane Structure: A structure where all components are nonflammable.
Noncombustible Protection (for Mass Timber): Materials enhancing fire resistance in mass timber.
Nonstructural Concrete: Concrete elements not part of the primary structural load system.

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Description

This quiz features flashcards from Chapter 2 of the IBC 2021, focusing on key definitions from L to N. Each card includes essential terminology relevant to fire safety and construction standards. Test your knowledge of important terms and their meanings.