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Home Improvement and DIY Retail Industry Acronyms

Home Improvement and DIY Retail Industry Acronyms

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This glossary covers operational, merchandising, building-product, safety, regulatory, and supply-chain acronyms used in the Home Improvement and DIY Retail Practice within Consumer & Retail. It helps executives, operators, merchants, suppliers, and advisers interpret terminology used across stores, pro sales, installed services, and product compliance.

A B C D E F G H I K L M N O P R S T U V W X

A
ABS Acrylonitrile Butadiene Styrene:
A rigid thermoplastic used in drain, waste, and vent pipe, fittings, tool housings, and other durable products sold through home-improvement channels.
ADA Americans with Disabilities Act:
A federal civil-rights law that affects store accessibility, customer facilities, parking, checkout design, and the specifications of certain accessibility-oriented building products.
AFCI Arc-Fault Circuit Interrupter:
A protective device that detects hazardous electrical arcing and disconnects a circuit, with installation requirements established by applicable electrical codes.
AFUE Annual Fuel Utilization Efficiency:
A percentage rating indicating how efficiently a furnace or boiler converts fuel into usable heat over a typical year.
AHJ Authority Having Jurisdiction:
The agency or official responsible for interpreting and enforcing building, electrical, plumbing, fire, or mechanical requirements in a particular location.
AHRI Air-Conditioning, Heating, and Refrigeration Institute:
An industry association whose certification programs verify the rated performance of heating, cooling, water-heating, and refrigeration equipment.
ALSC American Lumber Standard Committee:
The body that administers the American softwood-lumber standard and accredits grading and treated-lumber inspection agencies.
ANSI American National Standards Institute:
The organization that coordinates voluntary consensus standards affecting tools, ladders, protective equipment, building products, and many other retail categories.
APA American Plywood Association:
The organization now known as The Engineered Wood Association provides standards, certification, and grade marks for structural plywood, oriented strand board, and engineered wood products.
ASSE American Society of Sanitary Engineering:
The organization now operating as ASSE International develops and certifies standards for backflow preventers, plumbing safety devices, and related products.
ASTM American Society for Testing and Materials:
The organization now known as ASTM International publishes widely referenced test methods and specifications for building materials, coatings, flooring, tools, and consumer products.
AWG American Wire Gauge:
The standard system used to identify electrical-wire diameter; lower gauge numbers generally indicate thicker conductors with greater current-carrying capacity.
AWPA American Wood Protection Association:
A standards organization that defines preservatives, treatment processes, and use categories for pressure-treated wood.
B
B&M Brick-and-Mortar:
A physical retail location, distinguished from a purely digital channel but commonly integrated with online ordering, pickup, returns, and local delivery.
BF Board Foot:
A lumber-volume unit equal to a board measuring one foot by one foot by one inch, used in pricing and inventorying hardwood and specialty lumber.
BIY Buy It Yourself:
A project model in which the customer purchases materials or fixtures directly but hires a professional to complete the installation.
BOH Back of House:
Non-customer-facing store areas used for receiving, storage, staging, administration, and employee operations.
BOH Balance on Hand:
The inventory quantity that a retail system records as currently available at a store, distribution center, or fulfillment location.
BOL Bill of Lading:
A transportation document describing a shipment, its origin and destination, and the carrier’s receipt of the goods.
BOPAC Buy Online, Pick Up at Curbside:
An omnichannel service in which store employees assemble an online order and transfer it to the customer outside the store.
BOPIS Buy Online, Pick Up in Store:
A fulfillment option that uses local store inventory to satisfy an online order for customer collection.
BORIS Buy Online, Return in Store:
A returns capability that allows merchandise purchased digitally to be processed at a physical retail location.
BOSS Buy Online, Ship to Store:
A fulfillment method that routes an online order from a distribution or supplier location to a store for customer pickup.
BPM Blows per Minute:
A performance measure for hammer drills, rotary hammers, and impact tools indicating the frequency of striking action.
Btu British Thermal Unit:
A unit of heat used to state the heating or cooling capacity of furnaces, air conditioners, grills, fireplaces, and water heaters.
BUR Built-Up Roofing:
A low-slope roofing system constructed from alternating layers of bitumen and reinforcing material, usually finished with aggregate or a protective coating.
C
CARB California Air Resources Board:
A state regulator whose rules influence formaldehyde emissions from composite wood and emissions from coatings, equipment, and other products sold nationally.
CCA Chromated Copper Arsenate:
A wood preservative historically used for treated lumber and still permitted for certain industrial and agricultural applications, but restricted from most residential uses.
CCT Correlated Color Temperature:
A lighting specification, measured in kelvins, that describes whether emitted light appears warm, neutral, or cool.
CFM Cubic Feet per Minute:
An airflow measure used to rate ventilation fans, air compressors, dust collectors, blowers, and heating and cooling equipment.
CFL Compact Fluorescent Lamp:
An energy-efficient fluorescent light source that has largely been displaced by light-emitting-diode products but remains relevant to replacement and disposal programs.
CMU Concrete Masonry Unit:
A precast concrete block used for foundations, walls, landscaping, and other structural or decorative masonry applications.
CoC Chain of Custody:
A documented system that tracks certified wood or other materials through processing, distribution, and sale to support sourcing claims.
COP Coefficient of Performance:
A ratio comparing useful heating or cooling output with energy input, used to evaluate heat pumps and related equipment.
CPVC Chlorinated Polyvinyl Chloride:
A thermoplastic piping material formulated to withstand higher temperatures than standard vinyl pipe, commonly used for potable hot- and cold-water systems.
CRI Color Rendering Index:
A scale indicating how accurately a light source reveals colors compared with a reference source.
CRRC Cool Roof Rating Council:
An independent body that rates roofing products for solar reflectance and thermal emittance, supporting energy-code and cool-roof compliance.
CSA Canadian Standards Association:
The legacy name behind a certification system used to demonstrate that electrical, gas-fired, plumbing, and other products meet applicable Canadian or North American requirements.
CPSC Consumer Product Safety Commission:
The U.S. federal agency responsible for consumer-product safety rules, recalls, injury reporting, and enforcement across many home and hardware categories.
D
DC Distribution Center:
A facility that receives, stores, consolidates, and ships merchandise to stores, fulfillment locations, job sites, or customers.
DCOF Dynamic Coefficient of Friction:
A laboratory measure used to assess the slip resistance of hard-surface flooring, particularly ceramic and porcelain tile under wet conditions.
DIFM Do It for Me:
A customer segment that purchases a completed project or installation service rather than performing the work independently.
DIY Do It Yourself:
A customer and project model in which the purchaser performs the repair, improvement, installation, or maintenance work without hiring a professional.
DLC DesignLights Consortium:
An organization that maintains qualified-product lists for energy-efficient commercial lighting, often used to determine utility-rebate eligibility.
DOE Department of Energy:
The U.S. federal department that sets energy-conservation standards and test procedures for lighting, heating, cooling, water-heating, and appliance products.
DP Design Pressure:
A window, door, or building-envelope rating indicating resistance to specified wind and pressure loads.
DSD Direct Store Delivery:
A replenishment method in which a supplier delivers merchandise directly to individual stores rather than through the retailer’s distribution network.
DWV Drain, Waste, and Vent:
The non-pressurized portion of a plumbing system that removes wastewater and admits air to maintain proper drainage.
E
EAS Electronic Article Surveillance:
Tags, labels, antennas, and alarms used to deter and detect merchandise theft, particularly for high-value tools and hardware.
EDI Electronic Data Interchange:
The structured computer-to-computer exchange of purchase orders, invoices, shipment notices, and other trading documents between retailers and suppliers.
EER2 Energy Efficiency Ratio 2:
A current efficiency metric for certain residential air-conditioning and heat-pump equipment under updated federal testing procedures.
EIFS Exterior Insulation and Finish System:
A multilayer exterior wall-cladding system combining insulation board, reinforced base coat, and a textured finish coat.
EIR Embossed in Register:
A flooring and decorative-surface manufacturing technique that aligns texture with the printed wood or stone pattern for a more realistic appearance.
EPA Environmental Protection Agency:
The U.S. federal agency that regulates pesticides, lead-safe renovation, chemicals, emissions, and environmental claims affecting numerous home-improvement products and services.
EPD Environmental Product Declaration:
A standardized, independently verified document reporting a product’s life-cycle environmental impacts for specification, procurement, and green-building decisions.
EPDM Ethylene Propylene Diene Monomer:
A durable synthetic rubber used in low-slope roofing membranes, weather seals, hoses, pond liners, and related products.
EPR Extended Producer Responsibility:
A regulatory approach requiring producers to fund or manage collection, recycling, or disposal programs for products such as paint, batteries, packaging, and electronics.
EPS Expanded Polystyrene:
A lightweight rigid foam used in insulation, packaging, concrete forms, and other construction applications.
ETL Electrical Testing Laboratories:
The legacy name behind an Intertek product-certification mark showing that electrical or other equipment has been tested to applicable safety standards.
EVSE Electric Vehicle Supply Equipment:
Equipment that safely delivers electrical power to charge an electric vehicle, including residential wall-mounted and portable charging products.
F
FAS Firsts and Seconds:
A high hardwood-lumber grade defined by the National Hardwood Lumber Association and used when large clear cuttings are required.
FGIA Fenestration and Glazing Industry Alliance:
An industry organization that develops performance standards, certification programs, and technical guidance for windows, doors, skylights, and glazing systems.
FIFRA Federal Insecticide, Fungicide, and Rodenticide Act:
The principal U.S. law governing registration, labeling, sale, distribution, and use of pesticides, including lawn, garden, and pest-control products.
FIP Female Iron Pipe:
A plumbing connection with internal tapered threads designed to receive a corresponding externally threaded pipe or fitting.
FRT Fire-Retardant-Treated:
Describes wood or another material treated to reduce flame spread and meet specified fire-performance requirements.
FSC Forest Stewardship Council:
An international certification system supporting responsible forest management and traceable sourcing of wood, paper, flooring, and related products.
G
GFCI Ground-Fault Circuit Interrupter:
A protective device that quickly disconnects electrical power when it detects leakage current, reducing shock risk in wet or exposed locations.
GHS Globally Harmonized System of Classification and Labelling of Chemicals:
An international framework for hazard classes, pictograms, signal words, labels, and safety data used for workplace chemicals and consumer-product handling.
GMROI Gross Margin Return on Investment:
A retail productivity measure comparing gross-margin dollars with average inventory cost to assess how effectively merchandise investment generates profit.
GPM Gallons per Minute:
A flow-rate measure used for faucets, showerheads, pumps, pressure washers, irrigation products, and other water-handling equipment.
GTIN Global Trade Item Number:
A standardized product identifier used in barcodes, retail item files, ordering, receiving, inventory management, and electronic commerce.
GWP Global Warming Potential:
A measure comparing a greenhouse gas’s heat-trapping effect with carbon dioxide, important for refrigerants, foam insulation, and environmental product reporting.
H
HDF High-Density Fiberboard:
An engineered wood panel with greater density than medium-density fiberboard, commonly used in flooring cores, doors, cabinetry, and moulding.
HEPA High-Efficiency Particulate Air:
A filter classification associated with capturing at least 99.97 percent of particles measuring 0.3 micrometers under specified test conditions.
HFC Hydrofluorocarbon:
A class of refrigerants used in cooling equipment and subject to phasedown requirements because many formulations have high global-warming potential.
HFO Hydrofluoroolefin:
A class of refrigerants and foam-blowing agents developed to provide lower global-warming impact than many hydrofluorocarbons.
HIC Home Improvement Contractor:
A business or individual that performs residential remodeling, repair, or installation work and may be subject to state or local licensing and contract rules.
HIRI Home Improvement Research Institute:
An industry research organization that provides market data and consumer insights on home-improvement products, projects, and purchasing behavior.
HMIS Hazardous Materials Identification System:
A workplace labeling system that communicates health, flammability, physical-hazard, and personal-protection information for chemical products.
HPD Health Product Declaration:
A standardized disclosure of building-product ingredients and associated health information used by architects, contractors, and sustainability programs.
HPL High-Pressure Laminate:
A durable decorative sheet material manufactured under heat and pressure for countertops, cabinetry, wall panels, and furniture surfaces.
HSPF2 Heating Seasonal Performance Factor 2:
A current seasonal-efficiency rating for the heating performance of residential heat pumps under updated federal test procedures.
HVAC Heating, Ventilation, and Air Conditioning:
The systems and product category used to control indoor temperature, humidity, ventilation, and air quality.
I
IBC International Building Code:
A model code for commercial and multifamily construction that influences required product ratings, installation methods, and local code compliance.
ICC International Code Council:
The organization that develops model building, residential, fire, plumbing, mechanical, and energy codes widely adopted by U.S. jurisdictions.
ICC-ES International Code Council Evaluation Service:
An evaluation body that assesses whether innovative building products and systems comply with applicable model codes.
IECC International Energy Conservation Code:
A model code establishing energy-efficiency requirements for building envelopes, insulation, windows, lighting, and mechanical systems.
IGU Insulating Glass Unit:
A sealed assembly of two or more glass panes separated by a spacer and air or insulating gas to improve window thermal performance.
IIC Impact Insulation Class:
A laboratory rating of how effectively a floor-ceiling assembly reduces impact noise, relevant to flooring and underlayment selection.
IP Ingress Protection:
A two-digit enclosure rating indicating protection against contact, solid particles, and water intrusion for lighting, tools, and electrical equipment.
IPC International Plumbing Code:
A model code establishing minimum requirements for plumbing-system design, materials, fixtures, installation, and inspection.
IPM Integrated Pest Management:
A pest-control approach combining monitoring, prevention, physical controls, biological methods, and targeted pesticide use.
ISPM 15 International Standard for Phytosanitary Measures No. 15:
A global standard requiring approved treatment and marking of solid-wood packaging to reduce the international spread of pests.
K
KD Kiln-Dried:
Describes lumber dried in a controlled kiln to a specified moisture-content range for improved dimensional stability and usability.
KDAT Kiln-Dried After Treatment:
Describes pressure-treated lumber dried after preservative treatment to reduce moisture content, weight, shrinkage, and warping.
KCMA Kitchen Cabinet Manufacturers Association:
An industry association whose certification program tests cabinetry for structural strength, durability, and finish performance.
KVI Key Value Item:
A highly visible or frequently compared product whose price strongly shapes customer perceptions of a retailer’s overall value.
L
LBM Lumber and Building Materials:
A major merchandise and distribution segment encompassing lumber, panels, roofing, insulation, masonry, drywall, and other construction products.
LED Light-Emitting Diode:
A semiconductor light source used in bulbs, fixtures, work lights, landscape lighting, and connected lighting systems.
LEED Leadership in Energy and Environmental Design:
A green-building rating system that can influence demand for efficient, low-emitting, responsibly sourced, and environmentally disclosed products.
LPG Liquefied Petroleum Gas:
A fuel, commonly propane, sold or exchanged for grills, patio heaters, generators, forklifts, and other equipment.
LRV Light Reflectance Value:
A percentage indicating how much visible light a paint color or surface reflects, affecting appearance, contrast, and accessibility planning.
LSL Laminated Strand Lumber:
An engineered structural wood product made from bonded wood strands and used for studs, headers, rim boards, and framing components.
LTL Less Than Truckload:
Freight transportation in which shipments from multiple customers share trailer capacity, often used for palletized building products and store replenishment.
LVL Laminated Veneer Lumber:
An engineered wood product made from bonded veneer layers and used for beams, headers, rim boards, and other structural applications.
LVP Luxury Vinyl Plank:
Resilient flooring manufactured in plank form to replicate wood, stone, or other decorative surfaces.
LVT Luxury Vinyl Tile:
Resilient modular flooring designed to reproduce the appearance of ceramic tile, stone, wood, or other materials.
M
MAP Minimum Advertised Price:
A supplier policy setting the lowest price at which a retailer may advertise a product, without necessarily determining the final selling price.
MaP Maximum Performance:
A standardized toilet-testing program that reports waste-removal performance to help merchants and customers compare fixture capability.
MBF Thousand Board Feet:
A lumber-volume unit used in wholesale purchasing, commodity pricing, inventory planning, and sales reporting.
MDF Medium-Density Fiberboard:
An engineered panel made from wood fibers and resin, widely used in cabinetry, shelving, doors, moulding, and furniture components.
MERV Minimum Efficiency Reporting Value:
A rating that indicates an air filter’s ability to capture particles across defined size ranges.
MIP Male Iron Pipe:
A plumbing connection with external tapered threads designed to fit a corresponding internally threaded fitting.
MPI Master Painters Institute:
An organization that publishes architectural-paint standards, approved-product lists, and performance specifications used in professional coating selection.
MRO Maintenance, Repair, and Operations:
Products and supplies used to maintain facilities, equipment, and properties rather than becoming part of a newly manufactured finished good.
MSDS Material Safety Data Sheet:
The former U.S. term for a document describing chemical hazards, handling, storage, and emergency measures, now generally replaced by the standardized safety data sheet.
MSF Thousand Square Feet:
A quantity and pricing unit used for sheet goods, siding, roofing, flooring, insulation, and other area-based building products.
N
NAF No-Added Formaldehyde:
A designation for composite-wood products manufactured without formaldehyde-based resins, subject to applicable qualification and labeling requirements.
NAHB National Association of Home Builders:
A U.S. trade association representing builders, remodelers, and related businesses whose activity drives professional demand for construction products.
NALFA North American Laminate Flooring Association:
An industry organization that supports performance standards, testing, certification, and education for laminate flooring.
NARI National Association of the Remodeling Industry:
A U.S. professional association for remodeling contractors and related companies, providing education, certification, and industry standards.
NEC National Electrical Code:
The widely adopted U.S. benchmark for safe electrical design and installation, formally published as National Fire Protection Association Standard 70.
NELMA Northeastern Lumber Manufacturers Association:
An accredited rules-writing and inspection agency responsible for grading standards and certification of certain northeastern softwood species.
NEMA National Electrical Manufacturers Association:
An organization that develops standards for electrical products, including enclosure types, plugs, receptacles, motors, and other equipment.
NFPA National Fire Protection Association:
A standards organization whose codes address electrical safety, fire prevention, flammable materials, sprinklers, alarms, and life safety.
NFRC National Fenestration Rating Council:
An independent organization that certifies standardized energy-performance ratings for windows, doors, and skylights.
NHPA North American Hardware and Paint Association:
A trade organization providing education, research, and operational resources for independent hardware, paint, and home-improvement retailers.
NKBA National Kitchen & Bath Association:
A professional association that develops planning guidelines, education, and certifications for kitchen and bathroom design and remodeling.
NLBMDA National Lumber and Building Material Dealers Association:
A U.S. trade association representing lumberyards, building-material dealers, and their suppliers on policy, regulatory, and operating issues.
NM-B Nonmetallic-Sheathed Cable, Type B:
A common residential branch-circuit cable intended for normally dry locations and installed according to electrical-code requirements.
NPK Nitrogen, Phosphorus, and Potassium:
The three primary plant nutrients stated as a three-number fertilizer analysis on lawn and garden products.
NPT National Pipe Taper:
A U.S. standard for tapered pipe threads that create a pressure-tight connection when properly assembled and sealed.
NRTL Nationally Recognized Testing Laboratory:
An organization recognized by the Occupational Safety and Health Administration to test and certify products against applicable safety standards.
NSF National Sanitation Foundation:
The legacy name behind an independent organization that tests and certifies water-treatment, plumbing, food-equipment, and other public-health products.
NWFA National Wood Flooring Association:
An industry association that publishes installation, sanding, finishing, maintenance, and technical standards for wood flooring.
O
OOS Out of Stock:
A condition in which customer demand cannot be met because no sellable inventory is available at the relevant location or channel.
OPE Outdoor Power Equipment:
Powered lawn, garden, forestry, and property-maintenance products such as mowers, trimmers, blowers, chainsaws, and snow throwers.
OPEI Outdoor Power Equipment Institute:
A trade association representing manufacturers of outdoor power products, utility vehicles, engines, and related equipment.
OSA On-Shelf Availability:
The percentage of time a product is physically available for customers to purchase in its assigned selling location.
OSB Oriented Strand Board:
An engineered structural panel made from aligned wood strands and adhesive, widely used in sheathing, subflooring, and roofing.
OSHA Occupational Safety and Health Administration:
The U.S. federal agency that establishes and enforces workplace-safety requirements affecting stores, warehouses, lumberyards, delivery operations, and installation crews.
OTB Open to Buy:
A merchandising budget showing how much inventory can be ordered during a period while remaining within planned sales, stock, and markdown targets.
OTIF On Time in Full:
A supplier-performance measure tracking whether orders arrive by the required date with the complete quantity requested.
P
PEFC Programme for the Endorsement of Forest Certification:
An international umbrella system that recognizes national forest-certification programs and supports traceable, responsibly sourced wood products.
PEI Porcelain Enamel Institute:
The name associated with a commonly used tile abrasion classification that helps match glazed tile to expected traffic and wear.
PEX Cross-Linked Polyethylene:
Flexible plastic tubing used in potable-water distribution, radiant heating, and other plumbing applications.
PFAS Per- and Polyfluoroalkyl Substances:
A large group of persistent chemicals facing expanding restrictions and disclosure requirements in coatings, textiles, sealants, cookware, and other products.
PIR Passive Infrared:
A sensor technology that detects changes in infrared radiation and is widely used in occupancy sensors, security devices, and automatic lighting controls.
PIR Polyisocyanurate:
A rigid closed-cell foam insulation used in wall, roof, and sheathing applications because of its relatively high thermal resistance per unit thickness.
POG Planogram:
A diagram specifying where products, displays, labels, and fixtures should be placed to execute an assortment consistently across stores.
PPE Personal Protective Equipment:
Protective items such as safety glasses, gloves, respirators, hearing protection, hard hats, and protective footwear used to reduce workplace and project hazards.
PSI Pounds per Square Inch:
A pressure or strength unit used for compressors, pressure washers, plumbing systems, pneumatic tools, concrete, and other products.
PSL Parallel Strand Lumber:
A high-strength engineered wood product made from bonded parallel wood strands and used for beams, headers, and columns.
PT Pressure-Treated:
Describes wood impregnated with preservatives under pressure to improve resistance to decay, fungi, and termites for specified exposure conditions.
PTFE Polytetrafluoroethylene:
A low-friction fluoropolymer used in thread-seal tape, gaskets, valve components, coatings, and chemical-resistant products.
PV Photovoltaic:
Describes technology that converts sunlight directly into electricity, including solar modules and associated residential energy products.
PVA Polyvinyl Acetate:
A polymer used in wood glue, primers, paints, sealers, and other water-based adhesive or coating products.
PVC Polyvinyl Chloride:
A widely used thermoplastic found in pipe, conduit, siding, trim, flooring, roofing membranes, and numerous building components.
R
RDC Regional Distribution Center:
A geographically positioned warehouse that supplies stores or fulfillment points within a defined market area.
REACH Registration, Evaluation, Authorisation and Restriction of Chemicals:
The European Union chemicals framework that affects product composition, supplier documentation, restricted substances, and global sourcing decisions.
RFCI Resilient Floor Covering Institute:
A trade organization providing technical guidance, standards support, and sustainability resources for vinyl, rubber, and other resilient flooring.
RO Reverse Osmosis:
A water-treatment process that forces water through a semipermeable membrane to reduce dissolved salts and other contaminants.
RoHS Restriction of Hazardous Substances:
European requirements limiting specified hazardous materials in electrical and electronic equipment, with implications for globally sourced tools, lighting, and controls.
RPM Revolutions per Minute:
A rotational-speed measure used to compare drills, saws, grinders, routers, fans, and other powered equipment.
RRP Renovation, Repair and Painting:
A federal lead-safety rule covering firms and individuals who disturb painted surfaces in qualifying pre-1978 homes, schools, and child-care facilities.
RTA Ready to Assemble:
Describes cabinets, furniture, storage, and related products shipped flat-packed for assembly by the customer or installer.
RTV Return to Vendor:
A process for sending defective, damaged, recalled, obsolete, or excess merchandise back to a supplier for credit or disposition.
S
SCAQMD South Coast Air Quality Management District:
A California regulator whose stringent volatile-organic-compound limits for coatings, adhesives, sealants, and solvents often influence national product formulations.
SDS Safety Data Sheet:
A standardized document describing a chemical product’s hazards, composition, handling, storage, exposure controls, and emergency measures.
SEER2 Seasonal Energy Efficiency Ratio 2:
A current federal rating for the seasonal cooling efficiency of residential air conditioners and heat pumps under updated testing conditions.
SFI Sustainable Forestry Initiative:
A forest-certification and fiber-sourcing program used for lumber, paper, packaging, and other wood-based products.
SFS Ship from Store:
A fulfillment model that uses store inventory and labor to pick, pack, and dispatch customer orders.
SHGC Solar Heat Gain Coefficient:
A value from zero to one indicating how much solar heat passes through a window, door, or skylight assembly.
SKU Stock Keeping Unit:
A retailer-defined identifier for a distinct product, size, color, pack, or configuration used in assortment, inventory, pricing, and sales systems.
SPC Stone Plastic Composite:
A rigid-core resilient flooring construction combining mineral filler and polymer to provide dimensional stability and water resistance.
SPF Spray Polyurethane Foam:
A site-applied foam used for insulation and air sealing in walls, roofs, rim joists, and other building-envelope locations.
SPF Spruce-Pine-Fir:
A commercial softwood species group used for dimensional framing lumber and identified by standardized grade marks.
SPIB Southern Pine Inspection Bureau:
An accredited agency that publishes grading rules and provides inspection and certification services for Southern Pine lumber.
SRI Solar Reflectance Index:
A calculated measure combining solar reflectance and thermal emittance to indicate how hot a roofing or paving surface may become in sunlight.
STC Sound Transmission Class:
A laboratory rating of how effectively a wall, floor, door, or window assembly reduces airborne sound transmission.
SWPPP Stormwater Pollution Prevention Plan:
A site-specific plan describing controls that prevent pollutants from entering stormwater runoff, relevant to outdoor yards and construction activities.
SYP Southern Yellow Pine:
A strong group of southeastern U.S. softwood species widely used for framing, decking, pressure-treated lumber, and structural components.
T
TCNA Tile Council of North America:
An industry organization that develops technical guidance, product standards, and recognized installation methods for ceramic, porcelain, glass, and stone tile.
TDS Technical Data Sheet:
A manufacturer document describing product properties, coverage, preparation, application, curing, compatibility, limitations, and performance.
THHN Thermoplastic High Heat-Resistant Nylon-Coated:
A common building-wire insulation designation used for conductors installed in conduit and other approved raceways.
TPI Threads per Inch:
A measure of thread pitch used to specify fasteners, pipe connections, saw blades, and other threaded or toothed products.
TPO Thermoplastic Polyolefin:
A heat-weldable single-ply membrane used primarily for low-slope commercial and residential roofing systems.
TR Tamper-Resistant:
Describes electrical receptacles with internal shutters designed to reduce accidental insertion of foreign objects.
TSCA Toxic Substances Control Act:
The principal U.S. law governing industrial chemicals, including formaldehyde-emission requirements for composite-wood products.
TVOC Total Volatile Organic Compounds:
An aggregate measure of airborne volatile chemicals used in indoor-air-quality testing and product-emissions reporting.
U
UL Underwriters Laboratories:
The legacy name behind a major safety organization whose certification marks appear on electrical, lighting, tool, fire-safety, and building products.
ULEF Ultra-Low-Emitting Formaldehyde:
A regulatory designation for qualifying composite-wood products manufactured with resins that produce very low formaldehyde emissions.
UOM Unit of Measure:
The quantity basis on which merchandise is purchased, stocked, priced, or sold, such as each, case, pallet, linear foot, or square foot.
UPC Uniform Plumbing Code:
A model code governing plumbing systems and products that is adopted or adapted by numerous state and local jurisdictions.
UPC Universal Product Code:
A standardized retail barcode used to identify products at checkout and throughout ordering, receiving, inventory, and replenishment processes.
USGBC U.S. Green Building Council:
A nonprofit organization that administers a major green-building rating system and influences demand for documented sustainable building products.
V
VOC Volatile Organic Compound:
A carbon-containing chemical that readily evaporates and is regulated in paints, coatings, adhesives, sealants, solvents, and other products because of air-quality impacts.
VT Visible Transmittance:
A fenestration rating from zero to one indicating the fraction of visible light transmitted through a window, door, or skylight.
W
WCLIB West Coast Lumber Inspection Bureau:
An accredited agency that provides grading rules, inspection, and certification services for western lumber products.
WDMA Window & Door Manufacturers Association:
A trade association that develops standards, certification programs, and technical guidance for windows, doors, and skylights.
WLL Working Load Limit:
The maximum load that lifting, towing, rigging, or securing hardware is rated to handle under specified normal-use conditions.
WOS Weeks of Supply:
An inventory measure estimating how many weeks current stock will last at the expected rate of sale.
WPC Wood-Plastic Composite:
A material combining wood fiber or flour with polymers, commonly used in decking, railing, trim, and rigid-core flooring.
WR Weather-Resistant:
Describes electrical receptacles and other products designed and tested to withstand environmental exposure when installed as specified.
WUI Wildland-Urban Interface:
An area where buildings meet or intermingle with wildland vegetation, often subject to special requirements for ignition-resistant roofing, siding, vents, decking, and landscaping.
WWPA Western Wood Products Association:
An accredited lumber-grading and inspection agency that publishes technical information for western softwood species and products.
X
XPS Extruded Polystyrene:
A closed-cell rigid foam insulation valued for moisture resistance and compressive strength in foundations, walls, roofs, and below-grade applications.