Multisplit system
Sistema multisplitAssembly where one outdoor unit supplies several separate indoor climate control units.
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Construction dictionary
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2,147 construction and renovation terms9 specialtiesEasy-to-understand definitions
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Building terms, clearly explained.
2,147 terms found
Multistage pump
Bomba multietapaA component of a water installation that helps to increase pressure through several impellers arranged in series.
n50
Air leakage change rate measured at fifty pascals, divided by the tested building’s internal volume.
Nail-laminated timber
Madera laminada clavadaPanel of boards placed on edge and connected with nails to act together.
Natural cleft finish
Lajado naturalFinish using natural splitting planes to obtain irregular textured stone surfaces.
Natural gas
Gas naturalGaseous fuel consisting mainly of methane and usually distributed through pipelines.
Natural hydraulic lime
Cal hidráulica naturalHydraulic lime produced by burning limestone containing natural clay or siliceous constituents.
Natural stone
Piedra naturalRock material extracted from deposits and processed for construction or decorative use.
Natural stone grain direction
Ley de la piedraNatural material orientation influencing cutting, splitting or the mechanical behaviour of stone.
Natural ventilation
Ventilación naturalAir renewal driven by wind or temperature differences without using mechanical fans.
Natural wood veneer
Chapa natural de maderaThin sheet obtained by slicing or peeling natural wood.
Negative skin friction
Rozamiento negativoDownward action on a pile when surrounding soil settles more than the pile.
Net measurement
Medición netaActual quantity obtained after applying agreed deductions.
Network switch
Switch de redEquipment connecting multiple devices within a local network and directing data between them.
Network video recorder
Grabador de vídeo en redEquipment receiving and storing video from cameras connected through a data network.
Neutral axis
Eje neutroLine in a cross-section under bending where longitudinal strain is zero.
Neutral conductor
NeutroConductor connected to the supply's neutral point and used for distributing electrical energy.
Neutral-cure silicone
Silicona neutraSilicone sealant with a neutral curing system, selected according to substrate compatibility.
Nominal pipe diameter
Diámetro nominal de tuberíaStandardized designation of pipe size rather than an exact measured dimension.
Non-accessible roof
Cubierta no transitableRoof primarily protecting a building, with access restricted to inspection and maintenance activities.
Notched trowel
Llana dentadaTrowel with a toothed edge distributing adhesive into ridges of controlled geometry.
Notching timber
Entallado de maderaMaking local cuts and recesses to fit another piece.
Numerical scale
Escala numéricaWritten proportional relationship between a drawn measurement and its actual size.
O-ring
Junta tóricaA component of a water installation that helps to seal connections using a flexible ring of circular cross-section.
Oedometer test
Ensayo edométricoLaboratory test measuring soil compression and consolidation while preventing lateral deformation.
Off-grid photovoltaic system
Sistema fotovoltaico aisladoSolar installation supplying its loads without relying on a normal electricity grid connection.
Oil-fired boiler
Caldera de gasóleoA component of a heating installation used to produce hot water by burning a liquid petroleum fuel.
One-coat render
Mortero monocapaExterior render mortar combining protective functions with a decorative surface finish.
Opaque enclosure
Cerramiento opacoPart of the building envelope that prevents direct vision through its constituent construction layers.
Open facade joint
Junta abierta de fachadaUnsealed gap between cladding units that may permit the entry of air or water.
Open-circuit voltage
Tensión de circuito abiertoVoltage measured at a generator's terminals when it supplies no current to a load.
Open-plan space
Local diáfanoSpace that lacks substantial internal partitions and allows flexible arrangement of uses.
Opening lintel
Dintel de huecoUpper horizontal element spanning an opening and supporting the materials positioned above it.
Opening sensor
Sensor de aperturaDevice reporting whether a door, window or another moving component is open or closed.
Opening surround
Recercado de huecoAssembly of components or finishes framing an opening and resolving its connection to the facade.
Operation and maintenance manual
Manual de uso y mantenimientoDocument recording the instructions for using, inspecting and maintaining the building.
Optical connector
Conector ópticoDetachable component aligning fibre ends to allow a light signal to pass between them.
Optical fibre
Fibra ópticaGlass or plastic filament transmitting information through light signals guided along its length.
Optical network terminal
Terminal de red ópticaEquipment terminating a fibre connection and providing interfaces usable by the customer's network.
Optical outlet
Roseta ópticaTermination box providing an accessible fibre connection inside a home or premises.
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Technical references consulted
Definitions written in plain language using technical reference documentation.
- Fundación MUSAAT · Zapata
- Fundación MUSAAT · Zuncho
- ANFAPA · SATE
- CTE: Documento Básico SE-C Cimientos
- CTE: Documento Básico SE-A Acero
- CTE: Documento Básico SE-F Fábrica
- CTE: Documento Básico SE-M Madera
- European Commission JRC: Eurocode 7 geotechnical design examples
- WoodWorks: What is mass timber?
- Steel Construction Institute / BCSA: Member design
- American Concrete Institute: Self-consolidating concrete
- American Shotcrete Association: About shotcrete
- American Cement Association: types of cement
- NRMCA: Concrete in Practice technical topics
- FHWA: Alkali-silica reaction mechanisms
- American Concrete Institute: Chlorides and reinforcement corrosion
- Concrete Society: Carbonation of concrete
- American Concrete Institute: Guide to estimating prestress losses
- European Commission JRC: Major concepts of the EN Eurocodes
- CTE: Documento Básico SE Seguridad estructural
- CTE: Documento Básico SE-AE Acciones en la edificación
- Steel Construction Institute / BCSA: Composite construction
- Steel Construction Institute / BCSA: Welding
- Steel Construction Institute / BCSA: Steel construction products
- Steel Construction Institute / BCSA: Simple connections
- USDA Forest Products Laboratory: Wood handbook
- USDA Forest Products Laboratory: Wood composite materials
- WoodWorks: Index of mass timber connections
- Structural Timber Association: Timber systems
- Hispalyt: ejecución of fábricas of ladrillo, colocación
- American Cement Association: applications of cement
- ITeC: evaluación técnica of mortero of cal para revoco
- USG: joint compound technical data
- Sika: backer rod and sealant joint geometry
- Natural Stone Institute: varieties of stone
- Natural Stone Institute: technical bulletins
- Tikkurila: common painting problems
- Bona: recoating wood floors
- Placo: soluciones of yesos of terminación
- Kreidezeit: Tadelakt technical information
- Mapei: adhesive classification and selection
- Forbo: linoleum raw materials
- CTE DB-HS: Salubridad
- CTE DA DB-HE/1: Parámetros of la envolvente
- CTE DA DB-HE/2: Condensaciones
- CTE DA DB-HE/3: Puentes térmicos
- CTE DB-HR: Protección frente al ruido
- SOPREMA: Blue roofs and stormwater
- Building Science Corporation: Understanding Air Barriers
- Sika: Single-ply roof membranes
- SOPREMA: Tecnologías of impermeabilización
- Aliaxis: Akasison siphonic roof drainage systems
- ITeC: Evaluaciones DAU of sistemas of fachada
- CSTB: Laboratoire façades
- EOTA EAD 040083-01-0404: External thermal insulation composite systems with rendering system
- US Department of Energy: Guide to cool roofs
- Passive House Institute: Airtightness measurements
- Passive House Institute: Grundlagenwissen Luftdichtheit
- pro clima: Humidity-variable vapour control
- US EPA: Types of green infrastructure
- Saint-Gobain Glass: Acoustic laminated glass
- Saint-Gobain Glass: Solar control and low-emissivity coatings
- Saint-Gobain Glass: Glazing cavities and warm-edge spacers
- IDAE — La bomba of calor en la rehabilitación energética of edificios
- IDAE — Instalaciones of climatización con equipos autónomos
- IDAE — Instalaciones of climatización por agua
- IDAE — Sistemas of intercambio geotérmico of circuito cerrado
- U.S. Department of Energy — Whole-House Ventilation
- U.S. Department of Energy — Heat Pump Water Heaters
- U.S. EPA — Types of Septic Systems
- U.S. EPA — Point-of-Use Reverse Osmosis Systems
- U.S. EPA — Home Water Treatment Guide
- U.S. EPA — HEPA Filters
- Caleffi — Separation in Hydronic Systems
- Caleffi — Hydraulic Separators
- Grundfos — Non-return Valve
- Honeywell — SV2 Safety Shut-off Valves
- CDC — Legionella Control
- CDC — Carbon Monoxide Basics
- Schneider Electric — Electrical Installation Guide: Earthing schemes
- IET — Residual current devices
- Schneider Electric — Arc fault detection devices
- U.S. Department of Energy — Solar Photovoltaic Technology Basics
- Cisco — What is Power over Ethernet?
- INSST — Fichas of selección y uso of EPI
- INSST — Equipos of trabajo y máquinas: Listado of NTP
- Siemens — Aspirating smoke detectors
- DALI Alliance — Introducing DALI
- Schneider Electric — Types of RCDs
- KNX Association — What is KNX?
- U.S. Department of Energy — Solar Integration: Inverters and Grid Services Basics
- CharIN — Technical Details CCS (Basic)
- Televés — PAUs (Cajas), distribución of telefonía
- Fluke Networks — What parameters are tested with the CableIQ?
- Tyco Fire — Solenoid valves for deluge and preaction systems
- Autodesk: architectural drawings
- RICS: New Rules of Measurement
- National Park Service: Preservation Briefs
- HSE: demolition
- ASSA ABLOY: door controls
- EGGER: wood-based boards
- Pilkington: solar control glass
- Festool: circular saws for carpentry
- Pilkington: float glass manufacturing
- Pilkington: toughened and heat-strengthened glass
- Autodesk: clash detection setup
- Autodesk: common data environment
- Bohle: suction lifters for glass
- ISO: air permeability test method
- Barcelona City Council: building works authorisation
- ChovA: roof drain outlets