UB Universal Beam - Hot Rolled Structural Steel Section | British Standard UB da British Steel - componente eletrônico
British Steel

UB Universal Beam - Hot Rolled Structural Steel Section | British Standard

N.º da peça: UB ✓ Ativo
Em estoque Enviado em 1 a 3 dias úteis
A partir de $365 USD / unidade
MOQ: 1 |
Preço atualizado: 2026-10-09
Preços por volume
Qtd. Preço unitário Total
1 $480 $480,00
10 $460 $4.600,00
50 $430 $21.500,00
200 $395 $79.000,00
1.000 $365 $365.000,00
ℹ️ Todos os preços estão em USD
Ver datasheet (PDF) Ver alternativas

UB Visão geral

UB (Universal Beam) is a hot-rolled I-shaped structural steel section manufactured to British Standard dimensions, widely used as the load-bearing skeleton of steel-framed buildings, bridges, and industrial structures across the UK, the Middle East, and Commonwealth markets. A typical UB is designated by its serial size in millimetres followed by its mass per metre in kilograms (for example, UB 457 x 152 x 60 = 457 mm deep x 152 mm wide flange x 60 kg/m). The UB range spans light sections such as UB 127 x 76 x 13 up to heavy sections like UB 1016 x 305 x 487, with parallel inner and outer flange surfaces that simplify bolted end-plate and bearing-plate connections.

A Universal Beam is a category of hot-rolled structural steel section whose cross-section forms the capital letter I - a tall vertical web flanked by two horizontal flanges. Within the British Standards family it sits alongside the Universal Column (UC), which has a near-square flange and is optimised for axial compression; the UB, in contrast, is optimised for bending about its strong axis. In the structural steel taxonomy, UBs fall under the parent category of hot-rolled sections, then I-sections, then beams, then long products used in construction. British Steel is the only UK manufacturer of UB sections and produces them under BES 6001 certification with CE and UKCA marking.

Key features of UB sections include parallel flanges for simpler connection detailing, a wide size range covering spans from approximately 1 m to over 30 m, and availability in multiple steel grades: S235JR, S275JR/J0/J2 and S355JR/J0/J2 to EN 10025-2:2004, plus equivalent ASTM A36, A572 Gr 50 and A992 Gr 50 grades for export markets. Lengths are typically supplied 6 m to 18 m as standard, with project-specific cutting and cambering available from service centres.

Technically, UB sections are rolled from continuously-cast billets through a sequence of breakdown, intermediate, and finishing stands that progressively shape the I profile. The parallel-flange geometry - distinct from the older tapered-flange RSJ - allows moment-resisting connections to use flush end-plates without major cope-cutting. Mass-per-metre values, section depths, flange widths, web and flange thicknesses, root radii, and second-moment-of-area values are tabulated in the British Steel Universal Beams datasheet.

Typical applications of UB sections include primary beams in multi-storey commercial buildings, rafters in portal-framed warehouses, crane girders in industrial facilities, bridge girders for short- to medium-span highway and rail crossings, and mezzanine floor joists. The choice between UB, UC, IPE, HEA and HEB depends on regional design code (BS 5950 / Eurocode 3 / AISC), loading type (predominantly bending vs axial) and connection detailing preferences.

When specifying a UB, the designer should confirm grade, length, tolerance class (EN 10034), and any supplementary requirements such as CE marking, third-party inspection, or impact testing at sub-zero temperatures. For seismic or fatigue-sensitive applications, through-thickness property guarantees (Z15/Z25/Z35 to EN 10164) should be considered.

This page synthesises British Steel datasheet values, regional equivalent mapping (UB vs IPE vs W-shape), and practical specification guidance not consolidated in a single manufacturer document.

Alternativas drop-in para UB — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.

Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:

UB 127x76x13

✅ Drop-In ⚠️ Especificações não verificadas
📦 Hot-rolled I-section, 127 mm depth
smallest standard UB serial size, 13 kg/m, same BS 4-1 geometry

📋 Alternativa de referência (fora do catálogo)

UB 203x133x25

✅ Drop-In ⚠️ Especificações não verificadas
📦 Hot-rolled I-section, 203 mm depth
light UB size, 25 kg/m, same parallel-flange I-section profile

📋 Alternativa de referência (fora do catálogo)

UB 254x146x31

✅ Drop-In ⚠️ Especificações não verificadas
📦 Hot-rolled I-section, 254 mm depth
popular medium-light UB, 31 kg/m, same BS 4-1 family

📋 Alternativa de referência (fora do catálogo)

UB 305x165x40

✅ Drop-In
📦 Hot-rolled I-section, 305 mm depth
common medium UB, 40 kg/m, near-equivalent to IPE 300

📋 Alternativa de referência (fora do catálogo)

UB 457x152x60

✅ Drop-In
📦 Hot-rolled I-section, 457 mm depth
benchmark medium-heavy UB, 60 kg/m, widely used in UK commercial frames

📋 Alternativa de referência (fora do catálogo)

UB 533x210x82

✅ Drop-In
📦 Hot-rolled I-section, 533 mm depth
heavy UB, 82 kg/m, same parallel-flange geometry, larger size

📋 Alternativa de referência (fora do catálogo)

UB 610x229x101

✅ Drop-In
📦 Hot-rolled I-section, 610 mm depth
heavy UB, 101 kg/m, primary beam size for commercial buildings

📋 Alternativa de referência (fora do catálogo)

UB Especificações

Section Type Universal Beam (UB)
Manufacturing Process Hot rolled
Cross-Section Shape I-section (parallel flanges)
Design Standard BS 4-1 / EN 10034
Steel Grades (EN 10025-2:2004) S235JR, S275JR/J0/J2, S355JR/J0/J2
Equivalent ASTM Grades A36, A572 Gr 50, A992 Gr 50
Serial Size Range (Depth) 127 mm to 1016 mm
Flange Width Range 76 mm to 305 mm
Mass Per Metre Range 13 kg/m to 487 kg/m
Standard Length Range 6 m to 18 m
Flange Geometry Parallel inner and outer flange surfaces
Dimensional Tolerance EN 10034
Certification BES 6001, CE and UKCA marked
Surface Condition As-rolled (mill scale)
Through-Thickness Option Z15 / Z25 / Z35 to EN 10164 (on request)
Typical Applications Beams, rafters, bridge girders, crane girders

Guia de Configuração de Pinos do UB standard

Configuração de pinos para UB (pacote standard). A numeração dos pinos, funções e diagramas de conexão estão definidos no datasheet do fabricante. Consulte-o para o footprint exato e diretrizes de soldagem.

Diagrama de pinagem do pacote standard para UB

Nenhum dado detalhado de pinagem disponível para UB.

Consulte a ficha técnica para a configuração completa dos pinos.

Aplicações típicas

UB é adequado para 6 aplicaçãos: Multi-Storey Commercial Building Frames, Portal-Framed Warehouse Rafters, Crane Girder Beams, Short to Medium-Span Highway Bridge Girders, Mezzanine Floor Joists, Roof Purlins and Side Rails (with Stubs).

🏭

Multi-Storey Commercial Building Frames

UB sections form the primary beams and rafters in steel-framed commercial buildings where bending governs the member design. A UB 457 x 152 x 60 in S355JR typically spans 6-9 m between columns at floor level; its parallel flanges allow flush end-plate moment connections without cope-cutting, accelerating fabrication. Per the British Steel UB datasheet, depths from UB 254 to UB 610 cover most commercial floor-beam applications. Designers verify moment capacity (M_c,Rd), shear capacity (V_c,Rd) and deflection (typically span/360) per Eurocode 3.

Recomendado

UB 254x146x31 (Light primary beam for short spans) UB 457x152x60 (Standard primary beam for medium spans) UB 610x229x101 (Heavy primary beam for long spans)
🏭

Portal-Framed Warehouse Rafters

Portal frames in single-storey warehouses and industrial sheds use UB sections as rafters and columns to form clear-span structures typically 20-40 m wide. A UB 533 x 210 x 82 in S275JR or S355JR is a common rafter size; the tapered rafter concept can be achieved by stepping down to UB 457 x 152 x 60 at the eaves. The parallel-flange geometry simplifies the haunch detailing at the rafter-to-column joint, and the UB mass per metre values from the British Steel datasheet allow quick preliminary sizing.

Recomendado

UB 457x152x60 (Eaves rafter section) UB 533x210x82 (Main rafter and column section)
🏭

Crane Girder Beams

UB sections are routinely used as crane girders in industrial buildings where overhead cranes impose heavy wheel loads and fatigue cycles. A UB 610 x 229 x 101 or UB 533 x 210 x 82 typically supports a 5-10 tonne crane; thicker flanges resist the localised wheel-load bending. UB's parallel flanges simplify the addition of crane-rail clamps and stiffener plates. The British Steel UB datasheet provides the elastic section modulus (Wel.y) required for combined bending plus fatigue checks per BS 5950 or Eurocode 3 Part 1-9.

Recomendado

UB 533x210x82 (Crane girder for medium-duty cranes) UB 610x229x101 (Crane girder for heavy-duty cranes)
🌉

Short to Medium-Span Highway Bridge Girders

UB sections are used as main girders in composite highway bridges for spans up to approximately 30 m. A UB 914 x 305 x 253 in S355J2 with sub-zero impact testing is typical for 25-30 m composite spans; the I-section geometry allows efficient shear stud placement on the top flange for composite action with a concrete deck. Designers check fatigue at the stud location and verify buckling resistance per BS 5400 or Eurocode 3 Part 1-9 and Part 2.

Recomendado

UB 457x152x60 (Internal beam for ladder-deck bridges) UB 914x305x253 (Main girder for composite spans)
🏭

Mezzanine Floor Joists

UB sections in light serial sizes (UB 203 x 133 x 25 to UB 305 x 165 x 40) are widely used as mezzanine floor joists in warehouses, retail fit-outs and industrial platforms. The 6-9 m typical joist span is efficiently covered by a UB 254 x 146 x 31 in S275JR; UB parallel flanges simplify the welded shear-stud connection to the composite metal deck above. The British Steel UB datasheet provides mass per metre values for quick dead-load estimation.

Recomendado

UB 203x133x25 (Light joist for short spans) UB 254x146x31 (Standard mezzanine joist) UB 305x165x40 (Heavy mezzanine joist for storage loads)
🏭

Roof Purlins and Side Rails (with Stubs)

While dedicated cold-formed purlin sections are more common, heavy UB stubs (UB 127 x 76 x 13) are sometimes used as side rails on industrial buildings where impact resistance or robustness is required. The 127 mm depth and 13 kg/m mass suit short rafter spacings of approximately 1.5 m. UB's hot-rolled mill scale finish offers better corrosion resistance than cold-formed alternatives for exposed agricultural or coastal environments.

Recomendado

UB 127x76x13 (Light side rail / purlin stub) UB 203x133x25 (Medium side rail for impact loading)

Resumo dos produtos recomendados

UB 254x146x31 Light primary beam for short spans Usado em: Multi-Storey Commercial Building Frames, Mezzanine Floor Joists UB 457x152x60 Standard primary beam for medium spans Usado em: Multi-Storey Commercial Building Frames, Portal-Framed Warehouse Rafters, Short to Medium-Span Highway Bridge Girders UB 610x229x101 Heavy primary beam for long spans Usado em: Multi-Storey Commercial Building Frames, Crane Girder Beams UB 533x210x82 Main rafter and column section Usado em: Portal-Framed Warehouse Rafters, Crane Girder Beams UB 914x305x253 Main girder for composite spans Usado em: Short to Medium-Span Highway Bridge Girders UB 203x133x25 Light joist for short spans Usado em: Mezzanine Floor Joists, Roof Purlins and Side Rails (with Stubs) UB 305x165x40 Heavy mezzanine joist for storage loads Usado em: Mezzanine Floor Joists UB 127x76x13 Light side rail / purlin stub Usado em: Roof Purlins and Side Rails (with Stubs)
What is a UB section in structural steel?
A UB (Universal Beam) is a hot-rolled I-shaped structural steel section manufactured to British Standard dimensions, with parallel inner and outer flange surfaces. According to the British Steel UB datasheet, UB sections are designated UB D x B x M where D is the section depth in millimetres, B is the flange width in millimetres, and M is the mass per metre in kilograms (e.g. UB 457 x 152 x 60 kg/m).
What steel grades are available for UB beams?
UB beams are supplied in EN 10025-2:2004 grades S235JR, S275JR/J0/J2 and S355JR/J0/J2, plus equivalent ASTM grades A36, A572 Gr 50 and A992 Gr 50 per Horizon Steel's UB datasheet. Grade selection depends on design code (BS 5950 or Eurocode 3), required yield strength and impact toughness at the lowest expected service temperature.
What is the difference between UB and UC sections?
UB (Universal Beam) sections have relatively narrow flanges compared with their depth and are optimised for bending about the strong axis, while UC (Universal Column) sections have near-equal depth and flange width and are optimised for axial compression. A UB 457 x 152 x 60 is roughly 457 mm deep and 152 mm wide across the flanges; a UC of comparable mass has a near-square profile.
What is the UB equivalent in European IPE sections?
There is no one-to-one UB to IPE equivalence because the metrication of the two standards diverged, but commonly quoted near-matches include UB 203 x 133 x 25 ~ IPE 200, UB 305 x 165 x 40 ~ IPE 300, and UB 457 x 152 x 60 ~ IPE 450. Engineers must verify section properties (Iyy, Wel.y) and classification before substituting across standards per Eurocode 3.
What is the equivalent of a UB in US W-shapes?
Common cross-Atlantic matches per SteelFlo's W-shape to UB chart include W4x13 ~ UB 100x100 (note: not in the standard UB serial range; W-shapes cover many metric sizes not listed as UB), W12x26 ~ UB 305x102x28, W18x35 ~ UB 457x152x32, and W36x210 ~ UB 920x305x201. Always verify mass per metre, depth and flange width before substituting.
Where can I buy UB sections online?
UB sections are stocked by steel service centres such as British Steel (manufacturer-direct), Steelo, Steel Products Direct, and Kocaer Steel. Project-specific quotes typically require section size, grade, length, quantity and delivery postcode; mill-direct orders carry 4-8 week lead times per the British Steel datasheet.
What is the price of a UB 457 x 152 x 60 per metre?
As of 2026-10-10, UB 457 x 152 x 60 in grade S275JR is typically quoted in the GBP 450 to GBP 520 per tonne range ex-works from UK mills, equating to roughly GBP 27 to GBP 31 per metre given its 60 kg/m mass. Prices fluctuate with scrap and energy indices; project quotes should be requested from authorised stockholders for current values.
What is the typical lead time for UB beam delivery?
Standard UB serial sizes in S275JR/S355JR are commonly ex-stock from UK service centres with 3-7 working day lead times per British Steel network data. Mill-direct orders for non-standard lengths, special grades or large tonnages typically carry 4-8 week lead times. Cut-to-length, drilling and cambering add 1-2 weeks.
Is UB in stock at British Steel distributors?
Standard UB serial sizes in S275JR and S355JR are typically held in stock by UK service centres such as Steelo and Steel Products Direct, with common sizes like UB 254 x 146 x 31 and UB 457 x 152 x 60 usually available ex-stock. Non-standard grades, lengths above 18 m, or AISC-equivalent grades (ASTM A992) typically require mill order.
When should I choose UB over IPE or HEA beams?
Choose UB when the project is designed to BS 5950 or when UK connection detailing practices (flush end-plates, partial-depth end-plates) are specified, because UB parallel flanges simplify these connections. Choose IPE/HEA when Eurocode 3 is the design code and European stockholding is more readily available. Choose W-shape when the project is designed to AISC and US mill stock is preferred.
Is UB suitable for bridge construction?
Yes, UB sections are widely used as bridge girders for short to medium spans (typically 10-30 m) in both composite and non-composite configurations. For highway bridges, S355J2 with sub-zero impact testing is commonly specified; for rail bridges, designers must additionally comply with Network Rail or equivalent railway authority standards including fatigue and fracture requirements.
Can a UB be replaced by an IPE without redesign?
No - UB and IPE are not drop-in replacements because their serial size ranges, flange geometries and mass-per-metre values differ. A redesign is required to verify section classification, moment capacity, shear capacity, deflection and buckling resistance per Eurocode 3 or BS 5950. Substitution should follow the EN 10034 / IPE comparative tables published in steel design handbooks.
What is the best drop-in replacement for a UB section?
There is no drop-in replacement for a UB in the electronic-component sense, because UB is a structural steel shape rather than a packaged part. Within steel design the closest functional substitutes are UC (for columns), IPE / HEA / HEB (European equivalents) and W-shapes (US equivalents), but each requires a re-check of section properties and connection geometry.
Where can I download the UB datasheet PDF?
The British Steel Universal Beams datasheet PDF is available at the manufacturer's website (britishsteel.co.uk) under the sections product literature, and the Horizon Steel UB datasheet is hosted at horizonsteel.ae. Kocaer Steel also publishes a UB datasheet at kocaersteel.com. These PDFs list dimensions, mass per metre, surface area and section properties for the full UB serial range.
Where can I find the UB section properties table?
UB section properties (depth, flange width, web thickness, flange thickness, root radius, mass per metre, surface area, second moment of area and elastic/plastic section moduli) are tabulated in the British Steel Universal Beams datasheet, the Structolution hot-rolled UB properties list, and the Engineering ToolBox British Universal Columns and Beams reference.
What are the key specifications of UB that engineers should know?
The key UB specifications engineers must know are: serial size range UB 127 x 76 x 13 to UB 1016 x 305 x 487; steel grades S235/S275/S355 to EN 10025-2; parallel flange geometry per BS 4-1; dimensional tolerances per EN 10034; lengths 6-18 m standard; CE and UKCA marking; BES 6001 certification from British Steel. Design verification requires per-size mass, depth, flange width and section moduli from the manufacturer datasheet.
What is the equivalent of a UB section in Australian / Chinese standards?
Australian UB sections (to AS/NZS 3679.1) share the same serial size nomenclature as British UBs but are produced from 300PLUS grade steel. Chinese hot-rolled I-sections follow GB/T 706 and use HW (wide-flange), HM (medium-flange) and HN (narrow-flange) designations; for example, Chinese HN300 x 150 is approximately equivalent to UB 305 x 152 x 37 per the Scribd British Section Equivalent Tables document.

Dados de referência de engenharia para UB — comparação, orientação de projeto e informações de conformidade.

Guia de seleção

Choose UB when designing to BS 5950 or when UK-style connection detailing (flush end-plates, partial-depth end-plates) is preferred, because the parallel inner and outer flange surfaces simplify these connections and reduce fabrication time. Choose IPE or HEA when designing to Eurocode 3 with European stockholding, and choose W-shapes when designing to AISC with North American mill stock. Within the UB family, select the lightest section that satisfies moment, shear and deflection limits - common primary-beam sizes are UB 254 x 146 x 31 (light), UB 457 x 152 x 60 (medium) and UB 610 x 229 x 101 (heavy). For bridges and crane girders, additionally specify sub-zero impact-tested grades (S355J2 or better) and verify fatigue per the relevant part of Eurocode 3. Always source from BES 6001-certified mills with CE and UKCA marking to satisfy UK construction product regulations.

Comparação com alternativas

Parâmetro Este produto UB 254x146x31 UB 457x152x60 UB 610x229x101
Section Type Universal Beam (UB) Universal Beam (UB) Universal Beam (UB) Universal Beam (UB)
Brand British Steel British Steel British Steel British Steel
Design Standard BS 4-1 / EN 10034 BS 4-1 / EN 10034 BS 4-1 / EN 10034 BS 4-1 / EN 10034
Section Depth (mm) Size-dependent 254 mm 457 mm 610 mm
Mass per metre (kg/m) Size-dependent 31 kg/m 60 kg/m 101 kg/m
Steel Grades S235/S275/S355 S235/S275/S355 S235/S275/S355 S235/S275/S355
Flange Geometry Parallel flanges Parallel flanges Parallel flanges Parallel flanges
Manufacturing Process Hot rolled Hot rolled Hot rolled Hot rolled
Certification BES 6001, CE/UKCA BES 6001, CE/UKCA BES 6001, CE/UKCA BES 6001, CE/UKCA

Principais diferenciais

  • Parallel flange geometry for simplified connection detailing (vs IPE section)
  • UK mill-direct manufacture with BES 6001 certification (vs Imported UB)
  • Wide serial size range from 127 mm to 1016 mm depth (vs UC (Universal Column))

Notas de projeto

Designers must check UB sections to BS 5950-1 (legacy UK code) or Eurocode 3 (EN 1993-1-1) as applicable to the project location and specification. Section classification (Class 1-4 for cross-section, Class 1-3 for buckling) must be assigned before moment or compression resistance is calculated; UB parallel flanges typically produce Class 1 or 2 sections at common UB 254-457 sizes in S275/S355. Verify shear area, shear buckling resistance and moment-shear interaction per the relevant code.

A common pitfall when substituting UB across standards is assuming a UB has the same moment capacity as an apparently similar IPE or W-shape. UB serial sizes are not directly interchangeable with IPE or W-shape serial sizes - section depth, flange width, flange thickness and root radius all differ. Always check Wel.y (elastic section modulus) and Wel.y / mass ratio, not just mass per metre, when proposing a substitute. Use the British Steel UB datasheet or Structolution UB properties table as the authoritative source.

For structures subject to elevated temperatures (fire, chimney shafts, boiler houses), the strength reduction factors for UB steel grades must be applied per Eurocode 3 Part 1-2 or BS 5950-8. S275 loses approximately 50% of its yield strength at 550 C and S355 at approximately 540 C per EN 1993-1-2. For external steelwork in fire-resistant design, fire protection (intumescent coating, board, sprayed vermiculite) is typically required unless a fire engineering analysis justifies a bare-steel solution.

Informações de conformidade

RoHS
Not Applicable
REACH
Not Applicable
AEC-Q100
Not Applicable
Sem chumbo
Not Applicable
Sem halogênios
Not Applicable
Minerais de conflito
Compliant

UB is a structural steel section, not an electronic component; RoHS, REACH and AEC-Q100 do not apply. British Steel UB sections are BES 6001 certified for responsible sourcing and carry CE and UKCA marking per the Construction Products Regulation. Steel manufacture is conflict-minerals compliant per British Steel's annual reporting.

Dados verificados em: 2026-10-10 — dados verificados e curados pela equipe de engenharia de componentes da XAIPART

Buscas relacionadas

UB universal beam datasheet British Steel UB sizes UB 457x152x60 specifications UB hot rolled steel section UB vs IPE section comparison UB to W-shape equivalent buy UB steel beam UK UB price per tonne 2026 UB S275JR S355JR grade UB bridge girder application UB portal frame rafter size what is a universal beam section

Componentes & termos relacionados

British Steel UB Universal Beam Universal Column UC IPE HEA HEB W-shape BS 4-1 EN 10034 EN 10025-2:2004 S235JR S275JR S355JR Eurocode 3 BS 5950 AISC BES 6001 CE marking UKCA marking parallel flange I-section hot rolled steel section

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