Flat Bars - Steel Flats

BS EN 10025-2 : 2004 - S275JR

Steel flat bars are essential rectangular sections known for their smooth, flat surfaces and versatility. Often called Steel Flats, Flat Stock, or Rectangular Bars in the trade, these sections are engineered for dimensional accuracy and durability across the UK’s construction and engineering sectors. As a leading UK stockholder, Barrett Steel supplies an extensive range of structural steel to both large-scale contractors and the DIY market.


Our flat bars feature a clean rectangular cross-section with consistent thickness throughout, providing the structural integrity needed for standard builds and bespoke projects alike. The flat profile of these sections makes them easy to work with.

They can be punched, drilled, or cut into custom shapes for specialised jobs. Whether you are stiffening a structural beam or fabricating industrial components, our steel flats offer a reliable, precision-finished solution.

Primary Applications

  • Construction & Infrastructure: Essential for bracing, secondary supports, and load-bearing elements in bridges and platforms.
  • Industrial Fabrication: Used for heavy-duty racking, storage structures, and machinery components.
  • Agricultural: Ideal for wear strips, support brackets, and farm machinery framework.
  • General Steelwork: The standard choice for high-quality gates, fencing, stringers, tie rods, and brackets
Flat Bars - Steel Flats
 
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Flat Bar Sizes & Weights

Size (mm) Kg/m
10 x 3 0.26
13 x 3 0.33
16 x 3 0.39
20 x 3 0.49
25 x 3 0.63
30 x 3 0.75
35 x 3 0.85
40 x 3 0.95
45 x 3 1.06
50 x 3 1.25
60 x 3 1.44
75 x 3 1.77
80 x 3 1.89
100 x 3 2.36
150 x 3 3.54
13 x 5 0.51
16 x 5 0.63
20 x 5 0.79
25 x 5 0.98
30 x 5 1.18
35 x 5 1.37
40 x 5 1.57
45 x 5 1.77
50 x 5 1.96
60 x 5 2.36
65 x 5 2.55
70 x 5 2.76
75 x 5 2.97
80 x 5 3.14
90 x 5 3.53
100 x 5 3.93
110 x 5 4.32
120 x 5 4.71
130 x 5 5.11
150 x 5 5.89
13 x 6 0.61
16 x 6 0.75
20 x 6 0.94
25 x 6 1.18
30 x 6 1.41
40 x 6 1.88
45 x 6 2.12
50 x 6 2.36
60 x 6 2.83
65 x 6 3.06
70 x 6 3.31
75 x 6 3.55
80 x 6 3.77
90 x 6 4.24
100 x 6 4.71
110 x 6 5.18
120 x 6 5.66
130 x 6 6.12
140 x 6 6.59
150 x 6 7.09
180 x 6 8.48
200 x 6 9.42
220 x 6 10.36
250 x 6 11.78
300 x 6 14.13
20 x 8 1.26
25 x 8 1.57
30 x 8 1.88
35 x 8 2.25
40 x 8 2.51
45 x 8 2.83
50 x 8 3.14
60 x 8 3.77
65 x 8 4.08
70 x 8 4.39
75 x 8 4.71
80 x 8 5.02
90 x 8 5.65
100 x 8 6.28
110 x 8 6.91
120 x 8 7.54
130 x 8 8.16
140 x 8 8.79
150 x 8 9.42
180 x 8 11.31
200 x 8 12.59
220 x 8 13.82
250 x 8 15.69
300 x 8 18.84
20 x 10 1.57
25 x 10 1.96
30 x 10 2.36
35 x 10 2.75
40 x 10 3.14
45 x 10 3.53
50 x 10 3.93
60 x 10 4.71
65 x 10 5.11
70 x 10 5.49
75 x 10 5.89
80 x 10 6.28
90 x 10 7.07
100 x 10 7.85
110 x 10 8.64
120 x 10 9.42
130 x 10 10.21
140 x 10 10.99
150 x 10 11.78
160 x 10 12.56
180 x 10 14.13
200 x 10 15.69
220 x 10 17.27
250 x 10 19.59
300 x 10 23.55
350 x 10 27.48
400 x 10 31.41
20 x 12 1.88
25 x 12 2.36
30 x 12 2.83
35 x 12 3.37
40 x 12 3.77
45 x 12 4.24
50 x 12 4.72
60 x 12 5.65
65 x 12 6.12
70 x 12 6.59
75 x 12 7.05
80 x 12 7.54
90 x 12 8.48
100 x 12 9.42
110 x 12 10.41
120 x 12 11.31
130 x 12 12.34
140 x 12 13.25
150 x 12 14.13
160 x 12 15.07
180 x 12 16.96
200 x 12 18.84
220 x 12 20.72
250 x 12 23.55
300 x 12 28.26
350 x 12 33.01
400 x 12 37.68
450 x 12 42.39
25 x 15 2.94
30 x 15 3.53
35 x 15 4.21
40 x 15 4.71
45 x 15 5.31
50 x 15 5.89
60 x 15 7.07
65 x 15 7.65
70 x 15 8.24
75 x 15 8.85
80 x 15 9.42
90 x 15 10.61
100 x 15 11.78
110 x 15 12.95
120 x 15 14.09
130 x 15 15.31
140 x 15 16.48
150 x 15 17.66
160 x 15 18.81
180 x 15 21.22
200 x 15 23.55
220 x 15 25.91
250 x 15 29.44
300 x 15 35.33
350 x 15 41.25
400 x 15 47.09
450 x 15 52.99
25 x 20 3.92
30 x 20 4.71
40 x 20 6.28
45 x 20 7.07
50 x 20 7.85
60 x 20 9.42
65 x 20 10.21
70 x 20 10.99
75 x 20 11.81
80 x 20 12.56
90 x 20 14.13
100 x 20 15.72
110 x 20 17.27
120 x 20 18.84
130 x 20 20.41
140 x 20 21.98
150 x 20 23.55
160 x 20 25.12
180 x 20 28.26
200 x 20 31.41
220 x 20 34.54
250 x 20 39.25
300 x 20 47.15
350 x 20 54.95
400 x 20 62.81
450 x 20 70.65
30 x 25 5.89
40 x 25 7.85
45 x 25 8.83
50 x 25 9.81
60 x 25 11.78
65 x 25 12.76
70 x 25 13.74
75 x 25 14.71
80 x 25 15.71
90 x 25 17.68
100 x 25 19.63
110 x 25 21.59
120 x 25 23.55
130 x 25 25.51
140 x 25 27.48
150 x 25 29.44
160 x 25 31.41
180 x 25 35.33
200 x 25 39.25
220 x 25 43.18
250 x 25 49.06
300 x 25 58.88
350 x 25 68.69
400 x 25 78.51
450 x 25 88.31
40 x 30 9.42
45 x 30 10.65
50 x 30 11.78
60 x 30 14.13
65 x 30 15.31
70 x 30 16.49
75 x 30 17.71
80 x 30 18.84
90 x 30 21.22
100 x 30 23.55
110 x 30 25.89
120 x 30 28.35
130 x 30 30.62
140 x 30 32.99
150 x 30 35.33
180 x 30 42.39
200 x 30 47.11
220 x 30 51.81
250 x 30 58.88
300 x 30 70.65
350 x 30 82.43
400 x 30 94.21
50 x 40 15.71
60 x 40 18.84
65 x 40 20.41
70 x 40 21.96
80 x 40 25.12
100 x 40 31.41
150 x 40 47.11
180 x 40 56.52
65 x 50 25.52
80 x 50 31.41
100 x 50 39.25
150 x 50 58.88
200 x 50 78.51
The Barrett Advantage: UK Stock & Precision Processing

At Barrett Steel, we stock flat bars primarily in S275JR grade (EN 10025), ensuring consistent yield strength and weldability for structural applications. To streamline your build, we provide full in-house processing at our UK depots, including:

  • Precision Saw Cutting: Close-tolerance cut-to-length services for immediate assembly.

  • Drilling & Punching: Accurate bolt-hole preparation for framework and bracing.

  • Custom Profiling: Bespoke shapes tailored to your engineering drawings.

  • Surface Treatment: Options for shot-blasting and priming to protect against corrosion.

With a nationwide network of over 25 regional depots, we provide 100% UKCA and CE-marked steel. Our own transport fleet handles every delivery, supporting Just-in-Time (JIT) schedules for major infrastructure projects and local trade alike.

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Why Choose Barrett Steel

About Us

Discover the Barrett Group strength behind your supply.

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Sectors

Supporting your projects across a wide range of sectors.

Expert FAQs

Specific to Barrett Steel
Yes, Bring a Suitable Vehicle!

Suitable Vehicles for collections are :
  • Curtain Sided Vehicles,
  • Hiab Vehicles
  • and any open topped vehicle such as a Flat Bed.

ALL vehicles must have a minimum bed length of 4m, be rated for the weight and dimensions of your order Equipped with appropriate load space Fitted with approved lashing or strapping points In a safe, roadworthy condition
We do not permit collections for items over 25kg in: Cars, Vans, estate vehicles, or SUVs,  makeshift trailers or modified vehicles, Pickups without high sides or proper strapping systems Vehicles with visible defects
With over 25 depots across the UK and Ireland, we offer nationwide supply and local expertise for any project size.
Yes. With a fleet of over 100 vehicles and 25+ local depots, we specialise in timed deliveries for congested sites. Our FORS-accredited drivers arrive exactly when your lifting equipment is ready.
All structural steel from Barrett Steel is CE and UKCA marked, a legal requirement for UK construction. We provide the Mill Test Certificates (MTC) required by Building Control and structural engineers to sign off on project compliance. Check out Our Quality Management page.
With over 25+ depots nationwide, we are likely just around the corner. Our dedicated fleet offers next-day delivery across the UK, including major hubs like London, Birmingham, Leeds,Glasgow and Belfast. Because we ship from the depot closest to your site, we minimise lead times and transport costs. FInd your local depot using our depot finder.
We offer cut-to-length, precision drilling, and custom profiling. Check out our general processing services here.
With 25+ depots nationwide, we offer rapid delivery across the UK and Ireland. Find your local depot here. 
Yes. While our standard stock lengths are typically 6 metres, our in-house CNC saw-cutting service allows us to provide bars cut to your exact millimetre requirements. This reduces on-site waste and ensures your steel is ready for immediate installation upon delivery.
General Facts
'General Steels' is our division for core structural profiles used in framing and fabrication. This includes: Universal Beams, Columns, Channels, Angles and Hollow Sections.
Their rectangular profile and flat surfaces offer exceptional versatility for bracing and general steelwork.
We supply them in S275JR grade to ensure consistent strength and durability.
The standard formula for mild steel is:

Width (mm) \times Thickness (mm) \times 0.00785 = Weight\ per\ metre\ (kg/m)

For example, a 50mm x 6mm flat bar weighs approximately 2.36kg per metre.
Yes. Flat bars are frequently used in infrastructure for reinforcement, secondary load-bearing members in bridges, and walkway platforms. Our flat bars are 100% UKCA and CE compliant, meeting all necessary safety standards for public works.