§ Standards
Status
CURRENT
Last verified
2026-09-06
BSI · STANDARD
BS
EN 10034
Structural steel I and H sections — Tolerances on shape and dimensions
Overview
What this standard covers
Rolling tolerances for universal beams and columns, which is why measured flange thickness can differ from tabulated values.
Rolling tolerances for universal beams and columns, which is why measured flange thickness can differ from tabulated values.
Who uses it
Specifiers, buyers and mills confirming what a grade guarantees before it is ordered or substituted.
Details
Reference data
- Standard number
- BS EN 10034
- Title
- Structural steel I and H sections — Tolerances on shape and dimensions
- Organisation
- BSI
- Country
- United Kingdom
- Region
- United Kingdom
- Subject
- Materials
- Subcategory
- Tolerances
- Type
- STANDARD
- Application
- Contractual
- Availability
- Paid
- Status
- CURRENT
- Roles
- material standard
- Last verified
- 2026-09-06
Official source: knowledge.bsigroup.com
Related
Standards used alongside this one
- BS 4-1
Structural steel sections — Specification for hot rolled sections
The UK dimensional reference for universal beams, universal columns, parallel flange channels and joists.
United KingdomMaterialsCURRENTPaid
- ASTM A36/A36M
Carbon Structural Steel
The long established 36 ksi carbon structural grade, still common for plate, angle and channel.
United StatesMaterialsCURRENTPaid
- ASTM A370
Test Methods and Definitions for Mechanical Testing of Steel Products
How tensile, bend and impact tests on steel products are performed and reported — the basis of the values printed on a US mill certificate.
United StatesMaterialsCURRENTPaid
- ASTM A500/A500M
Cold-Formed Welded and Seamless Carbon Steel Structural Tubing
The usual US HSS specification for round, square and rectangular tubing, with grades B and C in common use.
United StatesMaterialsCURRENTPaid
- ASTM A501/A501M
Hot-Formed Welded and Seamless Carbon Steel Structural Tubing
Hot formed structural tubing, the closest US equivalent to hot finished EN 10210 hollow sections.
United StatesMaterialsCURRENTPaid
- ASTM A529/A529M
High-Strength Carbon-Manganese Steel of Structural Quality
Carbon-manganese structural grades used for lighter shapes, bars and plate.
United StatesMaterialsCURRENTPaid
Sourcing, review and use
Status
Editorial reference information compiled and maintained by the StructuralSteel.ai team. It is not a design certificate and is not issued under an engineer's seal.
Last reviewed
Calculations
Any figures produced on this page are indicative estimates for early sizing and comparison only — they are not engineered design outputs.
References
Final member selection, loading, connection design, fire design, fabrication and compliance must be verified for your specific project by a suitably qualified structural engineer. Standards are revised; check the edition in force where the work is built.
Verification
StructuralSteel.ai provides technical reference information and links to authoritative sources. Project specifications, applicable legislation, current standards editions and requirements of the responsible engineer or authority should always be verified before fabrication or supply.