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BSI · STANDARD

BS
EN 15048-1

Non-preloaded structural bolting assemblies — General requirements

§ 01

Overview

What this standard covers

Requirements for ordinary bearing type structural assemblies marked SB, used where preload is not required.

Requirements for ordinary bearing type structural assemblies marked SB, used where preload is not required.

Who uses it

Connection designers, fabricators and site teams selecting and tightening structural assemblies.

§ 02

Details

Reference data

Standard number
BS EN 15048-1
Title
Non-preloaded structural bolting assemblies — General requirements
Organisation
BSI
Country
United Kingdom
Region
United Kingdom
Subject
Bolting
Subcategory
Non-preloaded
Type
STANDARD
Application
Contractual
Availability
Paid
Status
CURRENT
Roles
bolting standard
Last verified
2026-09-06

Official source: knowledge.bsigroup.com

§ 03

Related

Standards used alongside this one

  • BS EN 14399-1

    High-strength structural bolting assemblies for preloading — General requirements

    The framework for preloaded assemblies: bolt, nut and washer are qualified together as a K-class assembly, not mixed between suppliers.

    United KingdomBoltingCURRENTPaid

  • BS EN ISO 898-1

    Mechanical properties of fasteners made of carbon steel and alloy steel — Bolts, screws and studs

    Defines property classes such as 8.8 and 10.9, which set proof load, tensile strength and hardness for the fastener.

    United KingdomBoltingCURRENTPaid

  • ASTM F3125/F3125M

    High Strength Structural Bolts and Assemblies

    The consolidated specification covering grades A325, A490, F1852 and F2280 structural bolts and twist-off assemblies.

    United StatesBoltingCURRENTPaid

  • ASTM F959

    Compressible-Washer-Type Direct Tension Indicators

    Direct tension indicating washers used to verify bolt preload by measuring gap closure.

    United StatesBoltingCURRENTPaid

  • BS EN 14399-10

    Preloaded bolting assemblies — System HRC bolt and nut assemblies with calibrated preload

    Tension control bolts whose spline shears off at the calibrated preload, giving a visible indication of correct tightening.

    United KingdomBoltingCURRENTPaid

  • BS EN 14399-3

    Preloaded bolting assemblies — System HR hexagon bolt and nut assemblies

    System HR assemblies in property classes 8.8 and 10.9, the common UK preloaded system.

    United KingdomBoltingCURRENTPaid

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.

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.