How to select Structural Bolts & Assemblies-High Strength Structural Fasteners Manufacturer.
Structural Bolts and Assemblies are back bone of any Construction, Foundation, heavy engineering, infrastructure, power plants and telecom tower installations. High-Strength structural bolts with Proper Grade Steel & Suatbale Coating ensure strong, reliable and durable strength to steel structures and critical construction projects.
In the world of construction and structural engineering, the integrity of every connection matters. the choice of Structural Bolts & Nuts is a critical decision that impacts safety, compliance, and longevity. BRK Nuts and Bolts has established itself as a premier manufacturer and supplier of high-grade BS-En certified structural bolt assembly and other Graded High Strength fasteners designed to meet the rigorous demands of modern engineering.
EN 15048 Structural Bolt Assemblies for non-preloaded
EN 14399: Structural Bolting the Standard for High-Strength Preloaded
BS 7419: Holding Down Bolt (also known as an anchor bolt or foundation bolt)
EN 15048 Structural Bolt Assemblies:
EN 15048 is the European standard for Structural Bolt assemblies used in non-preloaded connections . These are used to joints where the bolts are tightened to a snug-tight condition, and the forces are transferred primarily through shear and bearing between the connected plates.
Where to Use: Ideal for structures with predominantly static loads, such as single-story industrial buildings, platforms, walkways, and telecommunication towers.
Bolts and nuts must be supplied as a complete certified assembly from a single manufacturer with CE Marking “SB” (Structural Bolting) Identification.
They are available in a wide range from 4.6 up to 10.9 grades.
EN 14399: Structural Bolts the Standard for High-Strength Preloaded
EN 14399 is European CE standard for Structural Bolts assemblies specifically designed for preloaded connections. In this Bolt Assembly joints are tightened with a controlled torque to develop a high clamping force (preload), which creates a friction-grip connection. This significantly improves fatigue resistance and performance under dynamic loads.
Where to Use: Used in Structure with vibration and requires dynamic loading or tensile stresses. Common applications include bridges, cranes, high-mast lighting, and heavy equipment supports.
Hardened washers are mandatory components of the assembly. Must be CE marked with Tracing of Manufacturers Batch.
BS 7419: Holding Down Bolt (also known as an Anchor bolt or Foundation bolt)
BS 7419 Holding Down Bolts are a specialized type of fastener used to secure steel structures, columns, or machinery to their concrete foundations.
Where to Use: Used for anchoring into concrete i.e. its called Anchoring Bolt. They are embedded into the foundation or placed in pockets and grouted in place during construction as Foundation Bolt.
BS 7419 Standard covers bolts from M16 to M64 . It specifically includes Holding Down Bolts with square heads and square necks (to prevent rotation during tightening).
| Feature | EN 15048 | EN 14399 | BS 7419 |
|---|---|---|---|
| Primary Uses | structural Bolting assemblies (Non-preloaded) | High-strength structural bolting assemblies (for preloading) | Holding down bolts Also known as Anchor Bolt & Foundation Bolt |
| Application | Static loads in industrial buildings, platforms, telecom towers | Dynamic loads, bridges, cranes, structures subject to vibration | Column base plates, foundation connections, anchoring machinery |
| Thread Size | M12 to M39 (for steel structures) | M12 to M36 | M16 to M64 |
| Property Classes | 4.6, 4.8, 5.6, 5.8, 6.8, 8.8, 10.9 | 8.8/8, 8.8/10, 10.9/10 | Not specified by property class; defined by dimensional and material requirements |
| Design Characteristics | Standard hexagon heads; washers optional | System HR (bolt elongation) or HV (thread deformation); hardened washers required | Square heads with square necks; hexagon heads also specified |
| Installation | Simple tightening; no preload required | Controlled preloading (min. 0.7 fub × As) | Cast into concrete or installed in pockets; standard nut tightening |
| CE Marking | Yes (for complete assembly) | Yes (for complete assembly) | No (its British Standard) |
How to Choose the Right Standard Structural Bolt
Your choice depends entirely on the structural project:
EN 15048 is used for standard structural steelwork with static loads in buildings, platforms, or telecom structures where preload is not required.
EN 14399 is used for critical connections in bridges, cranes, or any structure subject to dynamic loads, vibration, or where slip resistance is critical.
BS 7419 holding down bolts is used for anchoring columns, base plates, or equipment to concrete foundations.