Special connecting parts Q355B carbon steel For steel structures in factory

Core Advantages

Complete Product Range for One-Stop Supply of Steel Structure Auxiliary Materials: Covers all accessories for foundation embedment, beam-column connections, roof/wall secondary structures, and structural reinforcement. No need to source bolts, tie rods, and embedments from multiple suppliers, reducing coordination costs and procurement cycles, facilitating unified project material preparation.

Clear Strength Grading with Precise Matching to Load-Bearing Locations: Key load-bearing beam-column nodes use 10.9-grade high-strength bolts; secondary structures and enclosures use galvanized ordinary bolts; foundations use thickened anchor bolts. Clear load grading ensures structural safety and complies with steel structure construction acceptance codes.

Multiple Anti-Corrosion Processes for Various Working Conditions: Blackening + galvanizing for ordinary plant areas; hot-dip galvanizing and DACROMET coating for coastal and chemically corrosive environments. Uniform zinc coating with strong adhesion resists corrosion during long-term outdoor use, with service life synchronized with the main steel structure.

Factory-Standardized Prefabrication with High Dimensional Accuracy and Construction Efficiency: Anchor bolts, gusset plates, and tie rods are all CNC-blanked and cut-to-length with unified thread standards. No on-site secondary cutting or threading is required. Bolts are directly assembled with no on-site welding, significantly shortening steel structure installation periods.

Stable Mechanical Performance: Tie rods, knee braces, and column bracing accessories work together to restrain lateral deformation of purlins and steel beams, providing greater load-bearing capacity.

Product Parameters

Product Subcategories and Application Scenarios

(1) Foundation Embedment Accessories (Factory Foundation Anchoring)

Anchor Bolts (Anchor Bolt Assemblies): Embedded into concrete foundations with base plates, nuts, and washers to secure the bottom of steel columns, transferring the entire factory's vertical pressure and wind loads—core accessories for factory foundations.

Embedded Steel Plates and Shear Studs: Embedded in equipment foundations, mezzanine floors, and steel-concrete composite floors to enhance the bonding strength between concrete and steel structures.

(2) Main Frame Connection Fasteners (Primary Load-Bearing Beam-Column Nodes)

10.9-Grade Shear-Type/Large Hexagon High-Strength Bolts: For steel column-to-beam splices, main frame connections, and crane beam fixing, bearing heavy-load shear and tension forces—core fasteners for factory structural safety.

Ordinary Galvanized Bolts and Gusset Plates: For splicing of bracing, tie members, wind-resistant columns, and other secondary components—easy to assemble/disassemble, corrosion-resistant.

(3) Secondary Structure Stabilization (Dedicated for C/Z Purlins)

Purlin Brackets: Welded to the side of steel beams to support and fix C/Z purlins, evenly distributing roof and wall loads.

Round Steel Tie Rods and Sleeve Struts: Lateral ties between purlins to prevent purlin twisting and lateral instability under compression—available as straight and diagonal tie rods.

Knee Braces: Connecting the lower flange of roof beams to purlins to constrain lateral deformation of steel beams—essential reinforcement for large-span roofs.

Turnbuckles (Adjustable Threaded Rods): For tension adjustment of tie rods to accommodate construction dimensional tolerances, ensuring the secondary structure remains straight and stable.

(4) Bracing System Reinforcement Components

Column Bracing and Roof Horizontal Bracing Gusset Plates: Connection nodes for angle steel bracing and steel tube tie members, forming an overall stable truss system to resist high winds and seismic lateral forces.

Tie Members and Sleeves: Longitudinally connecting steel columns and beams to maintain longitudinal spacing and prevent overall lateral displacement.

(5) Applicable Building Scenarios

• Complete main structure supporting for standard single-story steel workshops and heavy-load crane-served machining workshops;
• Secondary structure stabilization accessories for large logistics warehouses, cold-chain cold storage, and high-standard warehousing;
• Large-span steel structure supporting for multi-story frame office buildings, exhibition halls in industrial parks, and gymnasiums;
• DACROMET/hot-dip galvanized anti-corrosion accessory sets for coastal and chemically corrosive plant areas;
• Replacement of aged/corroded steel structure connectors in old factory renovation, heightening, and reinforcement projects;
• Simple supporting for temporary site buildings, material sheds, and parking canopy light-gauge steel structures.

FAQ

Q1: How to distinguish between high-strength bolts and ordinary galvanized bolts, and when to use each?

A1: 10.9-grade high-strength bolts are applied for primary load-bearing nodes such as steel columns, steel beams, and crane beams, which undertake large shear and tension forces. Ordinary galvanized bolts are only suitable for secondary load-bearing positions including purlins, bracings and guardrails. The two types of bolts are not interchangeable.

Q2: Which anti-corrosion process is suitable for accessories in coastal plants prone to rust?

A2: Integral hot-dip galvanized accessories are the preferred choice. For coastal areas with severe salt fog and chemical workshops, DACROMET coating is recommended for upgrading. It features stronger zinc layer adhesion and excellent resistance to chloride corrosion, greatly extending the service life of structural accessories.

Q3: How to confirm the length and specifications of anchor bolts?

A3: The specifications are calculated according to the factory height, steel column load and concrete foundation thickness. Heavy-load crane workshops require anchor bolts with larger diameters and thickened anchor plates. We can provide professional load calculation verification to match the most suitable anchor bolt specifications.

Q4: Can tie rods and knee braces be omitted during construction?

A4: Omission is not recommended. For large-span roofs and high-wind areas, missing tie rods and knee braces will cause torsion and deformation of purlins and steel beams, resulting in wavy roof surfaces, seriously endangering structural safety and damaging the overall waterproofing performance.

Q5: Can structural accessories be cut or welded on site?

A5: On-site cutting of bolts and tie rods will damage threads and anti-corrosion layers, causing premature rusting and functional failure. On-site welding of gusset plates requires secondary anti-corrosion paint treatment. Factory integral prefabrication is strongly recommended