B2B & Public Tender Scaffolding Technical Specification Clauses: Steel Grades, Wall Thickness & EN Standards
Standardized procurement and tender specification clauses engineered for general contractors, EPC firms, and public authorities to eliminate sub-gauge tubing and uncertified fabrication.
| System / Sub-Assembly | Governing Standard | Steel Grade & Section Geometry | Welding & Corrosion Protection |
|---|---|---|---|
| H-Type Safe Facade Frame | EN 12810-1 / EN 12811-1 | S235JR / S355JR · Ø48.3 × 2.5 / 3.0 mm Tube | EN ISO 3834-2 Robotic Weld + EN ISO 1461 Hot-Dip Galv. |
| Ringlock Standard & Ledger | EN 12811-1 / NF 096 | S355JR / S235JR · Ø48.3 × 3.0 mm + Ø125 mm Rosette | EN ISO 3834-2 + EN ISO 1461 Hot-Dip Galvanized |
| Perforated Steel Walk-Board | EN 12811-1 Class 3 / 4 | 1.50 mm Roll-Formed Anti-Slip Steel · 30×250/300 cm | EN ISO 1461 Batch Hot-Dip (SM-F234/H139) or EN 10346 |
| Mobile Working Tower | EN 1004-1 (250 kg/m²) | Structural Alu Alloy or Hot-Dip Galvanized Steel | Certified Welding + Dual-Brake Lockable Casters |
| Temporary Slab Edge Barrier | EN 13374 Class A | 105×250 cm Welded Mesh Panel + 150 mm Steel Toeboard | Galvanized Post + High-Visibility Powder Coated Mesh |
| Right-Angle & Swivel Couplers | EN 74-1 Class B | Ø48.3 × 48.3 mm Drop-Forged Steel + 8.8 T-Bolt | Zinc Plated / Hot-Dip Galvanized Corrosion Finish |
1. Why Procurement Tenders Must Specify Pipe Gauge & Net Tonnage
Requesting "1,000 m² of scaffolding" without specifying Ø48.3 mm structural steel wall thickness, full-level steel decking, and EN ISO 1461 hot-dip galvanizing invites sub-standard thin-walled painted quotes that fail HSE inspections. Always anchor tender evaluations on itemized SKU counts and verified net metric tonnage.
2. Core Tender Clauses: EN 12810/12811, EN ISO 3834-2 & EN ISO 1461
Mandate certified EN 10219 structural steel tubes (Ø48.3 mm OD), robotic fusion welding certified under EN ISO 3834-2, post-fabrication batch hot-dip galvanizing per EN ISO 1461 (55–85+ µm), 1.5 mm perforated anti-slip steel walk-boards with wind locks, 150 mm steel toeboards, and EN 74-1 drop-forged couplers.
3. Mobile Tower (EN 1004-1) & Slab Edge Protection (EN 13374 Class A) Clauses
Specify EN 1004-1 mobile working towers rated at 250 kg/m² with 4 telescopic outriggers and dual-brake casters, alongside EN 13374 Class A welded mesh perimeter barriers featuring integrated 150 mm toeboards and non-drilling slab/beam clamp post options. Send your project parameters via our B2B Proforma & WhatsApp Engineering Form for a full tender BOQ.
