Checkout to get your delivery cost
Based in West Sussex
Trusted by customers
Discounts on large orders
Price range: £5.50 through £5.99 ex. VAT
Secure your scaffold tubes to steel I-beams with our premium Girder Clamps (Gravlock couplers), available in Standard and Swivel options for any steel structure. Designed for standard 48.3 mm scaffold tubes and beam frameworks up to 44 mm thick, these drop-forged galvanised connectors provide robust, reliable support where traditional bases won’t work. Use them in pairs to mount horizontal tubes and handrails, with the swivel variant offering flexible angle adjustment for complex builds. Engineered for strength, safety, and compliant performance on site.
Please use the drop-down menu below to purchase either the standard girder clamp or the swivel variety.
Checkout to get your delivery cost
Sussex Depote
Trusted by customers
Best prices
When working with steel-framed structures or adapting scaffolding to irregular layouts, you need connectors that combine strength, precision and versatility. Our girder clamps make attaching scaffold tubes to I-beam girders simple and secure – whether you choose the fixed Standard option for conventional 90° connections or the Swivel version to achieve angled tube positioning without weakening the link. Perfect for handrails, platforms and safe access around steelwork.
| Feature | Standard Girder Clamp | Swivel Girder Clamp |
| Material | Drop-forged galvanised steel | Drop-forged galvanised steel |
| Weight | 1.5kg | 2.0kg |
| Tube Compatibility | 48.3mm diameter scaffold tubes | 48.3mm diameter scaffold tubes |
| I-Beam Thickness | Up to 44mm | Up to 44mm |
| Angle | Fixed 90 degrees | Adjustable up to 45 degrees |
| Tightening Torque | 54Nm | 54Nm |
| Safe Working Load | 30kN (pairs resist 6.1kN slip-through) | 30kN (pairs resist 6.1kN slip-through) |
| Dimensions (approx.) | U-shaped: 150mm wide x 100mm deep | U-shaped: 150mm wide x 120mm deep |
Girder Clamps shine in scenarios where traditional scaffolding meets steel construction head-on. In warehouse builds or industrial retrofits, use them to anchor handrails along roof edges, keeping workers safely distanced from falls. They’re a staple for steel frame erections, where you need to tie scaffold tubes directly to girders for temporary walkways or perimeter protection. For maintenance jobs, like servicing high-bay lighting or HVAC systems, the swivel option lets you adapt to angled beams without custom fabrication. Even in shipyards or during bridge repairs, these clamps provide a quick, reliable way to secure ledgers and transoms. Customers love how they cut setup time while boosting overall stability, turning potential hazards into hassle-free access.
Safety isn’t just a checkbox; it’s the foundation of every job site. Our Girder Clamps are rigorously tested to handle real-world stresses, with a 30kN safe working load that supports suspended setups up to 15kN when used in pairs. That means no wobbles or surprises under load. We mandate pairing them one on the top flange, one on the bottom, to evenly distribute forces and avoid shear failures that could spell disaster. Galvanised finishes fend off rust in damp conditions, extending service life and reducing downtime.
On the compliance front, these clamps meet AS1576.2:1991 standards for scaffold couplers, ensuring they’re up to snuff for Australian and international regs. They’re also aligned with general UK construction guidelines under the Work at Height Regulations 2005. Pro tip: Inspect bolts pre-use and torque them properly with a calibrated spanner.
It’s a U-shaped steel connector that grips I-beam flanges to hold scaffold tubes in place. Simply slide it over the beam, thread in your tube, and tighten the bolt—boom, instant secure link for handrails.
Not always! Go standard for straight-up vertical jobs; swivel if your beams are at odd angles. Many kits include both for flexibility.
Each can handle 30 kN safely, but always pair them for loads up to 15 kN. Exceeding this risks failure don’t chance it.
Yes, they fit standard 48.3mm OD tubes from major brands. Double-check that your beam thickness doesn’t exceed 44mm.
Position the girder clamps on the flanges, insert a horizontal tube through both pairs, add a vertical post, which should be connected with scaffolding couplers, then torque the fitting nuts to 54 Nm. Test for stability before loading up.
Fully compliant with AS1576.2:1991, plus general scaffold safety norms. Galvanised for weather resistance too.
A single clamp is not considered safe for load-bearing or handrail applications. It may hold temporarily under very light loads, but it can easily rotate or slip under normal forces. Industry best practices and most safety regulations require pairs.
No. Girder clamps are designed for temporary scaffolding and access structures only. They are not approved for permanent structural connections or load-bearing applications.
Measure the thickness of the flange (not the overall beam depth). Our clamps are suitable for flanges up to 44 mm thick. If your flange is thicker than 44 mm, you will need a different type of beam clamp or a specialised wide-flange version.
Yes, they work on both I-beams and H-beams (universal beams), as long as the flange thickness is within 44 mm and the clamp can be properly seated on the flange.
Collections are available Monday through Friday, subject to stock availability. We can also deliver nationwide, subject to minimum quantity orders and the distance you are from our yard in Aldingbourne, West Sussex.
Need your order fast? We occasionally offer next-day delivery on select items for orders placed by 11:30 a.m. on weekdays. This service depends on stock, and an extra delivery charge will apply. We don’t deliver on weekends.
| Type | Standard girder clamp, Swivel girder clamp |
|---|
Reviews
There are no reviews yet.