The Excalibur Scaffolding Ring Bolts 12mm is used for the fixing of a vertical scaffold tube to a structure – safely, conveniently and securely.
A major advantage of this type of anchor lies in it being a once piece tie; when the project is finished and the scaffold struck, there is nothing left in the wall which may lead to further issues and the hole can be simply plugged.
During manufacture, the eye part is closed by a weld and when tested gave an ultimate tensile failure load of 50kN. With a suggested safety factor of 5:1, the SWL of 10kN exceeds that of the scaffold clip and is on par with the load imposed on a brick wall.
Excalibur Scaffold Ring Bolts 12mm
| Ringbolt Diameter | Ringbolt Internal Diameter | Clearance Hole Diameter | Safe Load on eye | Max Fixing Thickness ‘A’ | Thread Length ‘B’ | Clearance Depth ‘C’ | Box Quantity | Order code: |
|---|---|---|---|---|---|---|---|---|
| 12mm | 52mm | 15mm | 16.39 kN | – | 65 | 24 | 25 | SRB 12 / 120 x52 |
| Drill Bit Diameter | Concrete and Brick | 12.0mm |
| Soft Materials | 11.0mm |
| Material | Embedment Depth (mm) | Tensile Load kN. | Shear Load kN. | |||
|---|---|---|---|---|---|---|
| Ultimate | Safe | Ultimate | Safe | |||
| Concrete | 60 N/mm² | 60 | 38.70 | 12.90 | – | – |
| 60 N/mm² | 90 | 69.00 | 23.00 | 59.80 | 19.93 | |
| Concrete | 30 N/mm² | 60 | 26.50 | 8.83 | – | – |
| 30 N/mm² | 90 | 43.00 | 14.33 | 59.80 | 19.93 | |
| Engr. Brick | 100 N/mm² | 45 | 20.00 | 6.67 | – | – |
| Semi.Engr. | 70 N/mm² | 45 | 15.00 | 5.00 | – | – |
| Fletton | 20 N/mm² | 45 | 15.80 | 5.27 | – | – |
| Butterly | 20 N/mm² | 45 | 5.10 | 1.70 | – | – |
| Hemelite | 3.5 N/mm² | 75 | 12.10 | 4.03 | – | – |
| Lignacite | 3.5 N/mm² | – | – | – | – | – |
| Topcrete | 7.0 N/mm² | 75 | 18.90 | 6.30 | – | – |
| Material | Boron Steel BS3111/9/2.1.A |
|---|---|
| Finish | Zinc & Yellow passivated as standard, or mechanical zinc |
| Other finishes | Other platings & finishes are available to special order subject to quantity |
| Tensile strength | 800N/mm2 Case hardened |
| Other sizes | Other lengths of all diameters are available to special order subject to quantity |
| Embedment concrete and brick | Minimum recommended is 4.5 × bolt diameter |
| Soft block | Minimum recommended is 75mm |
ALL DIMENSIONS IN MILLIMETRES (MM)
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Our commitment to Total Reliability of Supply has established George Roberts as the leading independent scaffolding supplier in the UK and exporting worldwide.
On behalf of the Board of Directors, George Roberts would like to wish all our clients and staff a very Happy Christmas and a healthy, successful New Year.
We proudly helped 10 inspiring charities in 2024, contributing donations of £10,000.
