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Description
A two-rail ball stanchion that bolts straight down onto a slab, deck or wall top. The welded base plate fixes to concrete, steel decking or a platform with anchors or bolts, giving a quick, rigid post for guard rails along walkways, docks and plant areas. Two 66mm forged balls, 500mm apart, are drilled through for 33.7mm (25NB) tube and lock the rails with M8 grub screws. Hot-dip galvanised for outdoor use. The price shown is for one standard.

Why choose this standard
Quick to set out. Stand it on the surface, mark through the base plate and fix: no core drilling or concreting in.
Works on steel or concrete. Bolt it to steel platforms and mezzanine decks, or anchor it to concrete slabs and wall tops.
Galvanised all over. Hot-dip galvanised mild steel stands up to rain and road salt with no painting.
Simple to build. Slide the tube rails through the balls, tighten the grub screws, and the run is done. No cutting fittings or welding on site.
Where it is used
Guard rails on flat roofs, plant platforms, mezzanine edges, loading docks, raised walkways, water treatment tanks, car park decks and the tops of retaining walls.
Specifications
| What you get | One flat base ball standard |
|---|---|
| Suits tube | 33.7mm outside diameter (25NB, 1 inch nominal bore) |
| Rails | 2 (top rail and knee rail) |
| Overall height | 1100mm |
| Ball centres | 500mm |
| Bottom of standard to lower ball centre | 600mm |
| Balls | 66mm diameter, drilled through, M8 grub screws |
| Base plate | 150 x 65 x 12mm, 2 fixing holes at 100mm centres |
| Material and finish | Mild steel, hot-dip galvanised |
| Weight | 3.5kg |
| Not included | Tube, end caps and fixings |
Setting the rail height
The top rail sits 1100mm above the underside of the base plate and the knee rail 600mm above it, so on a level surface the top rail is about 1100mm high. Check this against the guarding height your project needs.
How many do you need?
Allow one standard at each end and corner, with intermediate standards at no more than 2m centres. Each rail run needs two lengths of 33.7mm tube.
| Straight run | Standards | Tube (2 rails) |
|---|---|---|
| 4m | 3 | 8m |
| 6m | 4 | 12m |
| 10m | 6 | 20m |
| 20m | 11 | 40m |
Fitting
Set out the end standards on the surface, keeping the fixings a safe distance from any slab edge. Fix the ends first with anchors or bolts through every hole in the base plate, string a line between them and fix the rest to it. Feed the tube through the balls, leave a short overhang at each end, and tighten the M8 grub screws. Finish open tube ends with 33.7mm end caps.
Care
Galvanising needs no painting. Check the grub screws and fixings once a year, and treat any cut tube ends or damaged areas with a zinc-rich paint.
Other ball standards in the range
- Flat base standard for 33.7mm tube, 550mm centres
- Side palm standard for 33.7mm tube, 500mm centres
- Side palm standard for 33.7mm tube, 550mm centres
- Flat base standard for 42.4mm tube, 500mm centres
Frequently asked questions
Is the price for one standard?
Yes, one galvanised flat base ball standard.
What tube does it take?
33.7mm outside diameter tube, sold as 25NB or 1 inch nominal bore.
What is the difference between a flat base and a side palm?
A flat base bolts down onto the top surface. A side palm bolts to the vertical face of an edge, keeping the walkway clear. Use a flat base where there is room on top.
Are fixings included?
No. Choose bolts or anchors to suit the concrete, steel or masonry you are fixing to.
Ordering and delivery
Order online with Express UK Delivery. See the full range in Handrails & Brackets, or call 01744 520 110 or email sales@industrialsuppliesco.co.uk for project quantities.
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