Key Clamp Adjustable Long Tee 30-45° for 42.4mm Tube, Stair Rail Fitting, Galvanised

A long barrelled tee for 42.4mm tube, adjustable from 30 to 45 degrees, for bringing a vertical upright into a sloping rail. The rail runs along the barrel and the upright enters through an oval opening in its underside, which allows the angle between them to be set anywhere in that range. Three hex socket grub screws lock the joint without welding. The fitting suits 42.4mm outside diameter tube, sold as 32mm nominal bore, and is galvanised malleable cast iron. The price shown is for one fitting, with a minimum order of 5.

Why an adjustable long tee works

Set the angle on site. A fixed fitting only works at one pitch. This one can be set between 30 and 45 degrees, so flights of different pitch within that range can use the same fitting.

A long barrel for a good grip on the rail. The barrel gives the rail more length to bear on than a short tee, with a grub screw at each end and one in the middle for the upright.

No hot work. Slide the tube in, set the angle and tighten the screws. There is no welding, no fire permit to arrange and no galvanising to repair on site.

In short: one fitting for a range of pitches, with a long grip on the rail and no welding.

Where it is used

Connecting an angled handrail or guard rail to a vertical upright on stairs and sloping runs. It is at its best where the pitch is known but not standard, or where the same fitting needs to cover several flights at slightly different angles. Check the pitch you need before ordering, because outside 30 to 45 degrees this fitting will not sit true.

Specifications

Choosing the right size and type

Measure the outside of your tube with a caliper rather than relying on a nominal bore size on a delivery note. This fitting is for tube that measures 42.4mm across, sold as 32mm nominal bore. The bore is cast to that size, so a smaller or larger tube will not grip properly.

See the full range of galvanised key clamp fittings.

Fitting and care

Cut the tube ends square and remove any burr. Slide the rail along the barrel, bring the upright into the oval opening and set the angle before anything goes tight. Tighten the grub screws evenly with a hex key until they bite firmly on the tube, and do not overdrive them.

No load rating is published for this line. If the frame has to meet a design loading, have it assessed by a competent person before it goes into use.

Check the grub screws during routine inspections of the frame, especially where it is exposed to vibration. Galvanising needs no routine care in normal conditions, and any cut tube ends or damaged areas can be touched up with a zinc-rich paint.

Frequently asked questions

Ordering and delivery

Order 5 or more online, with Express UK Delivery to your site and same-day dispatch on orders before 2pm, Monday to Friday. For a larger job, call 01744 520 110 or email sales@industrialsuppliesco.co.uk and we will confirm availability and delivery before you order.