Connector for 16x16 square balusters
Connector for 16x16mm square balusters - Quadrum range. Anodised aluminium. Straight junction between two 16x16mm square balusters end to end or on an intermediate post in line. Finishes: gloss black or gloss stainless steel. Compatible only with 16x16mm balusters in the WoodUp Quadrum range - not compatible with round Ø16mm balusters in the Ellipsis range. Minimal maintenance: anodised aluminium requires no treatment. Indoor and outdoor use. Sold individually. Screws included.
Connector for 16x16mm Square Rails - Straight Joint, Quadrum Range
This connector joins two sections of 16x16mm square rail from the Quadrum range in a straight line. Use it at each straight-line connection between modules: between a starter kit and an extension kit, or between two extension kits. Each joint requires 5 connectors (one per horizontal rail) and 1 Quadrum handrail connector to complete the continuous balustrade.
Available in gloss black and polished stainless-steel finish, it keeps the whole Quadrum installation looking consistent. For joints where the direction changes, replace this straight connector with Quadrum 16x16mm articulated rail joints. It is compatible exclusively with 16x16mm square rails in the Quadrum range and cannot be used with the Ø16mm round rails in the Ellipsis range.
Key specifications
| Specification | Value |
|---|---|
| Material | Anodised aluminium |
| Compatible rail cross-section | 16x16mm - Quadrum range |
| Use | Straight end-to-end joint between two square rails |
| Finishes | Gloss black / polished stainless-steel finish |
| Range | Quadrum only - not compatible with Ellipsis |
| Quantity per joint | 5 connectors per joint (1 per rail) |
| Sold | Individually |
Key points
- ✓ Straight joint - for in-line connections between Quadrum modules
- ✓ 16x16mm Quadrum - exact dimensions of WoodUp square rails
- ✓ 5 connectors per joint - one per rail, plus 1 handrail connector
- ✓ Matching finishes - gloss black or polished stainless-steel finish
- ✓ For corners: use the Quadrum 16x16mm articulated rail joint - an articulated joint instead of this straight connector
- ✓ Not compatible with Ellipsis - Ø16mm round rails have a different profile
Installation tips
Order 5 connectors for each straight joint between modules. Cut the rail ends square with a hacksaw and deburr the edges before inserting them. First insert all the rails into their connectors without tightening them, check the horizontal alignment along the full length of the installation, then tighten them gradually. For a virtually invisible joint, position the connectors at a post so the rail support conceals the assembly.
Care and protection
Clean with soapy water once a year. Check that the connectors are tight annually: thermal expansion outdoors can slightly loosen screwed joints. Rinse with fresh water in marine environments.
WoodUp tip
Before you buy: this connector is only for 16x16mm square rails in the QUADRUM range. Do not confuse them with Ø16mm round rails in the ELLIPSIS range. It joins rails in a straight line; use the articulated joint for changes of direction. Allow one connector per straight-line rail joint between each connected QUADRUM module. Tightening screws are included.
Frequently asked questions
How many rail connectors are needed to join 3 Quadrum modules?
3 modules (1 starter kit + 2 extension kits) have 2 joints, so you need 10 square rail connectors (5 per joint, Quadrum 16x16mm rail connector) and 2 Quadrum handrail connectors. Order these with the kits to avoid delaying installation.
Is this connector compatible with Ø16mm round rails from the Ellipsis range?
No. This connector is designed for the 16x16mm square rails in the Quadrum range. The Ø16mm round rails in the Ellipsis range have a round profile and require their own Ellipsis Ø16mm rail connector. Although the nominal dimensions may seem similar, the connectors have different internal sockets.
Can this connector be used to extend a rail that is too short?
Technically, yes: two rail sections can be joined end to end with this connector, even away from a joint between modules. For a stable result, position the connector at a post support rather than midway along an unsupported span. A rail joined midway along an unsupported span may flex slightly under sideways pressure.
What is the difference between the straight Quadrum 16x16mm rail connector and the articulated joint?
The Quadrum 16x16mm rail connector makes a straight-line joint (180°). The articulated joint allows a variable angle for changes of direction. Use the Quadrum 16x16mm rail connector for all in-line joints between modules, and the Quadrum 16x16mm articulated rail joint only for corners. They are not interchangeable.
Is this Quadrum rail connector suitable for outdoor use?
Yes. Anodised aluminium needs no additional treatment outdoors. The Quadrum range is suitable for indoor and outdoor use. In coastal areas, rinsing with clean water once a year maintains the anodised finish without any special effort. Straight connectors have no moving parts, so no mechanical maintenance is needed.
Complementary products
Quadrum articulated square rail joint - for angled joints
Quadrum 80x30mm horizontal handrail joint - handrail joint between modules
No questions yet.
Dispatch within 10 days when the product is in stock *.
* Except bespoke products
Dispatched within 6-8 weeks for personalised and made-to-measure products.
Payment in 1 or 3 instalments at no extra cost. Bank transfer, cheque or PayPal
Satisfied or refunded if returned within 14 calendar days (Sundays and public holidays included) following delivery.
8 other products in the same category:
No questions yet.





