Fitting Out a Corner Wardrobe: Internal Systems Compatible with IKEA PAX Solutions

Equipping a corner wardrobe requires hardware and internal systems that are precisely matched to the 32 mm hole pattern and the specific carcass depths of standardised modular furniture systems.

Anyone planning a corner wardrobe or looking to expand an existing modular system such as IKEA PAX faces a technical challenge: the corner is often dead space. Standard fixed shelves waste a massive amount of storage capacity here. To make full use of the entire depth and height of the carcass, choosing the right mechanical components is essential. This guide is aimed at fitters and experienced DIYers looking to retrofit wardrobe carcasses with precisely fitting fittings, runners, and hinges.

Key Buying Criteria for Wardrobe Internal Systems

Before installing rails or lifts, the technical parameters of the carcass must be accurately recorded. Standardised wardrobes rely on fixed dimensions that must be strictly observed when selecting hardware.

Hole Spacing and System 32

Most modular wardrobes are based on System 32. This means the vertical centre-to-centre distance of the pre-drilled holes in the side panels is exactly 32 mm. The hole diameter is usually 5 mm. The standard distance from the front row of holes to the front edge of the carcass is 37 mm. Compatible wardrobe accessories must feature screw positions precisely tailored to this grid to ensure installation without drilling additional holes into the timber.

Carcass Depth and Installation Dimensions

The usable internal depth dictates the length of the drawer runners. A standard carcass often has an external depth of 600 mm and an internal depth of around 580 mm. However, if working within a narrower space—such as a wardrobe measuring 500 mm or only 350 mm deep—standard hanging rails will collide with the doors. In these scenarios, runner lengths of 250 mm to 450 mm must be selected.

Load Capacity and Leverage

Clothing builds up significant weight within a compact space. A simple partial-extension runner with a 15 kg load limit is insufficient for heavy winter coats. In this case, heavy-duty runners with a load capacity of 30 kg to 45 kg are required. For pull-down wardrobe rails, the force of the integrated gas strut is specified in Newtons (N). The nominal rating (for example 120 N) must match the expected weight of the clothes; otherwise, the lift will drop down uncontrolled or fail to pull down when empty.

Hinge Geometry on Corner Doors

The door of a corner unit strictly requires a wide-angle hinge. While standard doors open at 95° or 110°, a corner door requires an opening angle of 155° or 165° so that internal drawers do not scrape against the door edge when pulled out. Furthermore, pay attention to the mounting type: depending on the corner post construction, a full overlay or an inset hinge is needed. The cup diameter drilled into the door is usually 35 mm.

Overview of Hardware Types and Options

To utilise every millimetre of a corner connection in a large wardrobe—such as a run spanning 3 or 4 metres in width—various hardware options are available.

• Corner Carousel Fittings: A corner unit carousel uses a central metal spindle on which 3/4 circle shelves or hanging rails rotate. Fitting requires precise alignment of the upper and lower mounting points.
• Drawer Systems: Complete drawer systems are ideal for retrofitting. A full-extension runner allows 100 percent access right into the back corner of the drawer, while an undermount runner conceals the mechanism invisibly beneath the timber base.
• Pull-Down Wardrobe Rails: A pivoting rail assembly mounted in the upper section. Ideal when the wardrobe height exceeds 180 cm or when floor-to-ceiling carcasses (such as 236 cm) are used.
• Front-Facing Pull-Out Rails (Telescopic Rails): Specifically for shallow-depth wardrobes. Garments hang front-to-back rather than side-by-side.
• Lighting Profiles: Recessed or surface-mounted aluminium profiles for furniture LED accessories, activated via infrared door contact switches.

Which System for Which Application?

Selecting the correct component follows strict logic based on room dimensions and intended use.

When the corner carcass has a standard depth of 580 mm: The combination of two fixed, superimposed hanging rails provides the most rigid solution. The lower section retains space for a mobile drawer unit or fixed shelves.

When the wardrobe has a shallow depth (e.g. 350 mm to 500 mm): Telescopic pull-out hanging rails must be screwed beneath the shelves. Standard clothes hangers with a width of approx. 450 mm would otherwise prevent the doors from closing. Alternatively, custom sliding wardrobe doors can save space in front of the wardrobe.

When drawers are planned in the lower corner area: The runner must be fitted with spacer blocks. A well-planned wardrobe interior functions like precision clockwork—runners and hinges must never obstruct each other. Without a spacer block, the drawer side will inevitably collide with the door hinge when pulled out.

When moving heavy loads: Always select a steel ball bearing runner instead of a basic plastic roller runner. Ball bearing runners provide superior lateral stability and cope significantly better with dynamic loads.

Installation Notes for Internal Systems

Precise workmanship is essential for the correct installation of retrofitted internal systems.

Required Tools:

• Cordless drill/driver with torque control
• Bit set (usually PZ 2 for chipboard screws or TX 15/20)
• Spirit level or cross-line laser
• Tape measure and try square
• Bradawl or 5 mm wood drill bit with depth stop

Step-by-Step Installation of a Drawer Runner:

1. Define the Height: Determine the desired height within the System 32 grid.
2. Separate the Runner: Release the internal disconnect lever on telescopic runners to separate the carcass member from the drawer member.
3. Fixing into Position: Position the carcass runner. Use dedicated Euro screws (typically 6.3 x 13 mm) for the 5 mm holes in the drilling grid. These provide substantially higher pull-out strength in chipboard than standard wood screws.
4. Check Alignment: Verify the level alignment of both runners before fully tightening the screws.

FAQ – Frequently Asked Questions About Wardrobe Fittings

Do all standard runners fit an IKEA PAX wardrobe? No. Runners must be compatible with System 32 and the specific internal width of the carcass. Furthermore, the runner length (e.g. 550 mm) must be shorter than the internal depth of the unit (approx. 580 mm).

Which hinge do I need for a corner wardrobe door? For unobstructed access to a corner wardrobe, a wide-angle hinge with an opening angle of 155° or 165° is strictly required. Standard 110° concealed hinges obstruct the path of internal pull-outs.

What is the difference between soft-close and push-to-open? Soft-close is a damper mechanism that decelerates the component (door or drawer) over the final few centimetres and pulls it shut quietly. Push-to-open (or tip-on) is an ejection mechanism designed for handleless fronts. Both mechanisms are mechanically incompatible within the same runner.

How do I prevent internal drawers from rubbing against the open door? Fit spacer strips between the internal carcass wall and the drawer runner to bridge the hinge protrusion. Alternatively, use inset hinges that pivot the door completely clear of the internal opening.

Can pull-down wardrobe rails be mounted to any side panel? The side panels must be made of sufficiently robust material (at least 16 mm, ideally 18 mm chipboard). For very wide wardrobes (e.g. 100 cm or 120 cm internal width), the lifting force of the gas dampers must be high enough to lift the weight of the long rail and its garments (typically 100 N to 150 N).