Configuring JACK Chests of Drawers: How Many Drawers Suit Your Space?

Configuring a chest of drawers by the number of drawers not only defines storage volume, but also fundamentally determines the static load on the carcass and the choice of required drawer runners.

When planning carcass furniture in the JACK range, designers and fitters face the decision of how to divide the internal volume. Choosing between a few deep drawers or many shallow extensions directly impacts the hardware specification. The more drawers accommodated in a carcass, the lower the usable clear height per compartment becomes and the more precisely the front reveal gaps must be aligned. At the same time, the weight distribution across the side panels changes. This guide breaks down the technical parameters that must be considered when selecting the drawer grid.

Key Technical Buying Criteria for Drawer Systems

Before deciding on a specific layout, the physical limits of the carcass and hardware must be defined. A drawer system behaves like a vehicle chassis: if it is under-dimensioned for the intended dynamic load, running performance suffers and wear increases rapidly.

• Installation depth and runner length: The nominal length of the runner must match the internal clear carcass depth. For a chest with an external depth of 300 mm, subtracting the back panel and front often leaves an internal clear depth of around 260 mm to 270 mm. In this case, runners with a nominal length of 250 mm are used.
• Load capacity (dynamic load): Load rating is specified in kilograms (kg). For shallow drawer sides holding lightweight textiles, a roller runner with a 15 kg load capacity is sufficient. Deep drawers for heavy items require a ball-bearing runner or undermount runner rated for at least 30 kg to 45 kg.
• Extension type: A full extension runner pulls 100% out of the carcass, allowing access right to the rearmost corner. A single extension (partial extension) runner stops at roughly 75% of its nominal length due to its design.
• Soft-close vs. push-to-open: Systems with soft-close decelerate the drawer over the final centimetres and gently pull it shut. This requires a handle on the front. Handleless designs use push-to-open (also known as tip-on), where a mechanical ejector pushes the drawer open when the front is pressed. Both mechanisms are mechanically opposed and cannot be combined in standard fittings.

Overview of Drawer Grid Options: Mechanics and Statics

The JACK range offers various layouts, each placing specific demands on installation and hardware.

The 3- and 4-Drawer Grid: Maximum Depth

In models such as a classic chest with 3 drawers or a chest with 4 drawers, tall drawer fronts and deep drawer sides are created.

• Technical focus: The leverage torque when a drawer is fully extended and loaded is highest here.
• Hardware recommendation: Runners with high lateral stability are essential. For wide carcass dimensions (for example, 800 mm and above), synchronisation of the runners is sensible to prevent racking and jamming.
• Material: Under this load, the drawer base (often made of HDF) must be slotted into a groove or supported from below with crossbars.

The 6- and 8-Drawer Grid: Centre Partition Construction

Once more than five extensions are required, the carcass is usually divided vertically. Models such as the black chest with 6 drawers or the Sonoma oak chest with 8 drawers feature a load-bearing centre partition.

• Technical focus: Runners for both the left and right drawer rows must be mounted to the centre partition. With a 16 mm chipboard thickness, fixing screws (typically 5 mm Euro screws) must not collide at the exact same height.
• Installation: The System 32 (hole line drilling with 32 mm spacing) often allows a slight height offset between the left and right runners, or asymmetrical fixing positions on the runner are used.

The 10-Drawer Grid: High Hardware Density

A chest with 10 drawers (6+4) frequently combines different drawer side heights within a single piece of furniture.

• Technical focus: Tolerances for the front gap pattern are minimal here. When ten fronts are positioned above and alongside each other, every millimetre of deviation during runner installation accumulates.
• Hardware recommendation: Runners with integrated 3D front adjustment (height, side, tilt) are essential here to set a clean gap of exactly 2 mm to 3 mm between the fronts after assembly.

Decision Guide: Which Grid for Which Scenario?

The choice of drawer count follows strictly functional criteria.

• For storing heavy, bulky items: Choose a grid with 3 or 4 drawers. The construction tolerates higher point loads.
• When used as a classic linen cabinet: The 6-drawer grid offers the optimal compromise between compartment count and sufficient drawer height for folded textiles. A white chest with 6 drawers blends neutrally into bedrooms.
• For organising small parts, tools, or office supplies: The 8- or 10-drawer grid minimises unused vertical space above stored items. Shallow drawers prevent the need to stack items on top of one another.

Installation Guide: Fitting Drawer Runners in the Carcass

A structured approach is required for correct carcass assembly and hardware installation.

Required tools:

• Cordless drill/driver with PZ2 bit (Pozidriv)
• Tape measure or folding rule
• Carpenter's square

Step-by-step installation:

1. Prepare carcass panels: Fit the carcass runners to the side panels while they are lying flat, prior to assembling the carcass. This significantly simplifies access.
2. Positioning: Align the runners using the pre-drilled hole pattern in System 32. The front edge of the runner is usually set back by 2 mm from the carcass front edge to provide space for overlay fronts.
3. Fixing: Fasten the runners using Euro screws (Ø 5 mm) in the system holes. Alternatively, on smooth panels without pre-drilled holes, use chipboard screws (Ø 3.5 mm x 15 mm).
4. Drawer box assembly: Mount the corresponding hardware (runners, carriages, or front-locking clips) onto the drawer boxes.
5. Insertion: Stand the carcass upright, square it up using the back panel, and click or slide the drawers into the runners.

FAQ – Frequently Asked Technical Questions

What is the exact difference between full extension and partial extension? A full extension runner consists of three interlocking profiles (telescopic slide) and allows the drawer to travel 100% of its nominal length out of the carcass. A single extension (partial extension) runner usually consists of two profiles, leaving about a quarter of the drawer inside the carcass.

How do I align misaligned drawer fronts? Modern undermount runners feature small adjustment wheels or levers on the underside of the drawer. By rotating them, the front can be adjusted in height (typically +/- 2 mm) and often in tilt. With basic roller runners, the fixings on the front panel must be loosened and adjusted manually.

Can I use push-to-open and soft-close simultaneously? In standard fittings this is not possible, as the soft-close spring pulls the drawer inwards while the push-to-open pin pushes it outwards. Special, mechanically complex, and costly combination fittings do exist, but they are uncommon in standard furniture construction.

Which runner length do I need for a 350 mm carcass depth? The nominal length of the runner must be shorter than the clear internal depth. With an external depth of 350 mm, a 16 mm back panel, and a 16 mm front, approximately 318 mm of internal space remains. The appropriate nominal length for the runner in this case is 300 mm.

Suitable Categories for Room Planning

Matching hardware mechanics with carcass construction is vital for the durability of any storage unit. Depending on the required storage capacity and room size, different drawer grids can be integrated into the overall interior concept. For comprehensive storage solutions in living spaces, integration into a living room unit with ample storage space is recommended.

If specific visual accents in dark finishes are required, a black chest with 6 drawers is a classic option. For detailed organising tasks where a high number of drawers must operate smoothly in a compact footprint, a chest with 10 drawers (6+4) is the most technically sophisticated hardware solution.