Understanding USM Haller Dimensions: The Complete Grid System Guide

In brief: a nominal grid span is not a finished cabinet dimension or usable shelf opening. Record outside width, height and depth separately from the storage space and door or drawer movement you need. A familiar module name does not establish the size of every completed USM Haller or Klackjoy configuration.

Published by Klackjoy, an independent manufacturer, not USM. This planning guide uses our published component specification and links to the original manufacturer's system information; it is not a measurement of your retained furniture. Sources were checked on 16 October 2026 (Asia/Shanghai).

Three measurements to keep separate

For existing USM furniture, use its component identification, current manufacturer drawing and actual measurements. USM's system information and planning service belong to USM; Klackjoy's system specification describes our own components.

Standard spans are choices, not one mandatory cabinet

Klackjoy publishes nine nominal spans for independent selection across width, height and depth: 100, 150, 175, 250, 350, 395, 500, 595 and 750 mm. Its published connector is a 25 mm chrome-plated brass ball with an M8 internal thread. These are our compatible-component specifications, not a claim that every USM generation, fitting or current regional catalog is identical.

A 750 by 350 by 350 example is therefore an example, not the single required size of every module. Do not infer a shelf's cut dimensions or a front's fitting positions from the nominal span. Confirm the actual offered part and its mounting details.

Nominal width versus outside width

A recorded bare-frame example with a 750 mm axis span and 25 mm outer balls has a 775 mm outside extent along that axis. This explains the distinction; it is not a universal finished-furniture formula.

Do not add a ball allowance to every bay, or treat an unspecified “two by one” grid as a measured cabinet. The actual axis layout and outermost components must be known. Feet, castors, fronts, protruding fittings and the assembled drawing still need their own check. This guide supplies no replacement overall-size table for unspecified multi-bay layouts.

Height including levelling feet or castors

Measure from the finished floor to the highest installed point, with the actual base and levelling setting. A frame's vertical nominal spans do not include an unspecified foot adjustment or castor assembly.

Record floor unevenness, the available ceiling or worktop height, and any manufacturer-required fixing. Do not infer base height, brake performance or stability from a castor flag in a preview. A furniture dimension is not an anchoring or load certificate.

Depth: outside, usable and operational

Record the rear-most to front-most installed extent separately from usable internal depth. Panels, hinges, drawer runners, front positions, connectors and stored items can reduce the clear space you actually have.

For equipment, include the manufacturer's own ventilation and connection requirements, plug projection, cable routing and service access. A nominal depth does not guarantee that a record sleeve, appliance or cable bend fits. Measure the actual item and opening rather than borrowing a generic clearance number.

Door and drawer clearance is a separate envelope

Check the moving front at its intended opening, including handles, adjacent furniture, skirting and the route people use. A cabinet can fit against a wall while its door or drawer cannot operate there.

Use the front and fitting checklist and narrow-space guide. This guide does not prescribe one minimum gap for every front, hinge or passage.

Hallways and alcoves: fix the measurement plane first

For a hallway or alcove, record the narrowest usable width and the measurement plane before comparing a cabinet. Keep nominal spans, the bare-frame envelope, the complete installed projection and the usable opening separate. In a specified teaching frame with 25 mm outer connector geometry, the outside extent along an axis is the sum of its center-to-center spans plus one connector diameter, not one allowance per bay. This is not a finished-cabinet formula. Check the actual fronts, handles, base, rear gap and required installation space, then test both closed and fully open states against the room and the applicable passage requirements.

Two slips are common. A 750 mm plus 500 mm bare frame is 1,275 mm wide outside, not the 1,250 mm sum of its spans and not 1,300 mm from a ball allowance per bay. And if the 1,270 mm you recorded was already measured between the skirting boards, do not subtract the skirting again. A geometric screen can rule a layout out; passing it does not confirm that the finished cabinet can be installed.

Existing furniture and ordering record

Record the manufacturer and generation where known, node and retained fittings, tube or axis dimensions as defined by the supplier, finished outside measurements, front dimensions and opening direction. State which parts stay and which will change. A photograph helps identification but is not a dimensioned drawing.

Use the configurator to plan a Klackjoy layout, then compare its selected configuration and component list with the real room and supplier's confirmed dimensions. Review the base, fronts, delivery route and installation requirements before payment. A matching thread or nominal span alone does not establish complete mixed-assembly compatibility.

For the Chinese explanation of the same measurement task, see 网格、公称尺寸与成柜尺寸. This is a language route, not an additional furniture system or new independent intent.

Frequently Asked Questions

What are the standard USM Haller dimensions?

Do not treat a 750 by 350 by 350 example as the only finished cabinet size. Identify the USM component drawing for an existing unit. Klackjoy separately publishes nine nominal spans—100, 150, 175, 250, 350, 395, 500, 595 and 750 mm—for independent axis selection; these are not cut-panel or finished-cabinet dimensions.

How big is a USM Haller node (ball connector)?

Klackjoy's published compatible-component specification is a 25 mm chrome-plated brass ball with an M8 internal thread. For retained USM furniture, identify the actual node, generation and connection details using its documentation and supplier. Diameter or thread alone does not confirm every fitting or a complete mixed assembly.

How do I calculate the actual overall size of a USM Haller unit?

Separate the axis layout from the installed outermost dimensions. In a bare-frame example, a 750 mm axis span with 25 mm outer balls has a 775 mm outside extent along that axis. Check the actual complete drawing, base, fronts and protrusions; do not apply that example as a universal finished-cabinet formula.

How does the USM Haller grid system work for planning?

Use the selected axis spans to plan the frame, then separately verify outside width, installed height including feet or castors, usable depth and the door or drawer movement envelope. Measure the room and stored items. A grid selection does not provide an appliance clearance, load rating or anchoring specification.

Is Klackjoy dimensionally compatible with USM Haller?

Klackjoy publishes compatible component dimensions, but an actual extension needs identification of the retained system, generation, tubes, connectors, fronts and fittings. Obtain confirmation for the proposed combination. Shared nominal spans do not establish universal interchangeability, finish matching or load capacity.