Which materials are suitable for furniture construction in the medical sector to ensure decontamination capability?

For sterile environments, our production specialists primarily rely on stainless steel furniture (material 1.4301), as the austenitic structure offers a non-porous surface that remains chemically resistant to aggressive disinfectants. In contrast to wood-based materials, metal prevents the colonization of microorganisms as the surface texture does not allow capillary action, which minimizes the risk of cross-contamination in laboratories.

What are the fire protection requirements for custom-made furniture in hospital escape routes?

In sensitive areas, we only manufacture furniture in accordance with fire protection class A1 (non-combustible) by using metallic materials without flammable fillers. A breach of DIN EN 14073 leads to unacceptable smoke development in the event of a fire, which hinders evacuation and results in liability for the operator; conventional HPL coatings are therefore not suitable for these use cases.

What are the no-go criteria for hinge systems in automated laboratory environments?

The use of hinges without an integrated damping element leads to mechanical shocks during fast closing cycles, which endanger sensitive chemical samples in laboratory automation. We therefore only use damped heavy-duty hinges to prevent the transmission of vibrations to the housing, which would otherwise massively reduce the service life of the internal actuators.

How can electrical systems be integrated into metal furniture while maintaining patient safety?

We integrate an earthed cable duct into our design and use insulated grommets to prevent a potential short circuit in the housing. A lack of potential equalization in metallic systems carries the risk of electric shocks, which is why Karl Naumann GmbH subjects every unit to a protective conductor test in accordance with DGUV V3 before it leaves the factory.

What role does RoHS and REACH compliance play in furniture series production for hospitals?

We validate in our QA that all powder coatings are free of chromium(VI) and other hazardous substances in order to prevent the outgassing of toxic substances in patient rooms. The use of non-certified coatings leads to the immediate loss of marketability of the furniture series production and poses a massive health risk for immunocompromised persons.

How is dimensional accuracy ensured in furniture series production for medical cabinet wall systems?

By using CNC-controlled bending centers, our employees achieve tolerances of ±0.5 mm over the entire length of the carcass. Any deviation beyond this limit leads to gaping joints during the on-site assembly of made-to-measure built-in furniture, which act as dirt traps and thus make the hygienic validation of the entire system impossible.

Which wall thicknesses are ideal for design-oriented individual pieces of furniture with telescopic pull-outs?

For the upmarket private sector, our specialists use 2.0 mm thick aluminum for the carcasses in order to achieve high torsional rigidity with a low dead weight. A wall thickness of less than 1.5 mm leads to warping of the housing when the drawers are fully loaded, which means that the magnetic catch no longer closes flush and the aesthetics of the individual piece are permanently impaired.

How does the choice of anodizing over powder coating affect the feel and durability?

With anodizing, the surface is chemically converted into a hard oxide layer, which, in contrast to powder coating, retains a metallic feel and is absolutely scratch-resistant. However, we recommend a high-quality powder coating for edges subject to heavy mechanical stress in the living area, as anodized coatings tend to crack when subjected to hard knocks, which destroys the flawless appearance.

What are the no-go criteria for connection technology in modular furniture systems?

The use of simple self-tapping screws for repeatable installations is unsuitable, as the threads in the material wear out with repeated use. Instead, Karl Naumann GmbH relies on high-quality press-fit fasteners with metric threads to ensure the long-term stability of the connections even after repeated relocations.

How is the ergonomics of individual office furniture for the home office validated?

All our technicians are guided by DIN EN 1335, whereby we mechanically ensure height adjustability via precise telescopic pull-outs. Incorrect design of the working height leads to chronic postural deformities; we eliminate this risk as early as the design phase by means of customized CAD adaptation.

What are the advantages of custom-made furniture over mass-produced goods?

Individual furniture construction enables the perfect utilization of existing niches by adapting the carcasses to the architecture with mm precision. Our project engineers ensure that even complex functions such as concealed safes or integrated cable guides are seamlessly integrated into the designer furniture thanks to the high level of vertical integration, which is technically impossible to achieve with standard furniture.

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Furniture construction Automotive industry

Furniture construction Electrical industry

Furniture construction Medical technology

Furniture construction Ventilation and air conditioning technology

Customized furniture construction - single piece to series without "joinery roulette"

If a project fails, it's not because of the wood - but because of the dimensional chains, installation situation, hardware loads, assembly access and approval processes. Customized furniture according to customer requirements must be treated like a technical product: with CTQ, versioning and reproducible processes.

At Karl Naumann GmbH, we implement customized furniture construction - from individual items to repeatable series, including planning, production, delivery and assembly.

100%

Customized production

Individual piece or series - according to your ideas

Each piece of furniture is created individually - from the initial design to the choice of materials and on-time installation. A perfect fit for your room and your style.

Single piece
Small series
Built-in furniture

8+

Wood types & materials

Solid wood, veneer, chipboard & more

Beech, maple, ash, oak, Swiss stone pine, walnut and other materials - we can advise you on choosing the right material for your dream furniture.

Solid wood
veneer panels
Decorative chipboard

3^rd

Generation family business

Reliability with a personal handshake

As an owner-managed joinery, we personally stand for quality and reliability - short decision-making processes, individual advice on site, long-term partnerships.

Owner-managed
Personal advice
Bear stone

75+

Years of wood & furniture construction

Joinery expertise that you can see

Over 75 years of experience in wood and furniture processing. Private customers and businesses entrust us with their projects - from the initial idea to the finished installation.

Since 1948
Private & commercial
Joinery

Furniture construction according to
customer requirements - from
Single piece to series production with predictable repeat accuracy

Our in-house carpenters and master carpenters view bespoke furniture as a functional assembly: usage, load cases, surface requirements, transportation and assembly conditions are mapped in terms of design. The result is not "beautiful furniture", but an approved system with documented specifications - particularly relevant for commercial, contract and series production logic.

Technical added value -
where furniture becomes a project risk

CTQ-driven design instead of gut feeling
Gap dimensions, flatness, alignment, joint patterns, fitting function, installation dimensions.
Series production capability from sample release
Parts lists, variant logic, reproducible processes, re-order capability.
Integrated assembly and logistics design
Dismantlability, transport routes, construction site logistics, protection of existing surfaces.
Technology integration without improvisation
LED, sockets/USB, cable management, equipment compartments, ventilation according to specifications.

Typical areas of application for customized furniture construction

Custom-made furniture according to customer requirements is realized for, among others:

Private: built-in furniture, wall units, wardrobes, niche solutions, sloping ceilings, sideboards, beds
Kitchen: carcasses, fronts, worktop solutions, kitchen islands
Commercial/property: reception counters, counter systems, shelving systems, display cabinets, POS furniture
Office: desks, conference tables, acoustic solutions, storage modules
Doors/partition walls: sliding doors, room dividers, acoustic panels
Special construction: Staircase furniture, media/technology integration, special fittings

Send request

Start technical inquiry

Request measurement/plan check

Designs and variants of made-to-measure furniture

By design

free-standing / built-in
modular / demountable
transport-optimized / flat packable (series logistics)

By use & environment

Living room
Wet room
Outdoor area (roofed)
Highly frequented object areas
School and kindergarten rooms

Object requirements

Fire protection (depending on the property)
Hygiene (cleanability, joint/edge concept)
Acoustics (absorbers, panels, systems)
Theft/vandalism protection (depending on use)

Project start with drawing & quantities

We will get in touch with you.

Scope of services -
from clarification of requirements to acceptance

Consultation & clarification of requirements (usage scenario, functional requirements)
On-site measurement or plan check (DWG/PDF)
Design + visualization (sketch/rendering) + final approval
Production: Cutting, edges, drilling patterns, milling, fittings, surfaces
Delivery & assembly, optional dismantling/disposal of stock
Series service: sample approval, parts lists, variant management, repeat orders

Request a quote incl. scope of services

Have series/object service checked

Engineering, Engineering & Technology

Construction & joining techniques

doweling, laminating
screwing, eccentric-based
gluing
Can be dismantled (transport/service/series)

Fittings & systems (typical)

Pull-outs: Partial/full extension, load capacity per load case (e.g. 30-70kg)
Hinges: Soft-close, clip technology, opening angle 110-155°
Handles: bar handle, shell handle, push-to-open, handleless profiles
Adjustable feet/plinth systems: Height compensation, easy to install

Technology integration

LED lighting
Sockets/USB modules
Cable management & cable ducts
Device integration (e.g. router, media technology, coffee modules)
Ventilation/hole patterns for heat dissipation in technical compartments

CTQ - critical quality characteristics

Front gap dimensions, joint pattern, alignment/flatness
Stability with high usage
Edge quality without tears
Permanently functioning fittings (soft-close, pull-outs, doors)

Materials and surface options

Wood-based materials

MDF, multiplex, plywood, CDF
Chipboard P2/P3
Solid wood
Decorative panels (e.g. oak/beech/ash/walnut)

Surfaces

Veneer
Lacquer (matt/silk matt/glossy) / high gloss
Oil/wax
HPL, CPL, melamine
Linoleum, natural rubber

Metal/glass components

Steel/stainless steel/aluminum elements
Glass (clear/matt), mirror
Perforated sheet (design/ventilation)

Preferred standards

Object: HPL/CPL, robust abrasion- and cleaning-resistant systems
Design surfaces: Lacquer or veneer
Budget: robust melamine/decor surfaces

Request test plan / initial sample

Tell us what is critical - we define test and acceptance criteria.

Quality, testing & documentation

Visible surface quality: color tone, gloss level, grain pattern, uniformity (according to sample/approval)
Edges: defined visible/joint edges, radii/profile edges
Function test: doors/drawer run, soft-close, load-bearing capacity
Dimensional check: critical installation and connection dimensions, joints
Documentation (object/series): Parts lists, hardware specification, surface samples, release status
Series: article numbers, variant lists, packaging instructions, assembly instructions

Have complete production calculated

You talk to people who understand manufacturing - not just sales!

Request - discreet, fast, resilient

So that we can respond quickly and accurately:

Contact details:

Telephone

+49 35054 2912-0

e-mail

[email protected]

Address

ST Bärenstein
Müglitztalstraße 6
01773 Altenberg

Business hours

Monday - Thursday: 6:15 a.m. - 4:00 p.m.
Friday: 6:15 a.m. - 2:00 p.m.
Saturday - Sunday: Closed

Contact form:

Project management - approvals, changes, schedule reliability

Procedure:
Clarification of requirements → Measurement/plan check → Design → Offer → Approval → Production → Delivery → Assembly → Acceptance

Changes after approval:

Change via versioned status

Effects on costs/dates transparent

Trade/object:

Scheduling window, construction management interface, assembly planning

Delivery times, capacities & logistics

Private: typically 4-10 weeks from release (depending on project)
Commercial/series: according to project plan, quantity, material, assembly window
Delivery: assembled / partially disassembled / flat packed
Packaging: edge protection, film, reusable (commercial/series), labeled per item
Construction site logistics: scheduling, floor/lift/staircase situation taken into account

Service, maintenance & operation

Reorders and extensions for material/optics availability
Spare parts for fittings/wear parts (depending on model)
Object: service windows, replacement fronts, refresh concepts
High usage: robust fittings, resilient pull-outs, resistant surfaces taken into account in the design

Product overview - Made-to-measure furniture

Product	Use	Construction	Surface	Technology option	Can be reordered
Built-in wardrobe system	Private/Object	Installation, modular	Veneer/varnish/HPL	LED/cable	Yes
Reception desk	Trade	robust, assembly-optimized	HPL/CPL	Sockets/USB	Yes
Conference table	Office	stabilized, demountable	Lacquer/veneer	Cable duct	Yes
POS shelving system	Shopfitting	modular, transport-optimized	HPL/Melamine	Lighting	Yes

Customized furniture construction according to customer requirements

Custom-made furniture construction - from individual items to series production according to customer requirements - includes constructively designed carcass and support structures, hardware-integrated functional modules as well as assembly and logistics-optimized assemblies. In the industrial and commercial environment, the focus is on repeat accuracy, defined CTQ features and variant control; in the private sector, the installation situation, material mix and usage profile dominate. Karl Naumann GmbH implements such projects with approved design statuses, load-oriented hardware specifications and parts list logic ready for series production.

Types and variants of made-to-measure furniture construction - individual pieces to series according to customer requirements

Carcase-based made-to-measure furniture (load-bearing carcase structure)

Functional principle: load-bearing side, base and top structure with defined joining techniques (screwed, eccentric-based, glued), designed for payload and hardware integration.

Demarcation: Primary function is load-bearing capacity and geometric stability; surface appearance is secondary.

Typical use: Cabinet systems, storage modules, sideboards, technical cabinets, modular series furniture.

Technical parameters - Carcase-based made-to-measure furniture

Front and façade systems (visually & functionally defined)

Functional principle: interchangeable front modules with defined joint pattern, opening mechanism and surface structure; structurally separate from the carcase.

Differentiation: Focus on look, feel and operation; load-bearing function is in the carcase.

Typical use: Kitchen, office and contract fronts, design-oriented series.

Technical parameters - front systems

Functionally integrated furniture (technology/media integration)

Functional principle: Integration of LED, sockets/USB, cable ducts, ventilation and inspection access points in the furniture structure; thermal and service-related boundary conditions are taken into account in the design.

Differentiation: Furniture as a technology carrier with defined serviceability.

Typical use: Media furniture, workstations, reception desks, equipment modules.

Technical parameters - Functionally integrated furniture

Load-optimized contract furniture (high-frequency use)

Functional principle: reinforced edges, heavy-duty fittings, abrasion-resistant surfaces; designed for high usage cycles.

Differentiation: designed for continuous use instead of design priority.

Typical use: retail, medical practice, education, catering, reception.

Technical parameters - contract furniture

Modularized series furniture with variant logic

Functional principle: standardized basic modules with configurable dimensions/fronts/surfaces; article number and variant control for series production.

Differentiation: Reproducibility and logistics dominate over individual customization.

Typical use: Store furnishings, office rollouts, recurring commercial projects.

Technical parameters - standard furniture

Demountable and transport-optimized constructions

Functional principle: Structurally separable assemblies with easy-to-assemble connectors; minimized packing dimensions for logistics and tight access.

Delimitation: Logistics and assembly optimization as a primary requirement.

Typical use: inner-city projects, series with shipping logic, international rollouts.

Technical parameters - Demountable furniture

Mixed material furniture (wood + metal + glass)

Functional principle: Combination of wood-based materials with metal frames or glass surfaces; thermal expansion, jointing and edge connections are taken into account in the design.

Delimitation: Interface and stress management are decisive.

Typical use: Conference tables, counters, design modules, display cabinets.

Technical parameters - material mix

One-off with special design

Functional principle: individual geometry without grid binding; design is project-related with specific load and installation logic.

Limitation: no series restriction, but complete documentation for later reproducibility.

Typical use: complex installation situations, special shapes, representative individual objects.

Technical parameters - single piece

Certified according to DIN EN ISO 9001
Harmonized with IATF 16949

From Bärenstein near Glashütte into the world -

Precision in metal and wood since 1947.

+ 49 (0) 3 5 054 29 12-0

We will be happy to contact you.

Send request