Fittings in Commercial Construction: Digital Locking Systems for Doors and Handles

Digital locking systems are revolutionizing the management and use of buildings. Access rights can be centrally controlled, flexibly adjusted, and assigned to different user groups. Digital access solutions combine the centralized management of access permissions with mechanical door technology. Housing companies, care facilities, and commercial real estate properties benefit from a drastic reduction in traditional key management. But digitalization doesn’t start with the software—it starts at the Door. 

The Door as the Interface Between the Digital and the Mechanical

Digital locking systems, too, are based on physical components that are subjected to daily wear and tear. The door leaves, lock, fittings, and locking mechanism must be designed to work together and meet the requirements of the specific application. An entrance door in an apartment building requires different characteristics than an office door. In care facilities, additional requirements such as ease of use and high frequency of use come into play. Anyone equipping existing buildings with digital access systems such as KIWI should therefore incorporate the mechanical properties of the doors into the planning process at an early stage. In the housing sector in particular, there is a need for solutions that can be integrated into existing building structures and allow for flexible management of different access permissions.

Mechanics remain crucial—even for digital Doors

Digital locking systems replace the traditional key with digital access permissions. However, the mechanical processes at the door remain unchanged: The handle is pressed, the latchbolt moves, and the door leaf opens and closes. Fittings and fasteners must absorb the resulting forces. The more frequently a door is used, the greater the stress on its components. These mechanical requirements are often overlooked in digitization projects, as the initial focus is on technical issues such as access permissions and user groups. However, a door used daily by only a few people requires different fittings than a heavily trafficked building entrance door. The intensity of use should therefore be taken into account as early as the initial assessment phase. 

Requirements vary depending on the type of building

There is no one-size-fits-all hardware solution. The key factors are how often the door is used, the user groups, and the door's function within the building. 


Multifamily Buildings: A Variety of Doors and Functions

In apartment buildings, different types of doors coexist. The main entrance is used by residents, visitors, and service providers, while basement doors or common areas have different requirements. Apartment doors protect private spaces. Digital locking systems can centrally manage these access points, but mechanically, the doors remain different. Main entrances must be particularly durable and reliable, while apartment doors must also provide protection and privacy. A rollout should therefore be planned not only based on the number of doors, but also on their type and use. 

Office Buildings: High Foot Traffic and Changing Occupants

In office buildings, employees require regular access, while visitors, cleaning staff, and service providers are often granted only temporary access permissions. Digital locking systems are ideal for managing these varying requirements. At the same time, mechanical stress increases: entry doors and connecting doors are used frequently, especially in coworking spaces or high-traffic office areas. Here, the mounting, fastening, and Material of the Fittings must be designed to withstand intensive use. 

Care Facilities: Usability Must Remain a Priority

In long-term care facilities, residents, caregivers, family members, and external service providers all come together. Digital locking systems can organize complex access rights, but the doors themselves must meet high standards. Fittings must be sturdy, easy to use, and Barrier-free. Fire and smoke protection also play a role. This highlights how important it is to coordinate digital access planning with mechanical hardware planning. 

Technical Standards for Fittings

The intensity of use for fittings is not a subjective characteristic. Standards such as DIN EN 1906 define usage categories and test procedures, for example, for long-term performance, safety, and corrosion resistance. Designers should therefore select fittings not only based on price or design, but also on their technical suitability for the specific application. The HAFI product line, for example, includes fittings that have been tested for high cycle counts—a key difference from fittings selection for private interior design projects. 

Functional Doors: A Coordinated System

Fire- and smoke-rated doors, as well as escape routes, require systematic planning. The door leaf, frame, lock, and fittings must function as a single unit. Changes to any one component can jeopardize certification. In digitization projects, therefore, the door’s function should be verified first before selecting digital and mechanical components. 

A Status Assessment as a Basis

A thorough assessment is essential before a rollout. The following questions should be made clear: 

  • What is the door’s function? 
  • Who uses it and how often? 
  • What type of lock and Fitting is currently installed? 
  • Is it a fire door, smoke-proof door, or emergency exit door? 
  • What are the requirements for burglary resistance or Barrier-free accessibility? 
  • What is the condition of the lock, hinges, and Fittings? 
  • Which digital locking component should be used? 

This analysis forms the basis for structured planning. Even for solutions that are easy to retrofit, it does not replace an inspection of the Door, but rather makes digitization economically viable. 


GRIFFWERK's design-oriented fittings combine thoughtful functionality with clear, high-quality lines and add stylish accents to modern living spaces.

Choice of Materials: Durability and Aesthetics

A door handle in commercial buildings must not only withstand frequent use but also resist external factors such as moisture, cleaning agents, and temperature fluctuations. Stainless steel is often the first choice because it is durable and easy to maintain. However, depending on the location, finish and certified properties also play a role. For example, in healthcare facilities, surfaces that are easy to clean and high visibility of the door handle can be particularly important. In heavily trafficked public buildings, on the other hand, high durability is often the top priority. Design and function are not mutually exclusive—rather, the material, finish, and design must be tailored to the specific application.

Combining Design and Function

Digital locking systems don’t have to look out of place. Especially in high-end residential and office buildings, it should blend harmoniously into the architecture. HAFI offers technical solutions for commercial properties, while GRIFFWERK develops design-oriented Fittings for residential spaces. Together, they enable digital locking systems that are both functional and aesthetically pleasing. 

Planning Steps for a Structured Rollout 

  1. Assess usage scenarios: Analyze door types and user groups. 
  2. Review requirements: Document locks, Fittings, and security features. 
  3. Select a digital solution: Determine the appropriate KIWI components. 
  4. Verify fittings: Ensure mechanical suitability. 
  5. Coordinate the design: Harmonize the door leaf, frame, and handles. 
  6. Plan maintenance: Ensure accessibility for future maintenance. 

The Smart Door as a Complete System

This is where different areas of expertise converge. HAFI focuses heavily on the technical requirements of commercial projects. GRIFFWERK specializes in high-quality, design-oriented hardware solutions for private residences. 

Both perspectives are becoming increasingly important, especially in high-end residential construction. A digital locking system must function reliably while also blending seamlessly into the Door’s design.

KIWI, HAFI, and GRIFFWERK combine digital, mechanical, and design expertise to create doors that not only control access but also perform exceptionally well in everyday use.