The interlocking system adopted by the Lock-BUILD Group was initially developed at the University of Hawaii, USA. Later development took place at the Asian Institute of Technology, Bangkok, Thailand. During these periods, totalling some twenty years, the system evolved into a fully fledged international class building system with extensive construction projects throughout Southeast Asia. The design and technology of the interlocking system also evolved from simple one-story rural cottages to complex multi-story urban developments. The Lock-BUILD Group was founded in 1992 and employs architects, engineers, builders and planners, some of whom helped to create and develop the original interlocking system. The company was created to efficiently deliver Lock-BUILD projects to clients in Thailand.


The Lock-BUILD Group is capable of servicing a wide spectrum of projects: from a singlefamily residence to large scale urban developments and from a chemical plant factory to a greenhouse. Many construction projects are also be Turnkey operations. The following services are provided using either the Lock-BUILD system or conventional construction methods.

  • Design/Build of Lock-BUILD and conventional construction.
  • Professional services include Architectural design, Project feasibility studies, Environmental planning, Quantity surveys and Cost Estimating, and Mechanical and Structural Engineering
  • Construction Management and General Contractor services.


LockBUILD, an elision of ‘interlocking building’, describes a system of assembling buildings utilizing a modular based, mechanical and grout method of interlocking to fabricate and assemble, on site, structures that primarily rely on locally available raw building materials.  Rather than bolting, welding, nailing, screwing and gluing together or pouring concrete into complicated wood molds encountered in conventional building construction, interlocking reduces construction time and complexity, enabling projects to be completed more quickly.  Unskilled, inexperienced labour, tutored to carry out simple tasks in fabricating and assembling building elements on site, eliminate agent, retailer, middleman and manufacturer markups and reduce or eliminate handling, packaging and delivery costs.  Combining marginal labour costs, a simplistic construction system and a novel assembly method assure the lowest possible cost of construction.


Every irreducible item, whether fabricated on site, outsourced from a manufacturer, or purchased off-the- shelf from a store, to be integrated into a LockBUILD construction project, is called an Object. Generic Objects are non-specific representations of a class or group of like objects that, when modified to perform specific functions, assume their own unique identity as Objects. Objects can be combined with or be inserted into an infinite variety of Object assemblies to perform useful tasks that simplify the assembly of a LockBUILD structure. Objects are broadly categorized as either System or Architectural Objects.

Architectural Objects, that may also include structural elements, are derived from six generic Objects: Masonry Objects, Panel Objects, Deck and Roof Objects, Stair and Ramp Objects, and interlocking Lintel Beam Objects that bridge, link and support walls, stairs, ramps, floors and roof decks. An interface between the building super-structure and its load bearing surfaces or supports, is provided by a modular set of inter-locking steel forms to create Concrete footings, Pile caps and Grade beam Objects, to more quickly complete the untidy, part of the building assembly process.

System Objects are derived from six generic Objects: Electrical Objects, Communication and Control Objects, Water Objects, Waste and Vent Objects, Solid Waste Objects, Heating and Cooling Objects. System Objects, are given a unique identity and are used to make a building System and branch Sub-Systems that, when combined with an appropriate Architectural assembly of Objects will create fully functional buildings with rooms and functional spaces. Electrical, Communication and Control Objects Sub-Systems are pre-assembled into wiring looms. Water, Waste and Vent, Solid Waste, and Heating and Cooling Objects are pre-assembled, using jigs to make a building System and branch Sub-Systems that, when combined with the appropriate Architectural assemblies of Objects, create rooms and fully functional spaces.

Modules are discrete spaces assembled from appropriate Objects suitable for specific functions or human activities that, when combined or nested within another, facilitate the assembly of a LockBUILD structure. Architectural Objects and Modules conform to a mandatory 60 cm Matrix, System Objects do not. Matrix, a dimensioning constraint to ensure that Objects, assemblies of Objects and Modules that make up a complete LockBUILD building will fit exactly together, is based on a cube and is derived from Objects commonly used to enclose a volume namely; walls, roofs and floors. The most constrained of these are Generic Masonry and Generic Panels, because of their small cross-sectional dimensions of 5 cm (2”), 10 cm (4”), 15 cm (6”), and 20 cm (8”) determine the smallest common denominator of 60 cm (2’) in both plan and elevation views. The matrix provides flexibility in planning and designing buildings and, if extended beyond the perimeter of a building to property lines, integrates anciliary structures and hardscape into the uniform design and construction processes.


Conventional construction drawings are freely sprinkled with notations that are frequently redundant, irrelevant or use labourious methods of referral to other drawings on other sheets or layers. LockBUILD eliminates this complexity by using an alphanumeric code called Keycode that completely removes the clutter of all textual notation from the drawing layers, leaving only dimensions and 3D representations of Objects or Modules linked by lines to their Keycodes. In the course of plan making a computer operator/plan