Project name: 
Project category: 
Small projects
Main Part Design OÜ
Project location: 

Prefabricated timber-frame private house erected in fast schedule 

This project’s location is Drøbak, Norway. It is a private house with two stories and an underground garage. The house was designed to utilize timber-frame technology and prefabrication in a factory. Because of the challenging weather conditions in the location, short erection time was a critical success factor for the project.

The project involved 163 prefabricated assemblies, 55 prefabricated parts, including glulam and steel parts, 17 assembly drawings and 60 detail drawings. Main Part Design OÜ provided detailing, structural design and erection and prefabrication consultancy for the project.

Structural design took 10 weeks and was carried out using four different software products. Architectural design was done in Revit, and the architectural IFC model was used as a reference in structural design. Details were created using AutoCAD software and static calculations using Dlubal RFEM.

Objective to provide as ready a product as possible for the construction site

The main challenges of the project included the short design time and the lack of tools for timber-frame and glulam connection design. 

The main idea was to provide as ready a product as possible for the construction site, including walls, ceilings, roofs, railings, sheet metal parts and windows. Steel connections, too, were prefabricated at the factory. As a result, the assembly of the house only took five weeks.

Several plugins (MPD filtering, Timber Frame and Gluelam connection) were developed to speed up the design work to fit the tight schedule. During design process all materials are divided by 30 phases and 17 part prefixes. Inside them is reserved logic that uses “MPD filtering plugin” to filter all materials by preseted rules to automatically fill “Delivery specification” form. For example external batten material uses prefix “B” and hundreds of modeled parts finally filtered to one row using “B,H,L,rm” logic. Tekla Structures (2016i) provided extensive customization possibilities and a link to Revit and Dlubal and thereby helped keep up with the schedule.

During the design, production and assembly, Tekla BIMsight software was used as a communications tool with project parties Komforthus Eesti OÜ and Pinska OÜ. Finnwood was another software product used in the project.

Reference models to Tekla Structures were received in IFC format, and in addition, the design team communicated in DWG and PDF format. The client received both the drawings and the building information model at the end of the project.

Project parties:  

Structural design and detailing: Main Part Design OÜ 

Contractor: Komforthus Eesti OÜ

Fabrication: Pinska OÜ


Project details
Prefabricated assemblies
Drawings (assembly and detail)
Structural design
10 weeks


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