Space Frame Structures

The first known studies of space frame construction systems were those made by Alexander Graham Bell between 1898 and 1908 with the aim of creating the hulls of some naval and air vehicles. Bell aimed to perform these constructions by creating the lightest and strongest structures with tetrahedral Geometry.

For more than 100 years , many engineers have worked on the details of structure in this field, and many different types of structure have survived to the present day. One of the most important of these is the one developed by Dr. Ing. Max Mengeringhousen in 1943 and recorded into literature with the name of MERO system where full body high quality steel spheres are used as nodal point elements. In addition, a large number of construction systems and the node details have been developed and implemented by engineers.

Space frame construction systems are systematic and optimal constructions consisting of Rod elements and nodal elements. By the principle of combining all rod elements in nodes, the moments are avoided in nodes, and accordingly, the rod elements that make up the structure are calculated only by the assumption that they resist against tensile and compression only. Optimized and extremely light and strong roof constructions can be designed as a result of these assumption.

The basic element that includes the prefabricated structure attribute which space frame systems have is the modular system concept making up the structure. The module type making up the structure can be square, rectangular, triangular, hexagonal in shape when the selection made at the design stage.

In module selection, economy, ease of manufacturing and installation, structural analysis requirements to be performed under the loads exposed to the system, geometric conditions (axle intervals, etc.) and aesthetic elements should also be taken into account.

Advantages Of Space Frame Structures

Space frame structures provide important advantages mentioned below to the projects.

  • Space frame structures is a system that can provide hyperstatic and exact three-dimensional load distribution. It is the lightest and economical roof alternative in this aspect.
  • Due to its light weight and 3-D load distribution, it transfers less and balanced load to the load bearing structure; therefore foundations and thus load bearing structures are designed more economically.
  • Outmost care is paid in produced elements. Fast manufacturing methods based on industrial and numerically controlled production technologies.
  • Fast and easy assembly
  • Service loads applied easly, to the roof with simple details.

Design

POLARKON carries out architectural and static designs of the constructions that undertakes within the company based Architectural and Structural Design Office.

POLARKON consideration is important and necessary to carry out all its work in cooperation and coordination with other-partners necessary for the construction of the work. For this purpose, POLARKON provides the necessary contribution at the highest levelfor necessary cooperation with other project groups, during the design and phase of the construction.

Within the scope of preliminary design studies,

In accordance with the final design given by the employer;

  • Preliminary design studies of the system in accordance with existing architectural design and static requirements
  • Submission of alternative studies to the employer and / or project owner and find a way for the mutual solution and obtain the approval.
    Over the approved preliminary architectural model, structural model is developed in accordance with required aesthetics and functions,
  • Conducting structural analysis, checking the results
  • Sharing the results with the employer and / or the project owner, providing an optimal common solution by preparing alternative solutions if necessary
  • Making solutions of point details completion
  • Final designs are submitted for approval of the employer firm and / or project owner.
  • After obtaining architectural compliance and static approval, manufacturing processes starts by preparing shop drawings.

 

Manufacturing

  • All the components of the space frame constructions elements produced in its own facilities, largely with computer-aided production technologies and under self-developed quality control procedures, by POLARKON..
  • Welding operations of space frame rod elements are performed in fully automatic and computer-aided welding machines that automatically adjust their height and welding settings. The data of the production of the said elements to be welded in machine tools, that are sent from the design office computer, and the axle dimensions are also adjusted numerically. In this way, error-free and almost 100% reliable products are realized.
  • The Spheres are processed, in computer aided and numerically controlled machines. Data formatted in files that are created from structural analysis programs is transmitted to the processing center via computer. The most sensitive part of space frame structures spheres are processed completely without errors.
  • Supplementary pieces to be used in space frame manufacturing are produced in POLARKON'S own yard with CNC machines.
  • Bearings, purlin profiles, purlin struts, etc. accessories are also designed by POLARKON and manufactured in accordance with design criteria.
  • Paint and coating processes of all elements after manufacturing are carried out in POLARKON's own facilities. Rod elements, purlin struts and profiles are coated with polyester based powder coating in numerical controlled robot electrostatic powder coating machines after surface cleaning in accordance with technical specifications.

Quality Control

POLARKON carries out its production in accordance with national and international quality standards and has designed and established an ISO quality management system in order to create an effective inspection at every stage of its work for the space frame systems elements.

The system in question consists of written instructions and write procedures that describe all operations, starting with design work, purchasing, material supply, storage, manufacturing, testing, shipment, assembly and post-assembly controls.

POLARKON quality control oficce personnel provide continuous and regular service in order to control and improve the whole system.

In summary, inspection of production is completed with the quality control system in question;

All orders for the supply of the necessary materials are made by receiving offers from POLARKON's approved suppliers,

All materials are accepted after necessary tests in accordance with the acceptance procedures defined in the purchase procedures established within the framework of the quality management system,

During the manufacturing phase in every step inspected by quality control staff and each process is recorded.

In addition to physical examination and measurement checks, mechanical destructive and non-destructive tests are carried out periodically.

Electrostatic powder coating and metal coating operations, coating thickness checked by numerical measuring devices, mechanical adhesion tests performed for each elements after coating and are recorded regularly.

In brief each project that is under production in POLARKON's yard is produced with a production code and all tests and controls are monitored and recorded within the framework of the quality control plan.

Assembly

Space frame systems are realized in accordance with the pre- planning and assembled in according the plans. The inspection a made at the installation site during all assembly phase of the work.

POLARKON assembly experts prepare an assembly project, taking into account all aspects such as the environmental conditions of the site , the facilities of the region, the competency of the field team and the assembly processes in addition to static requirements for each work, etc.

Daily activities are recorded with the details in daily activity report (GFR) and they are shared with the main office. This way, monitoring of work can be followed up by the main office.

Physical inspection , measurement and post-assembly inspections are carried out and reported by POLARKON technical staff at the work site and at the end of the assembly. Final reports of completion approved by POLARKON.

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