StBK News - Updated 28 August 2008
© 1997-2008 Tekn dr Goran Alpsten, Stalbyggnadskontroll AB
Steel Frames ...
Bridges, Chimneys ...
Investigation of Collapse during Erection of Steel Frame at Kista Galleria
Goran Alpsten has been commissioned to perform a formal investigation of the causes for a collapse of a steel structure during erection of concrete slab elements for a building at Kista Galleria i Stockholm (Client Kista Galleria KB).
Read more (link to web site of Kista Galleria) »
Mega Project Stockholm Waterfront
StBK have been engaged in a major project, Stockholm Waterfront in the very center of Stockholm, overlooking the famous City Hall building. The project includes an office building, a hotel building and a congress building (Clients Fastighetsaktiebolaget Bangardsposten, and 43 Hotel and Congress AB).
New Office Buildings for SonyEricsson, Lund
Goran Alpsten performs formal inspection of steel frames in new Office Buildings for SonyEricsson, Lund (Client Vasakronan AB).
Inspection of Steel Frame for Central Building, Arlanda Airport
Formal warranty inspection of steel frame for new Central building at Arlanda airport. StBK has previously performed inspection and quality audits of the steel frames of many structures at Arlanda, such as new terminal building Pier F, renovation of Pier D and E for adjustment to Schengen requirements, Terminal 2 and 3, Sky City, hangar and office buildings (Client Luftfartsverket).
Status inspection of corroded steel beams encased in concrete deck from 1910
StBK has performed a status inspection with measurements of dimensions of heavily corroded steel beams encased in a concrete deck under the inner yard of a housing block from 1910 in central Stockholm (Client BRF Eldaren nr 9).
Expert Inspection of Steel Structures in Terminal Buildings
Expert inspection of steel structures in DFDS Terminal buildings at Orebro and Malmo, Sweden (Client KPC Bygg AB).
Kista Science Tower
Expert inspection of the steel structures in Kista Science Tower, Stockholm, the tallest office building in Sweden (Client NCC).
Renovation of Office Buildings
Inspection of the steel structures in the rebuilding projects "Gravlingen" and "Stuten" in central Stockholm with complete renovation and adding more floors on top of the existing buildings (Clients Skanska and Konkret/Drott).
Arlanda Airport Project
Checking and formal inspection of steel structures of a major Arlanda airport project, including new Central building and Piers D, E and F (Client LFV).
Mast Structures on Top of Vasa Museum, Stockholm
Status investigation of steel structures on top of the Vasa Museum in Stockholm, symbolizing the rig and sails of the Vasa ship from 1628. Status investigations in the Vasa Museum have also included steel structures in walkways and bridges in the ship hall (Client Statens Fastighetsverk).
Contract Inspections of Steel Structures in Buildings
Contract inspections and warranty inspections of steel framework in buildings in several projects, such as Mitthogskolan, Ostersund; old Saab factory in Malmo; steel chimney at Norrkoping; sport arenas at Huddinge and Ekero (Clients Vasallen AB, Diligentia AB, FHP, and others).
Yearly Inspection of Steel in Gallery Building at the Solvalla Trotting-Track
StBK performs yearly inspections of vital steel structures in the grand-stand building "Kongressen" at the Solvalla Trotting-Track in Stockholm. The inspection items include tension rods connected to pylons carrying the structure (Client Stockholms Travsallskap).
New World Culture Museum in Goteborg
Client inspection during fabrication and erection of steel structures in World Culture Museum, Goteborg (Client Statens Fastighetsverk).
Client inspection of steel structures in residential blocks, Kv Klabben, Hammarby Sjostad, Stockholm (Client Prefabutveckling).
Steel Frames in School Complex, Oslo, Norway
StBK performs inspection of steel frames comprising about 800 tons of steel in a new school complex in Oslo, Norway. The assignment includes follow-up of the self-control and spot checking of the steel structures, including 3.77 m high truss beams spanning 55 m over an indoor stadium (Client Peab AS, Oslo).
Inspection of Bridge at Barkarby
Goran Alpsten carries out inspection of steel structures i a bridge at Barkarby, a highway bridge from 1932 (Client Ramboll Svenska AB)
Formal Inspection of Steel Bridge over E4 Highway
StBK has performed formal inspection of steel structures in a highway bridge over E4 at Upplands Vasby (Client Sweco/ Vagverket)
Service Platform in Stockholm Globe Arena
StBK performs client inspection at fabrication and erection of steel structures for a new overhead service platform spanning 60 m in Stockholm Globe Arena. StBK performed inspection also for the original complete Stockholm Globe Arena project (Client Hifab).
Floating Glass Roof over Vallingby Center
Goran Alpsten performs formal inspection of steel structures for a new roof to cover 4,000 sqm of pedestrian walkways in the Vallingby Center west of Stockholm (Client Svenska Bostader).
New Art Exhibition Hall at Bonnierhuset, Stockholm
StBK performs inspection of steel structures for a new art exhibition hall and offices at Bonnierhuset in central Stockholm (Client ebab).
Steel Structures in Walls for Noise Reduction at Bridges along E4
Goran Alpsten performs formal pre-inspection of steel structures in new walls for noise reduction at highway bridges B708 and B1905 vid Rotebro. This is part of the same major contract as the arch bridge over E4 at Upplands Vasby, se photo above (Client Sweco/Swedish National Highway Administration).
Formal Inspection of Steel Frames in Vallingby C
Goran Alpsten performs formal inspection of steel frames in rebuilding of office and commercial buildings in Vallingby Center west of Stockholm (Client Svenska Bostader)
Technical Audit at Hexa-Metal in Hungary
Goran Alpsten has performed a recent audit at Hexa-Metal Kft, a structural steel fabricator in Balmazujvaros in eastern Hungary. This is part of a program for regular audits at the workshop in order to verify that Swedish rules for execution and inspection are applied in the fabrication of structural steel components for the Swedish market (Client Prefabutveckling).
Assessment of Serbian Structural Steel Fabricators
Goran Alpsten has participated in a delegation from Skanska AB for assessment of two structural steel fabricators in Serbia for a planned fabrication of steel structures for a large industrial project in Sweden (Client Skanska AB).
Contract Inspections of Steel Bridges
StBK has performed contract inspections and warranty inspections of a number of steel bridges, such as six railway bridges at Karlstad and Kristinehamn, Sweden, railway bridge over Raan at Helsingborg, highway bridge over E4 (photo above), pedestrain bridges (Client National Railroad Administration and others).
Investigation of a 100 m chimney with vibration problems
Investigation of a new 100 m steel chimney in Poland with vibrations problems due to vortex shedding.
Dynamic Wind Loading of a New 37 m Flight Control Tower
StBK has assessed the dynamic wind loading of a new 37 m flight control tower at Satenas, Sweden using the computer program CHIMNEY. The assignment has included an evaluation of accelerations at oscillations due to dynamic wind loading to verify that persons in the tower will not experience unpleasant movements (Client Astadien byggkonsult AB).
Fatigue Assessment of LKAB Iron Ore Wagons
StBK har assessed the fatigue life of the steel frame of LKAB iron ore wagons. Data from on-track recordings has been evaluated, and the results are in good agreement with observations of fatigue cracks after 2.5 years of service. The results will be the basis for repairs of existing wagons, as well as design conditions for new wagons (Client LKAB).
Expert inspection of steel structures in railway bridges, Kungsbacka (Client Skanska).
Railway Bridges in Goteborg
Client inspection of fabrication and site work of steel structures in two railway bridges in Goteborg (Client City of Goteborg).
Steel in Boiler Building
Client inspection of steel structures in boiler building and flue cleaning building, Hogdalens Kraftvarmeverk, Stockholm (Client AB Fortum Varme).
Investigation of Bridge Collapse
Investigator with Tore Lundmark, Scandia-consult concerning a collapse involving a 200 ton counterweight in the Saltsjo Bridge, Sodertalje (Client NCC).
Inspection of Bridge Collapse
Consultations and inspection on site of the collapse of a steel box bridge during casting of the concrete deck (Client Insurance company).
Crane Runway Girders
Computerized design of crane runway girders in various projects using the CRANEGIRD software, including SAAB at Trollhattan, Handeloverket at Norrkoping, Alvesta Polarit at Alvesta, Forssells Smidesverkstad at Huddinge, Tibnor at Goteborg, CWO WIAB, SSAB at Oxelosund and Granges Aluminium (Clients FB Engineering, Forssells Smidesverkstad, Goinge Mek, Stalbyggnadsteknik, K-Center Byggkonsult, and others).
Courses TR-steel in Fall 2008 and Spring 2009
Dates for courses TR-steel have been set upp for fall of 2008 and spring 2009. The courses are adapted to the new BSK 07 and current European standards.
For more information, or a preliminary or a definite application, see
Course Program TR-steel.
Course TR-steel/N at Storlien/Are 15 to 20 March 2009
A course TR-steel/N (in Swedish) at Storlien/Are in the Swedish "Alps" will take place on 15 to 20 March 2009. Please note that attending a course at Storlien will be cosiderably less expensive than attending a course and staying at a hotel in Stockholm!
This course is suited - apart from supervisors and inspectors in workshops or building sites - also for structural designers who want to be informed in detail about revisedrules for materials, execution and inspection in the new BSK 07. It should be borne in mind that the chapters on execution and inspection in BSK 07 will be valid during a long transition period after the design rules of Eurocodes will be mandatory.
Course program TR-steel/N for course at Storlien »
For preliminary or definitive application, see kursprogram TR-steel.
Competence TR-steel referred to in BSK 07
The new edition of BSK 07 refers to th competence levels of TR-steel/E, TR-steel/N and TR-steel/K as examples of required competence for supervision and inspection of various kinds of steel structures.
Course "TR-svarm" on
28 to 30 Oct. 2008
TR-svarm - A competence course for persons responsible for direction, supervision and inspection of welding of reinforcement bars and welded cast-in fastening components will be arranged in Stockholm on 28 to 30 Oct. 2008. The course is based on the document "Welded cast-in fastening components in concrete - Recommendations for design, execution and inspection" (in Swedish) and a new standard for welding of rebars, SS-EN ISO 17 660.
The validity of the formal competence TR-svarm is five years. The Committee for TR-svarm has adopted new rules for extending this period. A new certificate may be obtained by participating in a new course TR-svarm (2 and a half days, new examination not required) or participating in a new examination (new course not required). This means that special update courses will not be arranged in the future.
TR-steel/E Extended to Include Steel Structures for Road Portal Signs, Lighting Masts etc.
A course TR-steel/E for supervisors and inspectors of the erection of simple pre-fabricated steel structures is planned for 2008 (in Swedish; date to be set later).
The program of the course has been extended to include also steel structures in highway equipment such as road portal signs, lighting masts, screens for noise reduction etc. (see publication 1993:61 from the national Swedish Highway Board).
Program (in Swedish) »
Preliminary Application »
New Course: Extended Preparatory Course 'Prep TR-stal/N'
A preparatory course in Steel Construction, 'Prep TR-stal/N' (in Swedish) is planned for 2008, primarily intended for those wishing to get a basic background of the practical aspects of steel construction. The course is specifically intended for those wishing to attend a later course TR-steel/N.
The course will be carried out during a week in Croatia (location not yet decided).
The program consists of 30 lecture hours. Visits to a structural steel workshop and a building site are being planned and there will also be some time for individual studies under guidance.
A major part of the program is specially suited for participants who wish a thorough review of such computational tasks which may appear for a structural steel supervisor or inspector and which are included in the written examination for TR-steel/N.
Prel. Course Program »
Prel. Application »
Revised rules for extending validity of TR-steel
The Guidance Committee TR-steel has adopted revised rules for extending the validity of competence certificates TR-steel. The five-year period of validity may be extended by participating in either a special updating course or a new examination test. Because of the revised rules more updating courses have been included in the course program for 2008/2009.
New competence course TR-steel/N in English
A competence course TR-steel/N in English related to Swedish regulations and rules for steel construction is planned to be arranged in Stockholm in 2008. For more info, click TR-steel in menu to the left.
Seminar on Bolted Connections
A seminar on bolted connections in steel construction was arranged at Malmo on 31 Jan 2008. For more information, see www.skruvforum.se The program was similar to that of three seminars arranged in Stockholm and Gothenburg in 2003 and 2004. Special delivery conditions and rules for modified S1F connections (in Swedish) will be presented.
New Publication on Welded Cast-in Components
A new document "Welded cast-in fastening components in concrete - Recommendations for design, execution and inspection" (in Swedish) prepared by Goran Alpsten and Bernt Johansson is now available from Nordcert AB (Publication 2004:3). The publication may be ordered from Nordcert AB,
tel +46 8 34 92 70, fax +46 8 30 70 54, www.nordcert.se.
Basic Course on Steel Construction
StBK participated in a basic course on Steel Construction arranged by Byggvaruindustrin in March. The course is intended as a preparatory course to TR-steel/N courses (Client Byggvaruindustrin, Danderyd).
Course on Inspection of Steel Structures
A course on inspection of steel structures has been arranged in Stockholm and Gothenburg with Stalbyggnadsteknik in Uppsala. More courses are being planned.
Seminars for Structural Steel Designers
StBK has participated in a number of internal seminars and courses for structural steel designers at various consulting firms and other companies, such as ELU Konsult AB, Prefab-utveckling AB and Tyréns AB.
Seminar on Steel Structures at the Building Authority in Stockholm
Goran Alpsten has participated on Jan. 31 in a seminar on steel structures at the Building Authority in Stockholm. The seminar focused on safety and reliability of load-carrying steel structures in buildings. The program seemed particularly appropriate after the building collapse in Poland a few days before the seminar. The program included a discussion on the role of the Building Inspector with the Building Authority. Other matters discussed were procedures for checking project documents for load-carrying steel structures and for inspection of steel structures.
New Course for Structural Steel Designers
A new course for structural steel designers is under development in cooperation with the consulting firms Konkret, Scandiaconsult, Strangbetong, Tyréns and WSP.
StBK lectures on welding in CBI courses on prefab concrete elements
Goran Alpsten participates as lecturer on welding of reinforcement and cast-in components in CBI Class II och Class I courses concerning prefab elements.
The computer program CHIMNEY for the design of chimneys, towers and similar structures with dynamic wind loading is available in a new revised version including supplemented computer drawings and inspection plan, and a separate supplementary report detailing the results for a structure with added antennas, screens etc.
The computer program CRANEGIRD for the design of crane girders and similar structures with moving loads is available in a new revised version including supplementary details on computer drawings.
CRANEGIRD is very flexible and specially suited for handling the rebuilding of existing crane girders with odd locations of supports, reinforcement of the cross section of parts of the girder, up to five independent cranes etc.
A completely revised computer program COLBUCK is now available for the analysis of compressed structural members starting from fundamental theory of buckling, and considering residual stresses, initial out-of-straightness and load eccentricities. A library with typified residual-stress distributions etc. is available if the user has no specific data.
Chimneys with Antennas
Design of steel structures for new chimneys, and checking of existing steel chimneys to be equipped with new antennas causing increased wind loading, using the computer program CHIMNEY (Clients NCC, SRK, Stark Telecom, Grabe Miljoteknik, CP Energi AB, GEAB, Mexor and others).
Number of applications using CHIMNEY exceeds 1,000
The number of applications using the computer software CHIMNEY now exceeds 1,000. Application # 1,000 concerned a steel stack for an industrial establishment in Ohio, USA for the client UTAB at Vasteras, Sweden.
Goran Alpsten writes a regular column in "Svensk Verkstad"
Goran Alpsten contributes to the technical journal "Svensk Verkstad" published by MVR with a regular column under the heading "A Word from the Steel Doctor". The column in the previous issue 2006-2 discusses surface cracks which may be present in delivered hot-rolled profiles produced in accordance with the European standard EN 10163. Previous columns have dealt with preheat temperatures for welding modern structural steels and competence development of supervisors and inspectors in the structural steel industry.
Column in Svensk Verkstad No. 2006-3 deals with new standard series for European structural steels,
SS-EN 10 025
The column in No. 2006-3 of "Svensk Verkstad" deals with the new standard series for structural steels,
SS-EN 10 025.
Click here to download the column (in Swedish).
Results from six years of continuous measurements on a steel chimney published
A paper by Par Tranvik of Alstom and Goran Alpsten has been published in the first issue 2005 of the international journal Wind & Structures. The paper is titled Structural behaviour under wind loading of a 90 m steel chimney, and deals with results from six years of continuous measurements on a tall steel chimney initially equipped with a mechanical pendulum-type damper, where initial oscillation problems led to fatigue cracks in the steel structure. A further report for this chimney later equipped with an additional friction-type wire damper, Long-term measurements of structural response of a tall steel chimney equipped with different damping devices, was presented at an international wind conference in Prague, Czech Republic in July 2005.
Seminar on probabilistic design
Professor Pavel Marek at the National Academy of Sciences in Prague and Ostrava Technical University was the guest of StBK in June 2004. Pavel Marek and Goran Alpsten worked at the StBK office at Hundsjo (see photo) on a paper on probabilistic design of steel structures. A seminar was held at WSP in Lulea with participants from WSP, Lulea Technical University, Ramboll and the Swedish National Road Administration.
Goran Alpsten member of Nordcert Technical Council on Steel Structures
The Technical Council on steel structures of Nordcert has held a meeting in Kista Science Tower. The photo shows the members on the top of the building 128 m above the ground level (Goran Alpsten to the right).
Gold Metal Award to Goran Alpsten
The Swedish Welding Commission has conferred its most prestigeous award, the Oscar Kjellberg gold medal on Goran Alpsten "for great contributions for a rational fatigue design and for deeper knowledge about fatigue of welded structures". The Award has since 1941 been bestowed on about ten recipients only.
StBK participates in annual fishing contest
StBK webmaster Kalle Alpsten landed the largest perch at the annual fishing contest arranged by Malarvarvet Steel Construction on 26 August 2004.