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Seminar in Georgia
11/16/2017 Seminar in Georgia
Dear colleagues! «LIRA» group of companies is welcoming you to take part in seminar in Georgia

LIRA group of companies (Kiev, Ukraine) and Softline (Tbilisi, Georgia) invite you to take part in seminar

«Application of LIRA 10 software in structural analysis»
The seminar will present reports on new features and capabilities of the software package LIRA 10. Also, current issues of structural modeling and analysis will be discussed.

Date: 13 of December, 2017.

Place: The Biltmore Hotel Tbilisi

If you wish to participate in the seminar, you should register using the link.

SEMINAR’S SCHEDULE

New LIRA 10.6 R3.4 version has been released
11/13/2017 New LIRA 10.6 R3.4 version has been released
Release 3.4 contains corrected detected errors and some changes and additions.
Licence holders of SP LIRA 10.6 can update to 3.4 version for free.
Dear colleagues, we're informing about official release of a new SP LIRA 10.6

Release 3.4 contains corrected detected errors and some changes and additions.

SP LIRA 10.6 R3.4 is available for downloading in download section.

Licence holders of SP LIRA 10.6 can update to 3.4 version for free.
New LIRA 10.6 R3.3 version has been released
10/10/2017 New LIRA 10.6 R3.3 version has been released
Release 3.3 contains corrected detected errors and some changes and additions.
Licence holders of SP LIRA 10.6 can update to 3.3 version for free.
Dear colleagues, we're informing about official release of a new SP LIRA 10.6

Release 3.3 contains corrected detected errors and some changes and additions.

SP LIRA 10.6 R3.3 is available for downloading in download section.

Licence holders of SP LIRA 10.6 can update to 3.3 version for free.
XV International research and practice conference in Lvov
10/4/2017 XV International research and practice conference in Lvov
LIRA group of companies took part in the proceedings of International research and practice conference in Lvov

LIRA group of companies took part in XV International research and practice conference «Innovative technologies of life cycle of housing and civil, industrial and transport objects», which took place on 18-22 of September, 2017 г. in Lvov, Ukraine.

On plenary session project lead Dmitry Marchenko presented a report:
«REVIEW OF CALCULATION CAPABILITIES OF SP LIRA 10.6 FOR MODELING OF DIFFERENT LIFE CYCLE STAGES OF CONSTRUCTION OBJECT»

Presentation of report’s material are available here.
Online presentation of SP LIRA 10.6 in English
5/12/2017 Online presentation of SP LIRA 10.6 in English
We would like to present to your attention the presentation which covers main innovations of SP LIRA 10.6 in English.




Dear colleagues!
We would like to present to your attention the presentation which covers main innovations of SP LIRA 10.6 in English.

New LIRA 10.6 R3.0 version has been released
4/25/2017 New LIRA 10.6 R3.0 version has been released
Release 3.0 contains corrected detected errors and some changes and additions.
Licence holders of SP LIRA 10.6 can update to 3.0 version for free.
Dear colleagues, we're informing about official release of a new SP LIRA 10.6

Release 3.0 contains corrected detected errors and some changes and additions.

Detailed list is available in innovations section.

SP LIRA 10.6 R3.0 is available for downloading in download section.

Licence holders of SP LIRA 10.6 can update to 3.0 version for free.
New LIRA 10.6 R2.0 version has been released
2/22/2017 New LIRA 10.6 R2.0 version has been released
Release 2.0 contains corrected detected errors and some changes and additions.
Licence holders of SP LIRA 10.6 can update to 2.0 version for free.
Dear colleagues, we're informing about official release of a new SP LIRA 10.6

Release 2.0 contains corrected detected errors and some changes and additions.

Detailed list is available in innovations section.

SP LIRA 10.6 R2.0 is available for downloading in download section.

Licence holders of SP LIRA 10.6 can update to 2.0 version for free.
Presentation of software package LIRA 10.6
12/15/2016 Presentation of software package LIRA 10.6
On the 16th of November, 2016 the official presentation of new version of SP LIRA 10.6 took place at State Enterprise Ministry of Defense «Central Design Institute» in Kiev city.

On the 16th of November, 2016 the official presentation of new version of SP LIRA 10.6 took place at State Enterprise Ministry of Defense «Central Design Institute» in Kiev city.

  • Added more than 100 innovations;
  • More than 20 companies took part in testing process of new version;
  • Implemented integrations with more than 5 other CAD/CAE systems;
  • Now SP LIRA can be used to solve problems of thermal conductivity;
  • According to user’s requests stresses in bars now can be viewed;
  • Implemented load, which is not associated with grid of elements;
  • Implemented calculation of elastic-geometrical characteristics of composite bar`s cross section;
  • Added calculation of bearing capacity surface;
  • Implemented creation of 3D models of soil masses according to assigned earth bore;
  • Now stiffness of single piles, pile groups and artificial footings can be calculated;
  • Implemented Wood-Armer theory for RC plate elements;
  • Corrosion influence now can be factored in during steel construction calculations;
  • Center of rigidity and mass center can be determined for a model`s fragment
During seminar, developers team reported about new opportunities and functions of SP LIRA 10.6. And also recent designing problems in field of civil engineering were discussed:
Online presentation of SP LIRA 10.6
12/9/2016 Online presentation of SP LIRA 10.6
We invite everyone to visit the online presentation of the new version of SP LIRA 10.6 at 11 am (Moscow time) on the 13th of December, 2016.




Dear colleagues!
We invite everyone to visit the online presentation of the new version of SP LIRA 10.6 at 11 am (Moscow time) on the 13th of December, 2016.

To take part in the webinar, the preliminary registration is required using the following link:

Seminar «Use of LIRA 10.6 software package in analysis of structures and buildings»(UPDATED)
11/4/2016 Seminar «Use of LIRA 10.6 software package in analysis of structures and buildings»(UPDATED)
Dear colleagues! «LIRA» group of companies is welcoming you to take part in seminar which is dedicated to the release of new version of SP LIRA

Dear colleagues!
«LIRA» group of companies is welcoming you to take part in seminar which is dedicated to the release of new version of SP LIRA

«Use of LIRA 10.6 software package in analysis of structures and buildings»
Reports regarding new capabilities and functionality of LIRA 10.6 software package will be presented at the seminar. Relevant topics of modeling and analysis of buildings and structures will be also reviewed.

Seminar will be held on the 16th of November, 2016 at State Enterprise Ministry of Defence «Central Design Institute», 5A Narodnoho Opolchennya St., Kyiv (Ukraine).

Participation in seminar requires registration!

Those who wish to take part in the seminar have to submit an application by the 10th of November, 2016. To register you have to fill out an application form and send it via email: soft@lira.com.ua or via Tel/Fax: +38 044 520 05 23

Seminar’s schedule


We look forward to seeing you on the 16th of November, 2016 at
State Enterprise Ministry of Defence «Central Design Institute»,
5A Narodnoho Opolchennya St., Kyiv.

Summary of International research and practice conference «Issues of theory and practice of antiseismic construction»
11/1/2016 Summary of International research and practice conference «Issues of theory and practice of antiseismic construction»
LIRA group of companies took part in the proceedings of International research and practice conference which was dedicated to 90-year anniversary from the birth of professor V.K. Egupov

LIRA group of companies took part in the proceedings of International research and practice conference which was dedicated to 90-year anniversary from the birth of professor V.K. Egupov «Issues of theory and practice of antiseismic construction». Conference took place on 25-28th of October, 2016 in Odessa, Ukraine.

Following relevant topics were discussed within the scope of the conference:
  • development of 3D methods of buildings and structures seismic resistance analysis;
  • normalization of seismic actions;
  • looking for effective solutions of increasing seismic resistance of buildings and structures;
  • seismic microzoning of construction sites;
  • organization of seismic monitoring of essential objects.
At affiliated meeting Geraymovich Yuri Dmitrievich, Candidate of Technical Sciences, chief operating officer of LLC «PRIME CAD», made a report on the topic:
«IMPLEMENTATION OF PROVISIONS OF DSTU-N B EN 1998–1:2010 IN LIRA 10.6 SOFTWARE PACKAGE».

Report presents an overview of methods of seismic analysis which are implemented in LIRA 10.6 software package in accordance to DSTU-N B EN 1998-1:2010: lateral force method of analysis, modal response spectrum analysis, nonlinear static analysis and nonlinear time-dependent dynamic analysis.
Takeaways from XIV International research and practice conference
9/27/2016 Takeaways from XIV International research and practice conference
Dear colleagues, we are informing about takeaways from research and practice conference

Dear colleagues, we are informing about takeaways from research and practice conference





LIRA group of companies took part in activities at XIV international research and practice conference «Innovative technologies regarding lifecycle of housing and civil, industrial and transportation objects», which took place on 19-23 of September, 2016 in Kamianets-Podilskyi city, Khmelnytskyi oblast, Ukraine.

Experts of LIRA group of companies presented following reports at plenary meeting:
  • SOME PROBLEMS OF COMPUTER MODELING OF BUILDINGS AND STRUCTURES AND WAYS OF THEIRS SOLUTION IN SP LIRA 10.6 report was presented by Marchenko Dmitry Vladimirovich, project manager, LIRA group of companies.

    Report dedicated to review of main topics and problems, faced by users of previous versions of SP LIRA. There have been suggested ways of these problems’ solution using toolkit of SP LIRA 10.6.
  • IMPLEMENTATION OF PROVISIONS OF DSTU-N B EN 1998-1:2010 IN SP LIRA 10.6 report was presented by Geraymovych Yury Dmitriyevich, Candidate of Technical Sciences, executive director of LLC «PRIME CAD».

    Report presents a review of seismic analysis approaches, which were implemented in SP LIRA 10.6 software package in accordance to DSTU-N B EN 1998-1:2010: analysis using lateral forces approach, modal response spectrum analysis, nonlinear static analysis and nonlinear dynamic time history analysis.
Reports of SP LIRA experts have been accepted by audience with a keen interest and drew an active discussion.

You can get familiar with SP LIRA 10.6 innovations at conferences, seminars and workshops. Details regarding official release of new version will be provided later.

We would like to extend our appreciation to organizers of the conference for an excursion to Сhernivtsi National University named after Yurii Fedkovich. Central building of the University is an ex-residence of the metropolitans of Bukovina and Dalmatia, and it is included in the UNESCO heritage list.

Joint webinar with Steel construction development association (SCDA)
9/20/2016 Joint webinar with Steel construction development association (SCDA)
New gauges for steel structures. Implementation of new gauges for steel structures in SP LIRA 10.4
New gauges for steel structures. Implementation of new gauges for steel structures in SP LIRA 10.4

New LIRA 10.4 R5.2 version has been released
8/4/2016 New LIRA 10.4 R5.2 version has been released
Release 5.2 contains corrected detected errors.
Licence holders of SP LIRA 10.4 can update to 5.2 version for free.
Dear colleagues, we're informing about official release of a new SP LIRA 10.4

Release 5.2 contains corrected detected errors.

Detailed list is available in innovations section.

SP LIRA 10.4 R5.2 is available for downloading in download section.

Licence holders of SP LIRA 10.4 can update to 5.2 version for free.
Webinar series «SP LIRA 10 in terms of problems». Topic 15. Ins and outs of dxf import. Guidance for preparation of drawings (RUS)
7/18/2016 Webinar series «SP LIRA 10 in terms of problems». Topic 15. Ins and outs of dxf import. Guidance for preparation of drawings (RUS)
Job execution speed possess a great value in modern design process. On frequent occasions, design engineers have to carry out a heavy workload under tight deadlines. Under such conditions structural engineer rushes to shorten the task time by any means.
Job execution speed possess a great value in modern design process. On frequent occasions, design engineers have to carry out a heavy workload under tight deadlines. Under such conditions structural engineer rushes to shorten the task time by any means. One of the ways is to shorten time of design model creation by means of floor plans import employment.
New LIRA 10.4 R5.0 version has been released
6/24/2016 New LIRA 10.4 R5.0 version has been released
Release 5.0 contains a wide range of new capabilities and corrected detected errors.
Licence holders of SP LIRA 10.4 can update to 5.0 version for free.
Dear colleagues, we're informing about official release of a new SP LIRA 10.4

Release 5.0 contains a wide range of new capabilities and corrected detected errors.

Detailed list of innovations of 5.0 release is available in innovations section.

SP LIRA 10.4 R5.0 is available for downloading in download section.

Licence holders of SP LIRA 10.4 can update to 5.0 version for free.
Resumption of webinar series «SP LIRA 10 in terms of problems: Topic 14» (RUS)
6/17/2016 Resumption of webinar series «SP LIRA 10 in terms of problems: Topic 14» (RUS)
We invite you to take part in resumption of webinar series “SP LIRA 10 in terms of problems»
Topic 14: Stability analysis of structures. General and local stability
We invite you to take part in resumption of webinar series «SP LIRA 10 in terms of problems»
Topic 14: Stability analysis of structures. General and local stability
Research and practice seminar «Innovative methods of design of buildings and structures»
5/18/2016 Research and practice seminar «Innovative methods of design of buildings and structures»
We would like to invite you to take part in research and practice seminar «Innovative methods of design of buildings and structures» on the 24th of May, 2016 at R. Gamzatov National library of Republic of Dagestan (43 Rasul Gamzatov Ave, Makhachkala).
Dear Colleagues!

We would like to invite you to take part in research and practice seminar «Innovative methods of design of buildings and structures» on the 24th of May, 2016 at R. Gamzatov National library of Republic of Dagestan (43 Rasul Gamzatov Ave, Makhachkala).

Seminar’s organizers are DNTU (innovative higher education establishment with high scientific and intellectual capacities), «LIRA soft» company (developer of LIRA 9.6 and LIRA 10.x software) and «INFARS» group of companies which is specialized in implementation of packaged solutions, supply of software products and training in the field of computer aided design, management and geoinformation systems.

The issues under discussion are innovative approaches to design of buildings and structures. The special focus will be on design and simulation software and issues of provision of seismic safety.

Developers of SP LIRA 10.4, teaching staff and students of FSBEE HPE «DNTU», experts of professional association of design engineers, representatives of inspection and government entities will be among seminar attendees.

Schedule of research and practice seminar assumes active participation of listeners in discussion of relevant issues of structural design and analysis, briefing with developers of SP LIRA 10.4 and training within the scope of workshop (official members of research and practice seminar will receive certificates of «LIRA soft» company).

We invite professionals of your organization (design engineers, structural analysts, experts, chief project engineers) to take part in the event.

New LIRA 10.4 R4.0 version has been released
11/25/2015 New LIRA 10.4 R4.0 version has been released
More than 20 new gauges, two-way interoperability with Tekla Structures, consideration of architectural elements and many other things.
Dear colleagues, we're informing about official release of a new SP LIRA 10.4

Release 4.0 contains a wide range of new capabilities and corrected detected errors:
  • Added export of architectural model to ifc format which leads to two-way interaction with Tekla Structures
  • OpenGL version has been updated to 3.3 for new rendering algorithm of design model. Thereby, operations with large-scale models became even simpler and faster
  • For cross sections analysis considering bending torsion, there was added 5 new loading types, utilized in model feature 7. Added an opportunity to perform displacements unification by W (warping) for model feature 7. Bending torsion may have a significant influence on steel thin-walled bars of open profile, such as I-beam (symmetrical or asymmetrical) and channel bar. Bending torsion comes with bending of certain parts of cross section. For example, horizontal bend of each flange in opposite directions takes place during torsion of I-beams (with vertical web and horizontal flanges). Two oppositely directed bending moments form flexural-torsional bimoment, and its value defines bending torsion
  • In results conversion mode, there has been added a consideration of architectural elements, so users can promptly pass out to other software not only geometry changes, but cross sections changes, that were passed out manually earlier
  • Significantly expanded steel gauge database, added more than 20 new gauges
Detailed list of innovations of 4.0 release is available in innovations section.

SP LIRA 10.4 R4.0 is available for downloading in download section.

Licence holders of SP LIRA 10.4 can update to 4.0 version for free.

New LIRA 10.4 R3.0 version has been released
6/1/2015 New LIRA 10.4 R3.0 version has been released
The new release of software package for structural modeling and analysis using finite element method (FEM) has been released – SP LIRA 10.4 R3.0

The new release of software package for structural modeling and analysis using finite element method (FEM) has been released – SP LIRA 10.4 R3.0

In 3.0 release there was added a wide range of new capabilities and identified issues were corrected, you can check out all innovations using a link.


SP LIRA 10.4 R3.0 is available for downloading at "Download section".

For SP LIRA 10.4 licence holders update to 3.0 release is for free.
New LIRA 10.4 R2.0 version has been released
2/24/2015 New LIRA 10.4 R2.0 version has been released
The new release of software package for structural modeling and analysis using finite element method (FEM) has been released – SP LIRA 10.4 R2.0

The new release of software package for structural modeling and analysis using finite element method (FEM) has been released – SP LIRA 10.4 R2.0

In 2.0 release there was added a wide range of new capabilities and identified issues were corrected, you can check out all innovations using a link.


SP LIRA 10.4 R2.0 is available for downloading at "Download".

For SP LIRA 10.4 licence holders update to 2.0 release is for free.
New LIRA 10.4 R1.0 version has been released
12/16/2014 New LIRA 10.4 R1.0 version has been released
«LIRA soft» company announces release and official start of sales of the new version - LIRA 10.4

«LIRA soft» company announces release and official start of sales of the new version - LIRA 10.4

«LIRA soft» company announces release and official start of sales of new version of multifunctional software for design and analysis of building and mechanical structures.
SP LIRA new version is even simpler and effective and that's why developers are sure that all users will appreciate the work that’s been completed.

SP LIRA 10.4 main innovations touched the following systems:

  • Bridge
  • Soil
  • Variation of models
  • PUSHOVER Analysis
  • Finite elements with intermediate nodes on edges
  • Reinforced concrete structures
  • Graphics system
  • Steel structures
SP LIRA 10.4 innovations are published in 10.4 version

SP LIRA 10.4 is a modern and convenient tool of the BIM – level, designated для computational analysis of structural strenght and stability using finite element method. Analysis with SP LIRA 10.4 will allow to avoid possible errors by increasing the assessment of reliability of adopted structural concepts.

Download distribution package SP LIRA 10.4 (R1.0)
New LIRA 10.2 R3.1 version has been released
8/25/2014 New LIRA 10.2 R3.1 version has been released
«LIRA soft» company announces the release of new SP LIRA 10.2 R3.1

«LIRA soft» company announces the release of new SP LIRA 10.2 R3.1.

Several computational algorithms are optimized and improved in 3.1 release.


Changes in SP LIRA 10.2 (R3.1):

Graphics system:

  • operations in displacement unification mode have been modified;
  • operations of nodes copying, which belong to ARB, and nodes, which belong to displacement unification groups, have been improved;
  • improved selection algorithm in filter by values;
  • improved operations of axial alignment mode for plate elements;
  • corrected import error of some cross sections from Revit Structure 2014;
  • added an option of design model import from Revit Structure 2015;
  • refined logic of DCF selection for simultaneous loadings;
  • Help has been updated and extended.

Reinforced concrete structures:

  • accelerated analysis of elements, which belong to unified groups of DCF;
  • corrected rarely occurred error during reinforcement calculation according to DCL;
  • modified algorithm of reinforcement calculation for bars of hollow circular sections;

Soil:

  • modified algorithm of bedding values C1 and C2 calculation.

Download distribution package SP LIRA 10.2 (R3.1)
New LIRA 10.2 R3.0 version has been released
6/2/2014 New LIRA 10.2 R3.0 version has been released
«LIRA soft» company announces the release of new SP LIRA 10.2 R3.0. SP LIRA improving, becomes faster, convenient and effective from with any new release.

«LIRA soft» company announces the release of new SP LIRA 10.2 R3.0.
SP LIRA improving, becomes faster, convenient and effective from with any new release.



SP LIRA 10.2 (R3.0) innovations:

Added option to select language of the interface and documentation
  • Added option to change interface language at any given software package's operational stage. Besides Russian interface language, which was implemented earlier, there were added English and Ukrainian languages;
  • Added independent from interface language option to select documentation language (reports, tables of input data and calculation results).

Extended Help
  • Several additions and updates to the Help system were made;
  • Added tutorial «Exercise 10 - Analysis of the structure on elastic foundation using Soil Editor».

Added option to switch between the types of selected objects in "Select nodes and elements" mode
  • In «Marks» mode there were implemented quick switches between types of selected objects using how keys at keyboard.

Concepts of loadings editing and filter by loads value have been updated

  • Improved graphic interface in Loads editing / Loads filter modes. Loads editing / filter takes place during displaying by list of all loads on the selected objects.


Optimized logic of detachments assignment mode

  • Corrected logic of assignment of relative detachments in model's elements. Interface of policy and assigning of detachments has been refined.

There was added an option to factor in color mosaic during Vibration or Displacement recording

  • Displayed color mosaics are factored in video file record in Deformation, Vibration modes and Buckling modes animation mode.

Added auto diagnostics of possibility to delete cross sections, materials and structural design parameters

  • Warning message is displayed if deleted cross sections, materials and structural design parameters are assigned to elements.

Algorithm of spatial soil model creation using assigned boreholes has been improved. Graphics interface during assigning and editing of boreholes and loadings has been improved

  • Algorithm of automatic soil model creation according to assigned geological conditions has been improved;
  • Arbitrary profile generation algorithm of created spatial soil model has been modified;
  • Settings of Soil Editor's graphic interface has been expanded.

Download distribution package SP LIRA 10.2 (R3.0)
New LIRA 10.2 R2.0 version has been released
3/14/2014 New LIRA 10.2 R2.0 version has been released
Innovations description. New functionality - New capabilities!
New release of SP LIRA 10.2 (R2.0) has came out
Innovations description is given below.
New functionality - New capabilities!!..



SP LIRA 10.2 (R2.0) innovations


  • Option of "Sticky pointer" at architectural element's edge center has been implemented
  • Option to add node at architectural plate's edge center has been implemented
  • Option to copy properties from architectural elements has been implemented
  • Option to create architectural plates by displacement of generatrix made of architectural bars
  • New table of DCF coefficients has been added
  • Cross section's dimensions visualization has been added in cross sections table
  • Option to add nodes along circumference set by three points has been added
  • Nonlinear material (14) graph displaying algorithm has been improved
  • Added option of displaying displacement diagrams for bar elements across design model caused by loadings and DCL
  • Construction axes displaying algorithm has been improved
  • Added option to select nodes and elements via planes made of construction axes and elevation indicators
  • Implemented deleting of unused cross sections, materials and structural design parameters in «Packing» mode
  • Implemented fast transition between various systems of units (user-defined, SI, English)
  • «Loading analysis» mode was modified
  • Added option to drag nodes to line
  • Nodes and elements local information has been added to all modes of calculation results visualization


  • Floor plans import from *.dxf format has been implemented
  • Curved walls import from Revit Structure 2014 has been improved


  • Algorithm of spatial soil model creation using boreholes has been improved
  • Calculation factoring in soil layers with width lesser than 0,2 m has been improved
  • Improved boreholes visualization
  • Improved user interface options: boreholes copying, moving, rotating, etc.


  • Torsion analysis of reinforced concrete cross sections according to all codes has been improved
  • Optimized crack width calculation algorithm according to DSTU B V.2.6-156:2010 and Eurocode 2
  • Significantly improved dialog box of cross sections with calculated reinforcement
  • Improved performance of interactive report of punching shear calculation


  • Improved visualization of composite cross sections in «Cross sections editor» during calculation results analysis
  • Consideration of shear areas in composite cross sections has been added
  • Design of composite cross sections according to DBN V.2.6-163-2010 has been improved
  • Added option to filter elements during calculation results analysis using interactive report
  • Deflection calculation algorithm has been modified


Download SP LIRA 10.2 (R2.0) distribution package
New LIRA 10.0 R3.2 version has been released
7/22/2013 New LIRA 10.0 R3.2 version has been released
More than 12 innovations in SP LIRA 10.0

More than 12 innovations in SP LIRA 10.0

In the R 3.2 release

  • Option to calculate loadings combinations (DCL). You can analyze displacements, internal forces, stresses and reaction forces using calculated DCL, as well as perform design calculations in structural design systems and evaluate buckling modes and stability factors;
  • Option to use user-defined reinforcement patterns for bars and plates;
  • Solid FE in import/export features to neu and iges formats;
  • "Quick screen image capture" option;
  • Option of arbitrary positioning of design model in space for rectangular and polar dynamic design grids;
  • Option of bar FE merging in "Merging of FE" mode;
  • Adding equally nodes spaced between selected points were simplified in "Add nodes" mode;
  • Option to consider nodes, bars and plates, which intersect triangulation contour was added to Triangulation tab in "Add FE" mode;
  • Sorting criteria during single selection of nodes and elements has been changed (objects, that are closer to the user, are placed higher in dropdown list of nodes and elements);
  • Consideration of elements unification in table of critical DCF;
  • «TC 1381 - 020 - 00186654 - 2011 Longitudinally welded steel tubes» gauge;
  • Area of calculated or specified reinforcement has been placed into separate section of measurement units.
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