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Pt.0 Ch.3 Plan approval documentation types - definitions

The present edition of this chapter, dated January 2010, supersedes the July 2009 edition of the same chapter. Main changes coming into force 1 January 2010:

  • Sec.2 Documentation Types
    • Document type G060 has been amended.
    • Document type H130 and H131 has been amended.
    • A new document type H133 - Erection and inspection plan has been added.
    • New document types I240 - Hardware-in-the-loop test package documentation and I250 - Hardware-in-the-loop test package report have been added.
    • Document type M040 has been amended.
    • A new document type M061 - Welding procedure qualification record has been added.
    • Document type M080 has been amended, M082 has been deleted and for M041, M081, M083 and M084 the titles have been amended.
    • A new document discipline “Q - Quality management” has been added.
    • A new document type Z041 - Ship construction file has been added.
    • Document type Z310 has been amended.

Pt.1 Ch.1 General Regulations

Main changes adopted January 2010.

Coming into force 1 January 2010:

  • Sec.1 Classification Principles
    • A new item A223 defining patrolling has been added and the following items have been renumbered accordingly
  • Sec.2 Assignment of Class
    • In item A502 surveys carried out at the construction site and/or at the sub-suppliers will also be covered by patrolling in accordance with IACS UR Z23.

Pt.1 Ch.2 Class Notations

Main changes adopted January 2010.

Coming into force 1 January 2010:

  • Sec.1 Class Notations
    • In Table C2, the row covering special feature notation EL-1 has been deleted and the row covering EL-2 has been amended.
    • In Table C6, new rows have been inserted covering the new class notations ECA(SOx-A) and ECA(SOx-P).
    • In Table C6, new rows have been inserted covering the new class notation SILENT.

Coming into force 1 July 2010:

  • Sec.1 Class Notations
    • In Table C4 the class notation PIMS-HULL has been deleted. The service is replaced by a planned maintenance system (PMS)- hull.
    • In Table C6, a new line related to class notation (N) - ship also complying with the requirements of the Norwegian Maritime Directorate (NMD) or the Norwegian Petroleum Directorate (NPD) has been inserted. The notation (N) may be applied to ships with class notation CRANE (NPD).

Pt. 2 Ch.3 Fabrication and Testing of Structures

Main changes adopted January 2010

Coming into force 1 January 2010:

  • Sec.1 General Requirements
    • The terms in item B101 has been modified to comply with IACS UR Z23.
    • The requirements in Sub-section C. Documentation Requirements, have been modified.

Significant editorial changes adopted January 2010

Taking effect immediately

  • Sec.7 Non Destructive Testing of Welds
    • The last sentence in item B101 is modified.

Pt.3 Ch.1 Hull Structural Design - Ships with Length 100 Metres and Above

Main changes adopted January 2010

Significant editorial changes taking effect immediately

  • General
    • In the formula for minimum thickness for stiffener web and flange in Sec.6 C603, C703, C802, Sec.7 C302, Sec.8 C303 and Sec.9 C202, “h (profile height in mm)” has been changed to “hw (web height in mm)”, for clarification.
  • Sec.1 General Requirements
    • Item A101 is amended. Requirements for material certificates given in Sec.2 A200 are also applicable for vessels with the CSR notation.
  • Sec.2 Materials
    • In Table B2, row for “C4” and column for material class/grade the last line has been changed to read: “Min. Class IV within the cargo region”.
  • Sec.15 Special Requirements - Additional Class
    • In Table A1, 4th row, 3rd column has been amended regarding stiffener-frame connections and table-notes 2) and 3) have been deleted.
    • Sub-section element D200 is amended to be aligned with the class notation PSPC(X)
    • Item D301 has been amended.
    • Item E103 has been amended regarding stiffener-frame connections.
    • In item E501, the fatigue design life in NAUTICUS (Newbuilding) is corrected to 20 years in world wide, and the last sentence regarding weld induced SFC has been deleted.
    • Item E502 has been amended regarding stiffener-frame connections.
  • Sec.16 Fatigue Control
    • The last sentence of Item A401 is amended to cover the world wide scatter diagram.

Pt.3 Ch.2 Hull Structural Design Ships with Length less than 100 Metres

Main changes adopted January 2010

Significant editorial changes taking effect immediately

  • General
    • In the formula for minimum thickness for stiffener web and flange in Sec.5 C503, C602, C803, Sec.6 C302, Sec.7 C302 and Sec.8 C202, “h (profile height in mm)” has been changed to “hw (web height in mm)”, for clarification.
  • Sec.2 Materials
    • In Table B2, row for “C4” and column for material class/grade the last line has been changed to read: “Min. Class IV within the cargo region”.

Pt.3 Ch.3 Hull Equipment and Safety

Main changes coming into force 1 January 2010

  • Sec.7 Corrosion Prevention
    • SOLAS Reg.II-1-3-2 became mandatory for all vessels with contracts signed on or after 1 July 2008. On this basis the section has been completely revised.

Main changes coming into force 1 July 2010

  • Sec.5 Foundations for Deck Machinery, Towing Equipment and Lifting Appliances
    • In sub-section C the requirements for emergency towing procedures are aligned with SOLAS MSC256(84) and Circ.1255. In Item C103 the design criteria for shipboard fittings intended used for emergency are clarified.
  • Sec.6 Openings and Closing Appliances
    • In Item E407 the special requirement to connection area for hatch cover stiffeners has been substituted by a reference to the general requirements given in Ch.1 Sec.11.
  • Sec.10 Internal Communication
    • Sub-section element C500 has been completely revised since battery-less telephones are no longer required as the 2nd telephone system.

Significant editorial changes taking effect immediately

  • Sec.3 Anchoring and Mooring Equipment
    • The last sentence of Item A102 dealing with voluntary certification of towlines and mooring lines has been clarified.
    • Item A301 has been amended to reflect that a DNV product certificate is no longer required for chain stopper.
  • Sec.5 Foundations for Deck Machinery, Towing Equipment and Lifting Appliances
    • In item C305 the requirement for a DNV product certificate (NV) has been deleted.

Pt.4 Ch.4 Rotating Machinery, Power Transmission

Main changes adopted January 2010

Coming into force 1 July 2010

  • Sec.1 Shafting
    • In Table C1, First line (i.e. Shafts for propulsion when torque > 100 kNm); fifth column (Ultrasonic testing): is changed from:“W” to “NV*”.
    • In Table C1 a table footnote is added to the “NV*”, saying: “* Can be relaxed to “W” if IACS Recommendation 68 is used as basis for the UT.”

Pt.4 Ch.8 Electrical Installations

Main changes coming into force 1 July 2010

  • Sec.1 Service Description
    • Table B1: Requirement for “Schedule of batteries” as part of the new system information is deleted.
  • Sec.2 System Design
    • A105 b): Added “intrinsically safe circuits”
    • C302 b): Following clarification added: “If overcurrent protection release is integrated in the circuit breaker, the setting of this release shall be set at its maximum value”
    • F401: Requirement to duplicated supply to navigation equipment deleted.
    • F500: Rules for power supply to internal communication have been deleted. Requirements to power supply to internal communication systems is covered by flag state rules and IMO.
    • I201: The requirement for installation of pipes above switchboards has been rewritten.
  • Sec.3 Equipment in General
    • D302: Requirement to cable entrance clarified.
    • D401: Clarification that hinged doors only need earthing when equipped with electric components with voltage exceeding 50 V.
  • Sec.4 Switchgear and Control gear Assemblies
    • A103: Guidance note clarifying that connections of conductors etc. need maintenance is deleted.
  • Sec.10 Installations
    • Table B1: The required IP rating of control desks in dry control rooms may be relaxed.
    • Table B1: IP grade required for instrumentation components in dry control rooms and switchboard rooms is changed from IP 22 to IP20.
    • C202 b): Requirement to 300 mm separation between high voltage cables and low voltage cables is deleted. New requirement in line with IACS UR E11: “High voltage cables are not to be installed on the same cable tray for the cables operating at the nominal system voltage of 1 kV and less.”
    • C203: Requirement to segregation of power and control cables deleted.
    • C505 d): Requirement to cable support close to entry through cable gland is deleted.
    • C603 d): Requirement to fixing of cables pulled in pipes is reworded.
    • C703: Requirement to wall thickness of cable pipes deleted.
  • Sec.11 Hazardous Areas Installations
    • Table B1: The requirements for documentation of Is-circuit limits and values are clarified.
    • D200: The Sub-section element is renamed “Cable types”.
    • D201: Wording of a) and b) is aligned with IEC 60092-502 clause 7.4. Part c) to f) are moved to D202.
    • D202: A new paragraph named “Fixed cable installation” contains parts c) to f) of the previous D201.
    • D207: The paragraph is renumbered from the previous D206. Part a) is moved to D201. Requirements to earthing of braiding and screens in Is circuits are aligned with IEC 60092-502.

Pt.5 Ch.1 Ships for Navigation in Ice

Significant editorial changes adopted January 2010

Taking effect immediately

  • Sec.4 Non Destructive Testing of Welds
    • In the second paragraph in item J404, the text “CTE or 2/3CLE” has been corrected to “2/3CTE or 2/3CLE”.
  • Sec.8 IACS Unified Requirements For Polar Ships (Tentative Rules)
    • In item C602 the formula for net web thickness has been corrected.
    • In Sub-section E the ice force calculation formulas for appendages have been withdrawn. Assessment of the loads will be done on a case by case basis until new formulas are published.

Main changes coming into force 1 January 2010

  • Sec.2 Basic Ice Strengthening
    • Sub-section element C200 “Design of propeller and propeller shaft” has been amended as a consequence of changes to Sec.3.
  • Sec.3 Ice Strengthening for Northern Baltic
    • Sub-section element A400 “Documentation requirements” has been amended.
    • New design loads for propeller and shafting have been introduced and Sub-section J “Propulsion Machinery” has been completely revised.
  • Sec.4 Vessels for Arctic and Ice Breaking Service
    • Item A401 has been amended as a consequence of changes to Sec.2 and Sec.3.
  • Sec.6 Winterization
    • Item C402 has been amended giving an opening to use the damage extent description from MSC/Circ. 1056.
  • App.A Guidelines for Strength Analysis of the Propeller Blade using Finite Element Method
    • This new guideline has been introduced as a consequence of the above changes.

Pt.5 Ch.2 Passenger and Dry Cargo Ships

Main changes coming into force 1 January 2010

  • Sec.5 Dry Bulk Cargo Carriers
    • Previous item A127 regarding special feature notation EL-1, has been deleted.
    • Previous item A308 regarding special feature notation EL-1, has been deleted.
    • The title of Sub-section H has been amended.
    • Previous item H101 regarding special feature notation EL-1, has been deleted and previous item H102 (now H101) has been amended.
    • Previous Sub-section element H300 has been deleted. Previous H400 has been renumbered H300 and previous Table H2 has been amended and renumbered Table H1.

Main changes coming into force 1 July 2010

  • Sec.4 Dry Bulk Cargo Carriers
    • In A107 the HC notations are made voluntary for special vessels.
  • Sec.5 Dry Bulk Cargo Carriers
    • A new item A124 is inserted where the additional notation IB(3) is introduced for Ore and Bulk Carriers with length L > 150 m.

    • In A302 the document requirements are updated.

  • Sec.6 Container Carriers
    • In item G202 the rating for 20' containers is updated to 30 480 kg according to ISO 668, 2005 amendment.
    • In item G301 the formula for transverse acceleration for container securing calculations on deck has been updated.

    • In items G301 and G302 the way of determining the combined longitudinal acceleration is amended.

Pt.5 Ch.3 Oil Carriers
Significant editorial changes adopted January 2010

Taking effect immediately

  • Sec.11 Inert Gas Plants

    • The table in item F101 is amended to cover electrical motor and motor starter > 100 kW.

Pt.5 Ch.4 Chemical Carriers
Significant editorial changes adopted January 2010

Taking effect immediately

  • Sec.16 Inert Gas Plants

    • Table B1 is amended to cover electrical motor and motor starter > 100 kW and air compressor > 100 kW.

Pt.5 Ch.5 Liquefied Gas Carriers
Significant editorial changes adopted January 2010

Taking effect immediately

  • Sec.16 Gas Operated Propulsion Machinery

    • In Sub-section B all references to diesels engines are removed. Namely in items B106, B202 and B208. Arrangements of gas supply to diesel engines are covered in Pt.6 Ch.13.

  • Sec.18 Inert Gas Plants

    • Tables A1 and A2 are amended to cover electrical motor and motor starter > 100 kW and air compressor > 100 kW.

Pt.5 Ch.7 Tugs, Supply Vessels and other Offshore/Harbour Vessels
Main changes coming into force 1 July 2010

  • Sec.3 Supply Vessels
    • In A200: Documentation status for towing arrangement updated to be in line with TUG notation.
    • Item B201: Clarification of existing text to weather deck for cargo for vessels less than 100 meters has been introduced.
    • Item E102: Requirements to section modulus for web frames, stringers and longitudinals in the ship sides up to second deck above freeboard deck have been introduced due to more frequent use of longitudinally stiffened ship side.
    • Item E201: The existing design loads have been modified and new design loads due to transverse and longitudinal force have been introduced.
    • Item E301: The existing design loads have been modified and clarification of existing text has been done.

    • Item E408: Table E1 has been modified with respect to the safety factors based on relevant practice.

  • Sec.17 Standby Vessels
    • Item A501: New paragraph is inserted clarifying the requirements to the propulsion systems.
    • Item B102: New requirement introduced where the ship side shall have longitudinal fenders at cargo deck and forecastle deck. In way of the rescue zone, where fenders shall be omitted, new requirement to the side plating and sheer strake have been introduced.
    • Item B105: The design load requirement to scantlings of foundations and supports of towing winch and towing hook has been modified to also satisfy two times the specified bollard pull and text otherwise clarified.
    • Item C110: New paragraph is inserted with requirements to a decontamination area onboard the vessel for cleaning survivors and crew.

    • Item C201: The existing requirements for the survivors' spaces have been revised and further detailed and clarified, defining basic parameters in line with current industry practice and existing regulations issued by different Administrations.

Significant editorial changes taking effect immediately

  • Sec.2 Tugs

    • In item B403 and B501, the term “watertight” has been changed to “weathertight”.

Pt.5 Ch.11 Carriage of Dangerous Goods
Main changes coming into force on 1 July 2010

  • Sec. 1 General Requirements
    • The BC Code (Code of Safe Practice for Solid Bulk Cargoes) name change to the IMSBC Code (International Maritime Solid Bulk Cargoes Code). This has been corrected wherever it's found necessary.

    • C100: Some orthographical discrepancies corrected.

  • Sec. 2 Requirements for carriage of dangerous goods in various types of cargo spaces
    • B305: Requirements for electrical equipment in extended hazardous areas second item has been changed to: - be suitable for zone 2, see Pt.4 Ch.8 Sec.11 C200.
    • B401: Has been amended where reference is now given to requirements in Statutory Interpretations.
    • B703: Renamed as a “Guidance note” for medical oxygen.
    • B1104: Valid for ammonium nitrates only. Neither top wing tanks, deep tanks nor side tanks intended for oil are allowed adjacent to cargo holds intended for ammonium nitrates.
    • B1105: Changed to include all type of oil tanks adjacent to cargo holds.
    • Table D1: New entry: Direct reduced iron (C) (by-product, fines) added.

    • General: References to SOLAS Requirements, etc. made consistent throughout the section.

Pt.5 Ch.12 Comfort Class
Significant editorial changes adopted January 2010

Taking effect immediately

  • Sec.2 Noise and Vibration

    • In Sub-section element B400, it has been clarified that the requirements relates to passenger ships.

  • Sec.3 Indoor Climate

    • A new item B203 has been added for clarification and items A310, B106, C104, C105, C303 and C305 have been clarified.

Pt.6 Ch.1 Miscellaneous Notations
Main changes coming into force 1 January 2010

  • Sec.7 CRANE(N) – Verification for Compliance with Norwegian Shelf Regulations

    • A class notation CRANE(N) is introduced. The notation covers the technical requirements to comply with the “Norwegian Shelf Regulations for Cranes”.

Pt.6 Ch.13 Gas Fuelled Engine Installations
Main changes coming into force 1 July 2010

  • General

    • Interim Guidelines on Safety for Natural Gas-fuelled Engine Installations in Ships have been approved by IMO MSC.285(86) in June 2009. The Rules are aligned with these guidelines.

  • Sec.1 General Requirements
    • A documentation requirement for an overall design philosophy is added.
    • Documentation requirements changed to new format.
    • Some definitions updated in line with Interim Guidelines, changes later in document or general improvement.

    • The product certification requirements for valves are updated to be stricter and in line with Rules for Classification of Ships, Pt.5 Ch.5 for low temperature gas or high pressure gas.

  • Sec.2 Materials

    • Some material requirements are updated to better accommodate materials for CNG tanks, and to make the requirements less strict for low pressure and piping with working temperature above zero.

  • Sec.3 Arrangement and System Design
    • The requirements with regard to entrance to and location of compressor rooms are changed to be in line with Interim Guidelines. Compressor rooms can now be accepted below open deck if arranged as tank rooms, and with entrance directly from open deck or through air locks.
    • D100 General has got new content, and now contains a new requirement to give a better overall control with the design of redundant fuel supply and machinery installations due to shut down actions after gas leakages. The previous D100 General is moved to D200 and renamed Engine room configuration options.
    • A new sub-section “E Gas Supply System General” is added, collecting requirements from Sec.3 and Sec.6 regarding fuel supply system arrangement.
    • The requirement for excess flow shut down in Sec.6 D is re-written for better clarity and to make the different alternative solutions clearer, and moved to Sec.3 together with the rest of D101 to D106.
    • The design requirement for pipe duct is slightly revised to allow for an alternative calculation method for design pressure.
    • New requirements for emptying, inerting and gas freeing of gas tanks added in line with Interim Guidelines.
    • The wording for location of tanks is changed from “above” and “below deck” to “on open deck” and “in enclosed spaces”.
    • The requirement for location of tanks on open deck away from ship side is updated to be in line with the requirements for tanks located in enclosed spaces, hence opening for a location closer to the ship side for some ship types. Left out by mistake in previous revisions.
    • The requirements for location of CNG tanks and other gas tanks with pressure above 10 bar in enclosed spaces are updated in line with the Interim Guidelines. Now CNG can be located in enclosed spaces on certain conditions outlined in the rules.
    • The tank room arrangement requirement is slightly updated better accommodate the arrangement with a tank room arranged as a “cold box” welded to the outer shell of a double tank. In line with Interim Guidelines.
    • The bunkering station requirements are updated to better include CNG systems in addition to LNG systems, in line with Interim Guidelines.
    • The ventilation requirement for tank room is modified to allow for other alternative means for explosion prevention as an alternative to ventilation, in line with Interim Guidelines.
    • The ventilation requirement for ESD protected engine rooms is modified to allow for a lower rate in normal operation, in line with already enforced practice, and with Interim Guidelines.
    • Redundancy requirement for ventilation of pump and compressor room is added, in line with Interim Guidelines.
    • A new requirement containing safety requirements for spaces containing nitrogen generators or storage tanks is added. This is in line with similar requirements for chemical carriers and supply ships where nitrogen installations are common.

    • We have rearranged some of the requirements, by adding a new Sub-section, and moving requirements from Sec.3 G and Sec.6 D for better clarity of the rules.

  • Sec.4 Fire Safety

    • Some updates are done to bring the rules in line with similar requirements in the Interim Guidelines. Some requirements are moved to Sec.6.

  • Sec.5 Electrical Systems

    • Some updates are done to align with similar requirements in the Interim Guidelines. The main reason for these updates is to better include also CNG tank systems.

  • Sec.6 Control, Monitoring and Safety Systems
    • Some minor changes are done to align with the Interim Guidelines.
    • Some requirements are moved to Sec.3, and some are moved from Sec.3 and 4 to this section. Figures 1 and 2 are moved to Sec.3 and Table D1 is moved to B3.

    • The structure of the section is improved.

Pt.6 Ch.22 ENHANCED SYSTEM VERIFICATION (ESV)
Significant editorial changes adopted January 2010

Taking effect immediately

  • Sec.2 Hardware-in-the-loop Testing

    • Sub-section B has been amended in order to comply with standard principles for documentation requirement definitions.

Pt.6 Ch.24 Silent Class Notation
General
The Board approved this new chapter in December 2009.
The rules come into force on 1 January 2010.

Pt.6 Ch.25 Systems and Arrangement for meeting Regulations in Emission Control Areas (ECA)
General
The Board approved this new chapter in December 2009.
The rules come into force on 1 January 2010.

Pt.7 Ch.1 Survey Requirements
Main changes coming into force 1 January 2010

  • Sec.7 Optional Class Notation Surveys - Continued
    • Due to the deletion of special feature notation EL-1, the title of Sub-section element E300 has been amended.

    • A new sub-section H is inserted to cover the class notation SILENT-.

Main changes coming into force 1 July 2010

  • Sec.1 General Requirements
    • A117 amended providing a definition of substantial corrosion for ships built under the IACS Common Structural Rule.
    • A new item A202 is inserted dealing with commercial ships used for military operations.
    • B104 is amended related to survey planning.
    • B203 is amended with respect to the surveyors possibility for extended close up examination and extent of thickness measurements.
    • B401 is amended to cover:
      • air pipes on the exposed decks including heads and weld connection between air pipes and deck plating
      • vent piping systems including ventilators and closing devices

      • bunker piping systems.

  • Sec.2 Annual Surveys Extent - Main Class

    • B109 is amended to cover single and double hull chemical tankers.

  • Sec.3 Intermediate Surveys Extent - Main Class
    • B109 is amended to cover single and double hull chemical tankers.
    • B202 is amended with respect to the surveyor's possibility to require thickness measurements.

    • B400 is amended to cover single and double hull chemical tankers.

  • Sec.4 Renewal Surveys Extent - Main Class
    • B119 is amended to cover single and double hull chemical tankers.
    • A new item B122 with requirements for pressure testing and thickness measurements for chemical tankers over 10 years.
    • B202 and B303 is amended with respect to requirements for thickness measurements.
    • B402, B403, D500 and D600 is amended to cover single and double hull chemical tankers.

    • Tables D5.1, D5.2, D5.3, D6.1, D6.2 and D6.3 are extended to cover single and double hull chemical tankers.

  • Sec.6 Optional Class Notation Surveys

    • Sub-section element F100 is amended to cover the class notation CRANE(N).

  • Sec.7 Optional Class Notation Surveys - Continued

    • The sub-section covering PIMS-HULL has been removed.

  • Sec.8 Alternative Survey Arrangements

    • A new sub-section element B200 covering Hull PMS (Planned Maintenance Systems) has been inserted.

Significant editorial changes taking effect immediately

  • Sec.4 Renewal Surveys Extent - Main Class
    • Item C102 is amended.
    • In item C103 the requirements for examination of components in the steering systems has been removed.

    • Table E1 is amended; requirements for survey - Steering, has been removed and the definition of “evaporator” is clarified.

  • Sec.5 Miscellaneous Main Class Surveys
    • Items A302, B101 and B102 have been aligned with IACS UR Z3. Measurement of bearing clearance shall be performed on both oil and water lubricated stem tube bearings.
    • In item D104 requirements for oil sampling has been removed.

    • Item D106 has been amended.

  • Sec.6 Optional Class Notation Surveys
    • Sub-section A items A101, A207 and A208 is amended to cover the class notation Fire Fighter Capability.

    • Item U201 has been amended.

  • Sec.8 Alternative Survey Arrangements

    • In item C302 requirements for performance analysis has been removed.

Pt.8 Ch.1 Common Structural Rules for Double Hull Oil Tankers with Length 150 Metres and above
Main changes adopted January 2010 (Rule Change Notice 1)

Coming into force 1 February 2010

  • Sec.4 Basic Information
    • In item 3.2.5.1, a unit error in the formula and an error in the coefficient c1 in AC2 has been corrected.

    • A new item 3.4.3.6 has been added so that the connection area criteria consider the total plastic capacity of end connection in case of impact load.

  • Sec.8 Scantling Requirements
    • In Tables 8.2.1, 8.3.1, 8.4.1 and 8.5.1 the current minimum thickness requirements for keel, bottom shell and side shell plates are revised as follows:
      • a) Increase the minimum thickness requirements for keel, bottom shell and side shell for up to Tsc + 4.6 m by 1.0 mm.
      • b) Increase the minimum thickness requirement for side shell above Tsc + 4.6 m to the same as the requirements for “up to Tsc + 4.6 m”, i.e. there will be only one minimum thickness requirement for side shell.
      • c) Consequently, the current wording “hull envelop above Tsc + 4.6 m” is changed to “Upper deck” to cover only upper deck and to exclude the upper part of side shell.
    • In item 2.5.7.9 the requirement to thickness of inner bottom plate equal to thickness of corrugated has been deleted.
    • In item 2.6.8.1 there has been an upgrading of allowable buckling utilisation factors for cross ties.
    • In item 3.4.1.2 and 5.4.1.2 the requirements have been found redundant and thus deleted.

    • Item 3.4.3.2: The web depth of primary support members is not to be less than 2.5 times the depth of the slots. Does also apply for items 3.5.3.4, 3.6.3.4, 4.4.2.5, 4.6.3.4, 4.7.2.4, 5.4.3.2, 5.5.3.4 and 5.6.3.4.

  • Sec.9 Design Verification

    • In Table 9.2.2, there has been an upgrading of allowable utilisation factors against buckling.

  • Sec.10 Buckling and Ultimate Strength
    • In item 3.3.3.1 a formula has been corrected.

    • In item 3.5.1.3 and 3.5.1.4 a new paragraph has been added regarding buckling capacity for cross tie.

  • App.C Fatigue Strength Assessment
    • Item 1.4.5.14 has been clarified.
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