Help: GVM, Tare, Kerb Mass, Payload





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  1. #1
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    Question Help: GVM, Tare, Kerb Mass, Payload

    Please can the clever guys help me understand vehicle mass capacities.
    I need to know the difference between Keb Mass and Tare, as they are quoted as being different. Is the Kerb Mass without fluids and the Tare with fluids? If so how much fuel? With a full tank the diffence between Tare and Kerb Mass is too small.

    Payload seems to be the difference between Tare and Gross Vehicle Mass (GVM).

    If I am stopped at a weighbridge, what is my limit? I believe this to be the GVM.

    I have been told that installing uprated suspension does not increase your payload - that if you fit 400kg OME then after loading 400kg your vehicle will be at the same height as an empty vehicle with standard suspension. But payload remains as stated. Is this correct?

    I did a quick comparison between different vehicles from their specification on web sites and the image below is what I found:
    • The blanks are where the web site does not supply a figure.
    • The "Diff" column is the GVM-Kerb Mass
    • The Triton figures are from my owners manual. The web specs for the Triton give the Payload 903kg versus 1040kg in the manual. Also the web specs give the GCM as 4200kg. Maybe this is just because my model is 2007 and the web specs are for the latest model?
    I hope someone out there can confirm all this or correct me where I am confused.

    I hope I am creating this in the correct section. I have done a quick search and could not find anything so hope I am not duplicating.
    Attached Images Attached Images  
    Last edited by tritontitan; 2010/02/16 at 07:48 AM. Reason: coverted dysfunctional table to image
    Doug
    Pajero 3.5V6 SWB (Gen 3)
    Yes I had to sell my fantastic Triton
    Going to miss it dearly!

  2. #2
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    Hey Mods, Could this please be made into a sticky?

    This is a good question, goes hand in hand with all the towing info.
    New & Used Car Sales Exec.

  3. #3
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    Question Help please

    Guys, I am a bit surprised not to get more comment on this. Surely someone out there knows the real story? Please help if you can
    Doug
    Pajero 3.5V6 SWB (Gen 3)
    Yes I had to sell my fantastic Triton
    Going to miss it dearly!

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    Ok, here goes:

    "gross vehicle mass"

    in relation to a motor vehicle, means the maximum mass of such vehicle and its load as specified by the manufacturer thereof or, in the absence of such specification, as determined by the registering authority;


    "tare"

    in relation to a motor vehicle, means the mass of such vehicle ready to travel on a road and includes the mass of -
    a) any spare wheel and of all other accessories and equipment supplied by the manufacturer as standard for the particular model of motor vehicle concerned,
    b) anything which is a permanent part of the structure of such vehicle;
    c) anything attached to such vehicle so as to form a structural alteration of a permanent nature; and
    d) the accumulators, if such vehicle is self-propelled by electrical power, but does not include the mass of –
    i) fuel; and
    ii) anything attached to such vehicle which is not of the nature referred to in paragraph (b) or (c);


    "Kerb Mass" is not mentioned in the National Road Traffic Act, 1996
    Everything is a hammer.
    Unless it is a screw driver.

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    Here is all the definitions of the National road Act of 1996:

    "ambulance"

    means a motor vehicle specially constructed or adapted for the conveyance of sick or injured persons to or from a place for medical treatment and which is registered as an ambulance;

    "articulated motor vehicle"

    means a combination of motor vehicles consisting of a truck-tractor and a semi-trailer;

    "authorised officer"

    means an inspector of licences, examiner of vehicles, examiner for driving Iicences or traffic officer, and also any other person declared by the Minister by regulation to be an authorised officer, from time to time;

    "breakdown vehicle"

    means a motor vehicle designed or adapted solely for the purpose of recovering or salvaging motor vehicles and which is registered as a breakdown vehicle;

    "bridge"

    includes a culvert and a causeway;

    "builder"

    means any person who manufactures or assembles motor vehicles in whole or in part from used components, or modifies motor vehicles using new or used components;

    "bus"

    means a motor vehicle designed or adapted for the conveyance of more than 16 persons (including the driver, if any);

    "by-law"

    means a by-law issued under the laws of a province;

    "certification of roadworthiness"

    in relation to a motor vehicle, means certification of roadworthiness in terms of section 42;

    "chief executive officer"

    means the chief executive officer of the Corporation appointed in terms of section 15 of the Road Traffic Management Corporation Act, 1999;

    "combination of motor vehicles"

    means two or more motor vehicles coupled together;

    "Convention"

    means the International Convention relative to Motor Traffic (Paris, 1926), the United Nations Convention on Road Traffic (Geneva, 1949), or the United Nations Convention on Road Traffic (Vienna, 1968);

    "Corporation"

    means the Road Traffic Management Corporation established by section 3 of the Road Traffic Management Corporation Act,

    "cross"

    or any like expression, means to move on a public road in a direction which intersects the normal course of travel of traffic on such road;

    "dangerous goods"

    means the commodities, substances and goods listed in the standard specification of the South African Bureau of Standards SABS 0228 "The identification and classification of dangerous substances and goods;

    "Department"

    means the Department of Transport;

    "department of State"

    means a department as defined in section 1(1) of the Public Service Act, 1994 (Proclamation No. 103 of 1994);

    "Director-General"

    means the Director-General: Transport;

    "driver"

    means any person who drives or attempts to drive any vehicle or who rides or attempts to ride any pedal cycle or who leads any draught, pack or saddle animal or herd or flock of animals, and "drive" or any like word has a corresponding meaning;

    "driving licence"

    means a driving licence referred to in Chapter IV;

    "driving licence testing centre"

    means a driving licence testing centre referred to in Chapter IV;

    "edge of the roadway"

    means the boundary between the roadway and the shoulder, which is indicated by an appropriate road traffic sign, or in the absence of such sign -
    a) in the case of a road with a bituminous or concrete surface, the edge of such surface; or
    b) in the case of any other road, the edge of the improved part of the road intended for vehicular use;

    "examiner for driving licences"

    means an examiner for driving licences appointed and registered in terms of sections 3A and 3C, respectively;

    "examiner of vehicles"

    means an examiner of vehicles appointed and registered in terms of sections 3A and 3C, respectively;

    "fire-fighting vehicle"

    means a motor vehicle designed or adapted solely or mainly for fighting fires and which is registered as a fire-fighting vehicle;

    "freeway"

    means a public road or a section of a public road which has been designated as a freeway by an appropriate road traffic sign;

    "goods"

    means any movable property;

    "gross combination mass"

    in relation to a motor vehicle which is used to draw any other motor vehicle, means the maximum mass of any combination of motor vehicles, including the drawing vehicle, and load as specified by the manufacturer thereof or, in the absence of such specification, as determined by the registering authority;

    "gross vehicle mass"

    in relation to a motor vehicle, means the maximum mass of such vehicle and its load as specified by the manufacturer thereof or, in the absence of such specification, as determined by the registering authority;

    "identity document"

    means an identity document as defined in section 1 of the Identification Act, 1986 (Act No. 72 of 1986);

    "importer"

    means any person who imports new or used motor vehicles into the Republic;

    "inspector of licences"

    means an inspector of licences appointed and registered in terms of [the laws of any province] sections 3A and 3C, respectively;

    "instructor"

    means any person who for direct reward -
    a) instructs any other person in the driving of a motor vehicle;
    b) teaches any other person the rules of the road or road traffic signs in order to obtain a learner’s or a driver’s licence;

    "international driving permit"

    means an international driving permit issued in terms of a Convention or recognised thereunder;

    "kerb line"

    means the boundary between the shoulder and the verge or, in the absence of a shoulder, the part between the edge of the roadway and the verge;

    "learner's licence"

    means a learner's licence referred to in Chapter IV;

    "local authority"

    means a transitional metropolitan substructure, transitional local council or local government body contemplated in section 1(1) of the Local Government Transition Act, 1993 (Act No. 209 of 1993);

    "manufacturer"

    means a person who manufactures or assembles new motor vehicles;

    "manufacturer of number plates"

    means a person who, for the purpose of selling number plates, manufactures number plates;

    "MEC"

    means a member of the Executive Council appointed in terms of section 132 of the Constitution of the Republic of South Africa, 1996 (Act No. 108 of 1996), and who is responsible for road traffic matters, or any other person authorised by him or her to exercise any power or perform any duty or function which such MEC is empowered or obliged to exercise or perform in terms of this Act;

    "medical practitioner"

    means any person registered as such in terms of the Medical, Dental and Supplementary Health Service Professions Act, 1974 (Act No. 56 of 1974);

    "Minister"

    means the Minister of Transport, or any other person authorised by him or her to exercise any power or perform any duty or function which such Minister is empowered or obliged to exercise or perform in terms of this Act;

    "motor cycle"

    means a motor vehicle which has two wheels and includes any such vehicle having a side-car attached;

    "motor dealer"

    means any person who is engaged in the business of buying, selling, exchanging or repairing motor vehicles required to be registered and licensed in terms of this Act or of building permanent structures onto such vehicles and who complies with the prescribed conditions;

    "motor quadrucycle"

    means a motor vehicle, other than a tractor, which has four wheels and which is designed to be driven by the type of controls usually fitted to a motor cycle;

    "motor tricycle"

    means a motor vehicle, other than a motor cycle or a tractor, which has three wheels and which is designed to be driven by the type of controls usually fitted to a motor cycle;

    "motor vehicle"

    means any self-propelled vehicle and includes –
    a) a trailer; and
    b) a vehicle having pedals and an engine or an electric motor as an integral part thereof or attached thereto and which is designed or adapted to be propelled by means of such pedals, engine or motor, or both such pedals and engine or motor, but does not include –
    i) any vehicle propelled by electrical power derived from storage batteries and which is controlled by a pedestrian; or
    ii) any vehicle with a mass not exceeding 230 kilograms and specially designed and constructed, and not merely adapted, for the use of any person suffering from some physical defect or disability and used solely by such person;

    "number plate"

    means a prescribed plate on which the licence number of a motor vehicle or motor trade number is displayed;

    "operate on a public road"

    or any like expression, in relation to a vehicle, means to use or drive a vehicle or to permit a vehicle to be used or driven on a public road, or to have or to permit a vehicle to be on a public road;

    "operator"

    means the person responsible for the use of a motor vehicle of any class contemplated in Chapter VI, and who has been registered as the operator of such vehicle;

    "owner"

    in relation to a vehicle, means -
    a) the person who has the right to the use and enjoyment of a vehicle in terms of the common law or a contractual agreement with the title holder of such vehicle;
    b) any person referred to in paragraph (a), for any period during which such person has failed to return that vehicle to the title holder in accordance with the contractual agreement referred to in paragraph (a); or
    c) a motor dealer who is in possession of a vehicle for the purpose of sale, and who is registered as such in accordance with the regulations under section 4, and "owned" or any like word has a corresponding meaning;

    "park"

    means to keep a vehicle, whether occupied or not, stationary for a period of time longer than is reasonably necessary for the actual loading or unloading of persons or goods, but does not include any such keeping of a vehicle by reason of a cause beyond the control of the person in charge of such vehicle;

    "peace officer"

    means a traffic officer and also a traffic warden appointed in terms of section 3A;

    "Pedal cycle"

    means any bicycle or tricycle designed for propulsion solely by means of human power;

    "prescribe"

    means prescribe by regulation;

    "prescribed territory"

    means -
    a) the Kingdom of Lesotho, the Kingdom of Swaziland, the Republic of Angola, the Republic of Botswana, the Republic of Malawi, the Republic of Mozambique, the Republic of Namibia, the Republic of Zambia and the Republic of Zimbabwe; and
    b) any other state or territory declared by the Minister by notice in the Gazette to be a prescribed territory;

    "professional driver"

    means the driver of a motor vehicle [in respect of which an operator is registered] referred to in section 32;

    "Professional driving permit"

    means a professional driving permit referred to in Chapter IV;

    "Province"

    means a province referred to in section 103 of the Constitution of the Republic of South Africa, 1996;

    "public road"

    means any road, street or thoroughfare or any other place (whether a thoroughfare or not) which is commonly used by the public or any section thereof or to which the public or any section thereof has a right of access, and includes -
    a) the verge of any such road, street or thoroughfare,
    b) any bridge, ferry or drift traversed by any such road, street or thoroughfare; and
    c) any other work or object forming part of or connected with or belonging to such road, street or thoroughfare;

    "registering authority"

    means a registering authority appointed as such in accordance with section 3;

    "registration plate"

    deleted by the National Road Traffic Amendment Act, 1998

    "regulation"

    means a regulation under this Act;

    "repealed ordinance"

    means an ordinance or any provision of an ordinance repealed by the Road Traffic Act, 1989 (Act No. 29 of 1989);

    "rescue vehicle"

    means a motor vehicle designed or adapted solely for the purpose of rescuing persons, and which is owned or controlled by a department of State, a local authority or a body approved by the MEC concerned and is registered as a rescue vehicle;

    "road traffic ordinance"

    means the Road Traffic Ordinance, 1966 (Ordinance No. 21 of 1966), of the former Transvaal, Natal, the Orange Free State and the Cape of Good Hope, respectively;

    "road traffic sign"

    means a road traffic sign prescribed under section 56;

    "roadway"

    means that portion of a road, street or thoroughfare improved, constructed or intended for vehicular traffic which is between the edges of the roadway;

    "roadworthy"

    in relation to a vehicle, means a vehicle which complies with the relevant provisions of this Act and is otherwise in a fit condition to be operated on a public road;

    "roadworthy certificate"

    in relation to a motor vehicle, means a certificate issued in terms of section 42;

    "semi-trailer"

    means a trailer having no front axle and so designed that at least 15 per cent of its tare is super-imposed on and borne by a vehicle drawing such trailer;

    "Shareholders Committee"

    means the Shareholders Committee established by section 6 of the Road Traffic Management Corporation Act,

    "shoulder"

    means that portion of a road, street or thoroughfare between the edge of the roadway and the kerb line;

    "sidewalk"

    means that portion of a verge intended for the exclusive use of pedestrians;

    "South African Bureau of Standards"

    means the South African Bureau of Standards referred to in section 2(1) of the Standards Act, 1993 (Act No. 29 of 1993);

    "stop"

    means the bringing to a standstill of a vehicle by the driver thereof;

    "tare"

    in relation to a motor vehicle, means the mass of such vehicle ready to travel on a road and includes the mass of -
    a) any spare wheel and of all other accessories and equipment supplied by the manufacturer as standard for the particular model of motor vehicle concerned,
    b) anything which is a permanent part of the structure of such vehicle;
    c) anything attached to such vehicle so as to form a structural alteration of a permanent nature; and
    d) the accumulators, if such vehicle is self-propelled by electrical power, but does not include the mass of –
    i) fuel; and
    ii) anything attached to such vehicle which is not of the nature referred to in paragraph (b) or (c);

    "testing station"

    means a testing station registered in terms of section 39;

    "this Act"

    includes the regulations;

    "title holder"

    in relation to a vehicle, means -
    a) the person who has to give permission for the alienation of that vehicle in terms of a contractual agreement with the owner of such vehicle; or
    b) the person who has the right to alienate that vehicle in terms of the common law, and who is registered as such in accordance with the regulations under section 4;

    "tractor"

    means a motor vehicle designed or adapted mainly for drawing other vehicles and not to carry any load thereon, but does not include a truck-tractor;

    "traffic officer"

    means a traffic officer appointed in terms of section 3A, and any member of the Service, and any member of a municipal police service, both as defined in section 1 of the 45 South African Police Service Act, 1995 (Act No. 68 of 1995), and for the purposes of Chapters V, IX and X and sections 74 and 78 of this Act, includes a peace officer;

    "trailer"

    means a vehicle which is not self-propelled and which is designed or adapted to be drawn by a motor vehicle, but does not include a side-car attached to a motor cycle;

    "Transnet Limited"

    means the company floated and incorporated in terms of section 2 of the Legal Succession to the South African Transport Services Act, 1989 (Act No. 9 of 1989);

    "truck-tractor"

    means a motor vehicle designed or adapted -
    a) for drawing other vehicles; and
    b) not to carry any load other than that imposed by a semi-trailer or by ballast, but does not include a tractor;

    "urban area"

    means that portion of the area of jurisdiction of a local authority which has by actual survey been subdivided into erven or is surrounded by surveyed erven, and includes the public roads abutting thereon;

    "vehicle"

    means a device designed or adapted mainly to travel on wheels or crawler tracks and includes such a device which is connected with a draw-bar to a breakdown vehicle and is used as part of the towing equipment of a breakdown vehicle to support any axle or all the axles of a motor vehicle which is being salvaged other than such a device which moves solely on rails; and

    "verge"

    means that portion of a road, street or thoroughfare, including the sidewalk, which is not the roadway or the shoulder.
    Everything is a hammer.
    Unless it is a screw driver.

    Then it it a chisel.

  6. #6
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    Uys, thanks for the fast response.
    Is this statement also correct? I have been told that installing uprated suspension does not increase your payload - that if you fit 400kg OME then after loading 400kg your vehicle will be at the same height as an empty vehicle with standard suspension. But payload remains as stated.
    Doug
    Pajero 3.5V6 SWB (Gen 3)
    Yes I had to sell my fantastic Triton
    Going to miss it dearly!

  7. #7
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    Quote Originally Posted by tritontitan View Post
    Is this statement also correct? I have been told that installing uprated suspension does not increase your payload - that if you fit 400kg OME then after loading 400kg your vehicle will be at the same height as an empty vehicle with standard suspension. But payload remains as stated.
    That is correct!
    Everything is a hammer.
    Unless it is a screw driver.

    Then it it a chisel.

  8. #8
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    Thanks Uys - glad to see you back!

    My understanding is that your vehicle is licensed for the gross vehicle mass as appears on the manufacturer's spec. Even if you installed uprated springs and axles and brackets to make it capable of carrying 3 times the weight, you can only carry what the vehicle is licensed to carry. I have heard you can have the vehicle relicensed with a new GVM but hate to think how that processes might go.

    I wonder how it works with the Amarok that has the option to install uprated suspension thus increasing the payload?
    Doug
    Pajero 3.5V6 SWB (Gen 3)
    Yes I had to sell my fantastic Triton
    Going to miss it dearly!

  9. #9
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    Quote Originally Posted by tritontitan View Post
    Even if you installed uprated springs and axles and brackets to make it capable of carrying 3 times the weight, you can only carry what the vehicle is licensed to carry.
    Upgrading the springs is just one component. The force still go through the chassis and the axles, and they are untouched.
    Everything is a hammer.
    Unless it is a screw driver.

    Then it it a chisel.

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