ﻫﻴﺌﺔ ﺍﻟﺘﻘﻴﻴﺱ  ﺍﻟﻌﺭﺒﻴﺔ ﺍﻟﺨﻠﻴﺞ ﻟﺩﻭل ﺍﻟﺘﻌﺎﻭﻥ  ﻤﺠﻠﺱ  ﻟﺩﻭل    
STANDARDIZATION ORGANIZA TION FOR G.C.C (GSO)   
  
  
  
  
  
  
  
  
  
  
  
  
GSO 37/200… 
Revised 
 
 
 
  
 ﺍﻟﺴﻴﺎﺭﺍﺕ–ﺍﻟﺼﺩﻤﺎﺕ  ﺘﺤﻤل ﺍﺨﺘﺒﺎﺭ ﻁﺭﻕ   
ﺍﻟﺜﺎﻨﻲ ﺍﻟﺠﺯﺀ:  ﺍﻟﻤﺘﺤﺭﻙ  ﺒﺎﻟﺼﺎﺩﻡ  ﺍﻟﺨﻠﻔﻴﺔ  ﺍﻟﺼﺩﻤﺔ   
MOTOR VEHICLES 
METHODS OF TEST FOR IMPACT STRENGTH 
PART 2:  MOVING BARRIER REAR IMPACT  
  
  
  
 
 
 
 
 
 
 
 
ICS:43.020   
  
  
  
  
 
  
  
MOTOR VEHICLES 
METHODS OF TEST FOR IMPACT STRENGTH 
PART 2:  MOVING BARRIER REAR IMPACT 
  
  
  
  
  
  
  
  
  
Date of GSO Board of Directors Approval : 
Issuing status :Technical Regulation 
 
  
  
  
  
  
 
 
 
 
 
 
 
 
 GSO 37/200…. GSO STANDARD
  
Foreword 
 
Standardization Organization for GCC (GSO) is a regional Organization which consists of the 
National Standards Bodies of GCC member Stat es. One of GSO main functions is to issue 
Gulf Standards /Technical regulation through specialized technical committees (TCs). 
GSO through the technical program of co mmittee TC No.2" Technical Committee of 
Mechanical standards " has updated the GSO Standard No. GSO 37/1994 " Motor Vehicles 
Methods Of Test for Impact Strength Part 2:  Moving Barrier Rear Impact "  . The Draft 
Standard has been prepared by Kingdom of Saudi Arabia 
This standard has been approved as Gulf Tec hnical Regulation by GSO Board of Directors in 
its meeting No. 4 held on 25/10/1426 (27/11/2005)  The approved standard will replace and 
supersede the standard No. ( GSO 37/200…). 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1GSO 37/200…. GSO STANDARD
  
MOTOR VEHICLES 
METHODS OF TEST FO R IMPACT STRENGTH 
PART 2:  MOVING BA RRIER REAR IMPACT 
  
  
1- SCOPE AND FIELD OF APPLICATION 
 This standard is concerned with the method of test for the rear impact strength of 
passenger cars multi-purpose passenger vehicles, trucks and buses with GVW less 
than 4500 kg using the moving barrier.  
  
2- COMPLEMENTARY REFERENCES 
2.1 GSO 36/2005 “Motor Vehicles - Methods of Test for Impact Strength - Part 1:  
Frontal Impact”. 
2.2 GSO 38/2005 “Motor Vehicles - Methods of  Test for Impact Strength - Part 3A:  
Side Impact”. 
2.3 GSO 1707/2005 “Motor Vehicles - Methods of Test for Impact Strength - Part 
3B: Moving Barrier Side Impact”. 
2.4 GSO 1708/2005 “Motor Vehicles - Methods of Test for Impact Strength - Part 
3C: Moving Barrier Side Impact”. 
2.5 GSO 39/2005 “Motor Vehicles - Methods of Test for Impact Strength - Part 4:  
Roof Strength”. 
2.6 GSO 40/200… (Revised)   “Motor  Vehicles - Impact Strength”.  
  
3- MEASURING INSTRUMENTS 
3.1 Speed measuring device:  It  shall permit measurement of speed to an accuracy of 
(± 1)% of its reading. 
3.2 Time measuring instrument:  It shall permit measurement of time to an accuracy 
of (± 0.001) second. 
3.3 Cinematographic camera:  Its speed sh all be from 200 to 1000 images per second. 
3.4 Dimensions measuring instrument:  It shall permit measuremen t of length to an 
accuracy of ( ± 5)% of its reading. 
  
4- TEST CONDITIONS (A) 
 The following shall be met: Fuel Spillage Measurement for passenger cars, 
multipurpose passenger vehicles, trucks and buses having a GVW less than 4500 
kg.  The requirements of items 4 and 5 do not apply to vehicles meeting the 
requirements of items 6 and 7 or 8 and 9 . 
 2GSO 37/200…. GSO STANDARD
  
4.1 Test site 
4.1.1 The test site shall be of sufficient  area to provide for accommodation of the 
instruments, and for the attaining of th e desired velocity by the moving barrier. 
4.1.2 It shall have a horizontal section of hard  standing, straight an d at least 15 m long, 
which shall not slope from the horizontal by more than 3o over any one meter 
length of the path of the moving barrier. 
4.1.3 Provision shall be made so that the test  car remains on the hard surface of track 
during the total time of test. 
4.1.4 It shall be equipped with means to move the impact barrier at the specified 
velocity, without deviation from its path, until impact. 
4.2 Moving impact barrier (Fig. 1) 
4.2.1 Its total weight shall not exceed (1814 ± 23) kg, distributed by its front and rear 
axles so that their loadings are: 
 Front:  (60 ± 10)% of its load 
 Rear :  (40 ± 10)% of its load 
4.2.2 It shall be of rigid construction, and sy mmetrical about a  longitudinal vertical 
plane, it shall be fitted with wheels of fixed non-steerable fr ont and rear axles, 
attached directly to the fr ame rail, without springs or other type of suspension 
system absorbing impacts or shocks. 
4.2.3 The impact barrier shall be  provided with braking sy stem to prevent it from 
making any other impact with the test vehicle after carrying out the initial impact. 
4.2.4 The height of the impact front surface of the barrier shall be 1524 mm and its 
width shall be 1981 mm; the ground clearance to the lower edge of the impact 
surface shall be 127 mm; the impact surf ace shall be covered with plywood (20 ± 
2) mm thick. 
4.2.5 Height of centre of gravity  :  (400 ± 40) mm 
 Track     :  (1500 ± 30) mm 
 Wheelbase    :  (3050 ± 60) mm  
 The pneumatic tyres shall be inflated to (197 ± 30)KPa. 
4.2.6 The edges of the surfaces shall be rounde d with a radius of curvature of (45 ± 10) 
mm. 
4.3 Test vehicle 
4.3.1 The vehicle shall be loaded with the weights corresponding to the kerb load, each 
standing in its located place. 
 3GSO 37/200…. GSO STANDARD
  
  
 
Fig. 1  Moving Barrier Rear Impact 
 4GSO 37/200…. GSO STANDARD
  
4.3.2 The fuel tank shall be filled to at leas t 90% of its capacity with a liquid having a 
density of a fuel normally used. 
4.3.3 The transmission arm shall be in neutral position. 
  
5- TEST PROCEDURE (A) 
5.1 The barrier shall be moved to impact the vehicle and the following shall be met: 
5.1.1 The longitudinal plane of the vehicle sha ll be perpendicular to  the impact surface 
of the moving barrier within (±  2)o. 
5.1.2 The lateral misalignment between the medi an longitudinal vertical plane of the 
test vehicle and the median longitudinal vertical plane of the impact surface of the 
moving barrier, shall not exceed 150 mm. 
5.1.3 The speed of the barrier at the moment of impact with the vehicle, shall be 48 
km/h. 
5.1.4 At the moment of impact, the moving barrier shall be disconnected from any 
external propulsion, and/or guidance system. 
5.1.5 The attachment of the moving barrier to any external propulsion or guidance 
system, shall not affect the charac teristics of the moving barrier. 
5.2 The liquid spillage from the fuel tank and fuel system, from the moment of impact 
to cessation of movement of the barrier and the vehi cle, and during the five 
minutes period following their cessation, shall be measured.  Also for the 
subsequent period of 25 minutes the fuel spillage shall be measured. 
  
6- TEST CONDITIONS (B) 
 The following shall be met (Displacement of the Vertical Projection of the rear 
seat R-point):  for passenger cars and multi-purpose passenger vehicles, and (at the manufacturer’s choice) to trucks a nd buses.  The requirements of items 6 and 
7 do not apply to vehicles which meet  the requirements of items 4 and 5 or 8 and 
9 having a GVW less than 4500 kg. 
6.1 Test Site 
6.1.1 The test area shall be large enough to accommodate the impactor propulsion 
system and to permit after - impact di splacement of the vehicle impacted and 
installation of the test equipment. 
6.1.2 The part in which vehicle impact and di splacement occur shall be horizontal, flat 
and smooth and have a coefficient of friction of not less than 0.5. 
6.2 Moving impact barrier 
6.2.1 The impactor shall be of steel and of rigid construction. 
6.2.2 The impacting surface shall be flat, not less than 2,500 mm  wide, and 800 mm 
high. 
6.2.3 Its edges shall be rounded to a radius of curvature of between 40 and 50 mm.   
6.2.4 It shall be clad with a layer of plywood 20 mm thick. 
 5GSO 37/200…. GSO STANDARD
  
6.2.5 The impactor shall be secu red to the moving barrier. 
6.2.5.1 When the impactor is secured to a car riage (moving barrier) by a restraining 
element, the latter must be rigid and be incapable of being deformed by the 
impact. 
6.2.5.2 The carriage shall at the moment of impact be capab le of moving freely and no 
longer be subject to the acti on of the propelling device. 
6.2.5.3 The aggregate weight (mass) of carriage and impactor shall be (1,100 ± 20) kg. 
6.3 Test vehicle 
6.3.1 The vehicle under test shall either be f itted with all the normal components and 
equipment included in its unlad en kerb weight or be in such condition as to fulfil 
this requirement so far as the compone nts and equipment of concern to the 
passenger compartment and the distribution of the weight of the vehicle as a 
whole, in running order, are concerned. 
6.3.2 The fuel tank shall be filled to at leas t 90% of its capacity with a liquid having a 
density close to that of the fuel normally  used.  All other systems (brake-fluid, 
header tanks, radiator, etc.) may be empty. 
6.3.3 A gear shall be engaged and the brakes shall be applied. 
  
7- TEST PROCEDURE (B) 
7.1 The moving impact barrier shall be move d to impact the vehicle and the following 
shall be met: 
7.1.1 The impacting surface shall be verti cal and perpendicula r to the median 
longitudinal plane of the impacted vehicle. 
7.1.2 The direction of movement of the impact or shall be substan tially horizontal and 
parallel to the median longitudinal plane of the impacted vehicle. 
7.1.3 The maximum lateral deviati on tolerated between the medi an vertical line of the 
surface of the impactor and the median l ongitudinal plane of the impacted vehicle 
shall be 300 mm.   
7.1.4 The impacting surface shall extend over the entire width of the impacted vehicle. 
7.1.5 The ground clearance of the lower edge  of the impacting surface shall be 175 ± 25 
mm. 
7.1.6 The speed of the barrier at the moment  of impact with the vehicle shall be 
between 35 and 38 km/h. 
7.1.7 At the moment of impact, the moving barrier shall be disconnected from any 
external populsion and/or guidance system. 
  
8 TEST CONDITIONS (C) 
                   The following shall be met: Fuel Spillage Measurement for passenger cars, 
multipurpose passenger vehicles, trucks and buses having a GVW less than 4500 
kg.  The requirements of items 8 and 9 do not apply to vehicles meeting the 
requirements of items 4 and 5 or 6 and 7  
 6GSO 37/200…. GSO STANDARD
  
8.1 Test site 
8.1.1 The test site shall be of sufficient  area to provide for accommodation of the 
instruments, and for the attaining of  the desired velocity by the moving 
deformable barrier. 
8.1.2 It shall have a horizontal section of hard  standing, straight an d at least 15 m long, 
which shall not slope from the horizontal by more than 3o over any one meter 
length of the path of the moving barrier. 
8.1.3 Provision shall be made so that the test  car remains on the hard surface of track 
during the total time of test. 
8.1.4 It shall be equipped with means to move the impact barrier at the specified 
velocity, without deviation from its path, until impact. 
8.2 Moving impact deformable barrier (Fig. 2) 
8.2.1          The total mass shall be (1367 ± 4.5) kg. 
8.2.2 The track width shall be (1870 ± 30) mm. 
8.2.3 The wheelbase shall be (2590 ± 10) mm. 
8.2.4 The centre of gravity shall be situated in the median longitudinal vertical plane 
within (7.6 ± 2.5) mm, (1120 ± 30) mm behind the front axle and (500 ± 25) mm 
above the ground. 
8.2.5 The deformable face of the barrie r shall be mounted on the barrier. 
8.2.6 The distance between the front face of th e impactor and the centre of gravity of 
the barrier shall be (2160 ± 30) mm. 
8.2.7 The ground clearance of the collision zone shall be (235 ± 5) mm measured in 
static condition before impact. 
8.2.8 The material of the impactor shall be  an aluminum honeycomb or any other 
material can be used. 
8.2.9 The moving barrier shall be equipped with  a suitable device to prevent a second 
impact on the struck vehicle. 
        
8.3 Test Vehicle 
8.3.1 The passenger car shall be loaded with the weights corr esponding to the kerb load 
plus rated cargo and luggage capacity weight, and the test dummies each standing 
in its located place. 
8.3.2 The Multipurpose passenger ve hicle, truck, or bus shall be loaded with the weight 
corresponding to the kerb load, plus th e test dummies, plus 136kg or its rated 
cargo and luggage capacity we ight whichever is less . 
8.3.3 The fuel tank shall be filled to any leve l from 90 to 95% of its capacity with a 
liquid having a density close to that of the fuel normally  used (Stoddard solvent). 
8.3.4 The fuel system other than fuel tank sha ll be filled with the sa me fuel mentioned  
in item 8.3.3 to its normal operating level. 
 7GSO 37/200…. GSO STANDARD
  
8.3.5 The parking brake shall be disengaged and the transmission shall be in neutral. 
 
 
 
 
Fig.   Moving Impact Deformable Barrier 2
 
 
 
 8GSO 37/200…. GSO STANDARD
  
 
9.0 Test Procedure 
9.1 The deformable barrier shall be moved to impact the vehicle and the following 
shall be met: 
9.1.1 The barrier impacts the test vehicle with the longitudinal center line of the vehicle 
parallel to the line of travel and perpendi cular to the barrier face within a tolerance 
of ± 5 degrees. 
9.1.2 The test vehicle and barrier face are aligned so that the barrier strikes the rear of 
the vehicle with 70 percent overlap toward either side of the vehicle. So aligned, 
the barrier face fully engages one half of  the rear of the vehicle and partially 
engages the other half.  
9.1.3 At impact, the vehicle's longitudinal center line is located inboard either of the side 
edges of the barrier by a distance equal to 20 percent of the vehicle's width± 50 
mm (see Figure 3).  
9.1.4 The vehicle's width shall be the maximum dimension measured across the widest 
part of the vehicle, including bump ers and molding, but excluding such 
components as exterior mirro rs, flexible mud flaps, marker lamps, and dual rear 
wheel configurations. 
9.1.5 The speed of the barrier at the moment of  impact with the vehicle shall be 80±1.0 
km/h. 
9.1.6 At the moment of impact, the moving barrier shall be disconnected from any 
external propulsion, and/or guidance system. 
9.1.7 The attachment of the moving barrier to any external propulsion or guidance 
system, shall not affect the charac teristics of the moving barrier. 
9.2 The liquid spillage from the fuel tank and fuel system, from the moment of impact 
to cessation of movement of the barrier and the vehi cle, and during the five 
minutes period following their cessation, shall be measured.  Also for the 
subsequent period of 25 minutes the fuel spillage shall be measured. 
 
 9GSO 37/200…. GSO STANDARD
  
 
 
10- RESULTS 
10.1 Result (Procedure A) 
10.1.1 The amount of fuel leaked out. 
10.2 Result (Procedure B) 
10.2.1 At the end of the impact test the l ongitudinal displacement  of the vertical 
projection of the floor of the “R” point of the vehicle’s rearmost seat shall be 
determined and checked with the requirement. 
10.2.2 Check any doors left opened after the test. 
10.2.3 Check any rigid components  that can cause injury. 
10.2.4 The easy opening of the doors after th e test without the use of tools. 
10.3 Result (Procedure C) 
10.3.1 The amount of fuel leaked out 
  
11- TEST REPORT 
 The test report shall include the following information: 
11.1 Test Report (A) 
11.1.1 Description of test vehicle. 
11.1.2 Load of test vehicle. 
11.1.3 Load of barrier. 
 10GSO 37/200…. GSO STANDARD
  
11.1.4 Barrier speed at the moment of impact. 
11.1.5 Location of test devices. 
11.1.6 Lateral misalignment of barrier. 
11.1.7 Angle of impact. 
11.1.8 Type of test carried out. 
11.1.9 The amount of liquid spillage from  the fuel tank and fuel system. 
11.1.10 Date of test.  
11.2 Test Report (B) 
11.2.1 Description of test vehicle. 
11.2.2 Load of test vehicle. 
11.2.3 Load of barrier. 
11.2.4 Barrier speed at the moment of impact. 
11.2.5 Location of test devices. 
11.2.6 Lateral misalignment of barrier. 
11.2.7 Angle of impact. 
11.2.8 Type of test carried out. 
11.2.9 The longitudinal displacement of the floor of the tested vehicle. 
11.2.10 The amount of liquid spillage from  the fuel tank and fuel system. 
11.2.11 Date of test.  
11.3 Test Report (C) 
11.3.1 Description of test vehicl e and category of vehicle 
11.3.2 Load of test vehicle (GVW) 
11.3.3 Width of the vehicle  
11.3.4 Load of barrier. 
11.3.5 The distance between the front face of  the barrier and its  center of gravity 
11.3.6 Barrier speed at the moment of impact. 
11.3.7 Location of test devices. 
11.3.8 Lateral misalignment of barrier. 
11.3.9 Angle of impact. 
11.3.10 The percentage of overlap 
11.3.11 The amount of liquid spillage from  the fuel tank and fuel system. 
11.3.12 Date of test.  
 
  
 
 11GSO 37/200…. GSO STANDARD
  
 
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