QC/T 948-2013 Roof load carriers for road vehicles
1 Scope
This standard specifies the terms and definitions, category code requirements, test methods, inspection rules, markings, instructions, packaging, transportation, and storage of roof load carriers for road vehicles.
This standard is applicable to load carriers installed on the exterior of Type M1 and Type G road vehicles, hereinafter referred to as "roof load carriers".
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 191 Packaging - Pictorial marking for handling of goods (GB/T 191-2008, ISO 780: 1997, MOD)
GB/T 700 Carbon structural steels
GB/T 1040 (all) Plastics - Determination of tensile properties - Part 2: Test conditions for moulding and extrusion plastics [ISO 527 (all), IDT]
GB/T 1043.1-2008 Plastics - Determination of charpy impact properties - Part 1: Non-instrumented impact test (ISO 179-1: 2000, IDT)
GB 1589 Limits of dimensions, axle load and masses for road vehicles
GB/T 1766 Paints and varnishes - Rating schemes of degradation of coats
GB/T 1865 Paints and varnishes - Artificial weathering and exposure to artificial radiation - Exposure to filtered xenon-arc radiation (GB/T 1865-1997, ISO 11341: 1994, EQV)
GB/T 3190 Chemical composition of wrought aluminium and aluminium alloys (GB/T 3190-2008, ISO 209: 2007, MOD)
GB/T 6461-2002 Methods for corrosion testing of metallic and other in organic coatings on metallic substrates - Rating of test specimens and manufactured articles subjected to corrosion tests (ISO 10289: 1999, IDT)
GB/T 7762 Rubber, vulcanized or thermoplastic - Resistance to ozone cracking - Static strain testing (GB/T 7762-2003, ISO 1431-1: 1989, MOD)
GB/T 10125-1997 Corrosion tests in artificial atmospheres - Salt spray tests (ISO 9227: 1990, EQV)
GB 11566 External projections for passenger car (ECE R26-2007, MOD)
GB/T 16422.2 Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc sources (GB/T 16422.2-1999, ISO 4892-2: 1994, IDT)
GB/T 20878 Stainless and heat-resisting steels - Designation and chemical composition
ISO 6487 Road vehicles - Measurement techniques in impact test - Instrumentation
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
roof load carrier
device for loading objects on the outer roof of a car
3.2
roof rack
specific purpose roof device having its own fixation to the vehicle designed to carry a load on the roof of a vehicle
3.3
roof bar
supporting bar with connecting devices which enables a load to be carried on the roof of a vehicle
3.4
bicycle carrier
device intended for carrying bicycle(s) on roof bars
3.5
bicycle-wheel carrier
device intended for carrying bicycle wheel(s) on roof bars, roof decks or roof racks
3.6
ski and/or snow-board carrier
device intended for carrying ski(s), snow-board(s) and/or sticks on roof bars, roof decks or roof racks
3.7
sailboard and/or surfboard carrier
any device intended for carrying sailboard(s) with or without mast and boom and/or surfboard(s) on roof bars, roof decks or roof racks
3.8
sailboard mast carrier
device intended for carrying sailboard mast(s) on roof bars, roof decks or roof racks
3.9
roof container
containers intended for the transport of different loads such as suit-cases, bags, skis, etc. on roof bars, roof decks or roof racks, as illustrated in Figure 1
3.10
canoe and/or kayak carrier
device intended for carrying canoe(s) and/or kayak on roof bars, roof decks or roof racks
3.11
roof deck (basket)
basket device or platform intended for carrying different loads such as suit-cases, bags, skis and/or roof deck, as illustrated in Figure 2
Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Category coding 5 Requirements 6 Test methods 7 Inspection rules 8 Marking, instructions, packaging, transportation, and storage Annex A (Normative) Test bench Annex B (Normative) Test devices and test box Annex C (Nominative) Tightening torques for fastening roof load carriers Annex D (Nominative) Crash test Annex E (Normative) Dynamic test Annex F (Normative) Static test Annex G (Normative) Specific roof container tests Annex H (Informative) Example for safety instructions in the instruction for use Annex I (Informative) Determination of allowable additional mass Annex J (Nominative) Instructions for the construction of the "Belgian Block" test track Annex K (Normative) Force application Annex L (Normative) Measurement of deflection Annex M (Informative) Comparison between this standard and ISO/PAS 11154:2006 in terms of clause/subclause numbers
图3 固定物体装置 3.14 车辆顶部最大承载量 maximum vehicle roof load 最大承载质量，车辆制造商规定的在车辆顶部上的承载限量，代号为md，单位为kg。 3.15 车顶装载装置最大装载量 maximum roof carrier load 最大装载质量或装载数量，装置制造商规定的在装置上的装载限量，代号为mb，单位为kg或数量单位。 3.16 特定车顶装载装置质量 mass of the specific roof device set 设计成装载特定物体或通过自身与车辆进行固定的车顶装载装置中所有组件的质量之和，代号为me mdev，单位为kg。 3.17 车顶装载装置质量 mass of set of roof load carrier device 整套车顶装载装置的总质量，代号为me，单位为kg。 3.18 理论最大装载量 theoretical maximum load 为车辆顶部最大承载量md减去车顶装载装置质量me或减去特定车顶装载装置质量me mdev的差值，代号为mn，单位为kg。 3.19 实际最大装载量 actual maximum load 为理论最大装载量mn或车顶装载装置最大装载量mb中的最小者，代号为mx，单位为kg。 3.20 升力 lifting force 在测试中，用来模拟风力作用的垂直分量和/或由载物作用产生的垂直力，代号为Fa，单位为N。 3.21 向前纵向力 forward longitudinal force 在测试中，用来模拟由载物引起的在X平面(见图4)的水平向前力F1或水平向后力－F1，代号为F1，单位为N。 3.22 水平力 horizontal force 在测试中，用来模拟在转弯、刹车过程中由载物作用产生的20°水平方向上的力，代号为F1q，单位为N。 3.23 横向力 lateral force 在测试中，用来模拟由载物引起的在平行于Y平面(见图4)的水平分量的力，代号为F1at，单位为N。
