ISO 7176-8-2014 pdf free.Wheelchairs – Part 8: Requirements and test methods for static, impact and fatigue strengths.
When tested in accordance with Clauses 8. 2., and 1, a single wheelchair shall meet all the following requirements at the conclusion of the tests.
a) No component shall show evidence of visible cracks, be fractured, or have become detached, with the following exceptions.
1) Readjustment of postural supports Is allowed after each of the tests in Clauses 8 and 9.
2) Re-tightening, readjusting, or refitting of components that are identified in the operator’s manual as operator-adjustable components is allowed at 25 % intervals during each of the multi drum, drop, and manual brake fatigue testing procedures (Clause 10). Operator adjustable components, as identified in the operator’s manual, may not be adjusted using tools unless the tools are supplied with the wheelchair. If there are operator adjustable components, fatigue test equipment may be stopped at 25 % plus or minus S % intervals, to determine if re-tightening, readjusting, or refitting of operator-adjustable components is required. Re- tightening, readjusting, or refitting shall then be performed, following the procedures outlined in the operator’s manual. Restart the test equipment after re-tightening, readjusting, or refitting has been performed.
3) Re-tightening, readjusting, or refitting of any other component is not allowed.
4) During the fatigue testing (Clause 10), the following wear items, if they are identified in the operator’s manual, may be replaced no more than twice per item: tyres (including solid tyres), inner tubes, drive belts, castor wheel rubber. In the case of castor wheels that are a single integral part, replacement is only permitted because of wear or failure of the running surface, but not for failure of the wheel structure or other elements (e.g. bearings). No other wear items may be replaced.
5) Cracks in surface finishes, such as paint, that do not extend into the structural material do not constitute a failure.
b) No externally visible electrical cable shall be cut, abraded, or crushed. No externally visible electrical connector shall be crushed or disconnected.
c) All parts intended to move, rotate or be removable, folding or adjustable shall operate as described by the manufacturer.
d) All power-operated systems shall operate as described by the manufacturer.
e) Handgrips shall not be displaced.
f) No component or assembly of parts shall exhibit visible plastic deformation, free play, or loss of
adjustment that adversely affects the function of the wheelchair.
g) The brake mechanism shall not have moved from the pre-set positions.
4.2 Disclosure requirements
Manufacturers shall disclose in their specification sheets, in the manner and sequence specified in
ISO 7176-15, ii the wheelchair meets the strength requirements of this part of ISO 7176.
5 Test apparatus
5.1 Loading device, shall be capable of applying forces (compressive or tensile) to the wheelchair in the range 15 N to 2 000 N to an accuracy of ±3 %.
5.2 Concave loading pad, shall be made of metal or hard wood as shown in Figure 1. If suitable, the concave loading pad specified in ISO 16840-3 may be used in place of the concave loading pad shown in Figure 1.ISO 7176-8 pdf download.
Tags: Wheelchairs
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