| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 3<\/td>\n | Contents 1 Scope 1 2 Normative references 1 3 Principle of the performance tests 1 4 Requirements 2 5 Tests 3 6 Test report 5 Annexes Annex A (informative) Test levels in relation to application 6 Annex B (normative) Flexibility assessment 6 Annex C (normative) Drop test for single-seat units 8 Bibliography 10 List of figures Figure B.1 – Back static load test with flexibility assessment 7 Figure C.1 – Drop test 8 Figure C.2 – Drop test for stacking chairs – Drop height relative to mass of stack 9 List of tables Table 1 – Purpose of tests 2 Table 2 – Tests 4 Table A.1 – Relationship of test levels to use of furniture 6 <\/td>\n<\/tr>\n | ||||||
| 4<\/td>\n | Foreword <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | 1 Scope 2 Normative references 3 Principle of the performance tests 3.1 General a) static strength and initial damage; b) fatigue strength and damage propagation; c) ability to withstand acceptable misuse; and d) demonstration of residual strength. <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | Table 1 Purpose of tests 3.2 Static tests 3.3 Fatigue tests 3.4 Impact tests 4 Requirements a) any fracture of any member, joint or component, including seat suspensions and castors; b) any fracture or cracking through the full thickness of any part of a structural shell; c) any loosening, shown to be permanent by hand pressure applied to suitable members, of joints intended to be rigid; d) any loosening, relative to the shell surface, of the underframe or base inserts moulded into a structural shell, shown to be permanent by means of hand pressure applied to the underframe or base; e) any free movement in the back, arms, legs or other components of the article greater than that noted in the initial inspection (see 5.3); f) any deformation or cracks that will adversely affect the appearance or strength of any part of the sample; <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | g) any impairment of the operation of any mechanical part; h) the development of any clearly audible noise as a result of testing. 5 Tests 5.1 Samples 5.2 Moisture content of timber components 5.3 Inspection before testing 5.4 Procedure 5.5 Inspection after testing <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | Table 2 Tests <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 6 Test report a) the number and date of this British Standard, i.e. BS 4875-1:2007; b) details of the article tested, e.g. specification and photographs; c) the test level at which the article has been tested; d) details of any defects observed before the tests; e) details of any defects and damage observed after the tests; f) if appropriate: 2) details of any damage which does not impair the function of the article; g) for all-foam chairs, the back deflection in millimetres; h) the test result; i) details of any deviation from the test procedures; j) for articles which have adjustable components, the tightness and positioning of the adjustment used during testing. <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | Annex A (informative) Test levels in relation to application Table A.1 Relationship of test levels to use of furniture Annex B (normative) Flexibility assessment <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | Figure B.1 Back static load test with flexibility assessment <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | Annex C (normative) Drop test for single-seat units Figure C.1 Drop test <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | Figure C.2 Drop test for stacking chairs – Drop height relative to mass of stack <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Strength and stability of furniture – Requirements for the strength and durability of the structure of domestic seating<\/b><\/p>\n |