Requirements for removable mattresses and mattress sections with a flexible load-bearing core and waterproof cover intended for use on operating tables to give a flexible support between patient and the table top.Cross References:BS 903:Part A2BS 903:Part A26BS 903:Part A43BS 2050BS 2823BS 3574BS 3978BS 4443:Part 1BS 4443:Part 2BS 4443:Part 4BS 6859:Part 1BS 6859:Part 2