BS 7971-5:2016 pdf download – Protective clothing and equipment for use in violent situations and in training Part 5: Footwear – Requirements and test methods

BS 7971-5:2016 pdf download – Protective clothing and equipment for use in violent situations and in training Part 5: Footwear – Requirements and test methods
f) Place the boot into a metal tray of a sufficient size to allow residual liquid to drain from around the boot during application. Use a new boot for each test.
g) Lightly mark the sides and tongue area of the test sample with a horizontal line approximately 5 mm below the top of the bellows of the tongue.
NOTE 1 This is to allow accurate application of the test solution in a position below the bellows of the tongue (a waxed pencil or chalk have been found to be suitabl
e) and to minimize any incidence of accidental spillage during application into the inner of the boot.
h) Pour 60 ±6 ml of test liquid evenly across the two sides and front of the boot and leave any spilled volume in the tray in contact with the sole until the first examination is completed. It is useful to have the boot at an angle of approximately 45° when pouring chemicals onto the side sections.
NOTE 2 It has been found that using smaller containers each holding 20 ±2 ml of the test liquid per side and across the centre front makes application more consistent.
i) Leave the samples for a period of 10 min ±30 s prior to removal from the tray and assess any initial damage.
j) Remove the absorbent paper from inside the boot and, if any liquid penetration is visible as damp patches, note the location of ingress and make a comment on the severity of ingress (none/slight/moderate/severe).
k) 1 h ±2 min after pouring the chemical, carry out a visual inspection of the boot, comparing it to an original (or photographs) and note any damage or visual change (for example, surface marking or damage, damage to components, lack of functionality). Check the area under any lacing or fastenings where spilt liquid might be trapped and not easily visible.
NOTE 3 The test sample should be cut open to assess any internal damage.
5.2 Method for determination of ergonomic penalty during walking/running Three sizes of footwear shall be tested, one from towards the upper end of the size range, one from the lower end of the size range and one from the middle of the size range. The three wearers, who shall have feet of a size suitable for the test footwear and shall be physically fit enough to run 100 m in footwear of their own choice shall attempt the below actions a) to b) while wearing the test footwear. If the footwear is intended for both male and female wearers at least one wearer shall be male and one shall be female.
NOTE If considered necessary (e.g. as recommended by the manufacturer), a break-in wear period and the use of thick socks is permitted. Actions: a) Walk for 100 m and then run at a steady pace for 100 m. b) Move rapidly up a typical 10–12 rise of stairs and then walk down the stairs. A record shall be made as to whether or not it was possible to achieve each action and whether or not there was any discomfort or whether the fastening system had loosened to the point that the footwear was coming off.
5.3 Method for determination of burning behaviour
a)Clean the boot with dry absorbent paper to remove any residue or
manufacturing finishes.
b)Store the boot for at least 24 h in an environment at 23 ±2oC and 50 ±5% rh.
c)Fasten the boot.
d)Prepare 15 ±1 ml of a solution of 50% toluene and 50% ISO octane.e) Place the boot on an open metal grill with a metal tray directly beneath it.f)Lightly mark the sides and tongue area of the test sample with a horizontal line approximately 5 mm below the top of the bellows of the tongue.
NOTE This is to allow accurate application of the test solution in a positionbelow the bellows of the tongue (a waxed pencil or chalk have been found tobe suitable) and to minimize any incidence of accidental spillage during application into the inner of the boot.