BS EN 17326:2020 pdf free.Surfaces for sports areas-Determination of dimensional stability of shock pads used within sports systems.
BS EN 17326 1 Scope This document specifies a method for determining the dimensional stability (bowing and curling) of
shockpads used within sports surface systems. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. Forundated references, the latest edition of the referenced document (including any amendments) applies. ISO 188, Rubber, vulcanized or thermoplastic一Accelerated ageing and heat resistance tests 3 Terms and definitions No terms and definitions are listed in this document. ISO and IEC maintain terminological databases for use in standardization at the following addresses:一IEC Electropedia: available at http://www.electropedia.org/ 一ISO Online browsing platform: available at https://www.iso.org/obp/ui
In accordance with Figures 1 and 2, comprising a flat rigid base plate and adjustable side frame with internal dimensions of 302 mm x 302 mm. The side frame shall be rigid and 50 mm士5 mm in height. The test rig shall allow the measurement of the distance between the test specimen and a fixed guide bar in three positions in two directions at 90° to each other to an accuracy of +1 mm. The minimum distance between the top of the test specimen and reference bar shall be 100 mm. The measurement positions shall be:  over the centre of the test specimen; and  一10 mm土2 mm from the edge of the test specimen in each direction. 6.1 Place a test specimen in the test rig (4.1) and adjust the side frames so that on all four sides of the test specimen there is a gap of 1 mm土0,25 mm between the test specimen and the test frame. 6.2 Measure the height between the test specimen and the guide bar in each test position (five in total). 6.3 Place the test rig containing the test specimen into the air circulating oven (4.2) at a temperature of 70 °C士2 °C. After conditioning the test specimen for 240 min士10 min, remove the test rig and within 5 min土1 min measure the distance between the test specimen and the reference bar in each test position.BS EN 17326 pdf download.