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05-24-84 Agenda & Packet
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05-24-84 Agenda & Packet
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3/12/2025 12:18:44 PM
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MV Parks, Recreation & Forestry Commission
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�,. <br />1 AVERAGE G-FORCES OF <br />SURFACING MATERIALS <br />AT VARIOUS HEIGHTS <br />� <br />�w! <br />✓ <br />Surface Matarial <br />Concrete <br />Thin Mat• <br />ASDhaI� <br />Packetl Earth <br />Gym Mat p1 <br />Gym Mat X2 <br />Rubber Mat <br />(1 1/8" thick) <br />Double Rubber Mat <br />San0�10" deepl'• <br />Pea Gravel Nt <br />(8" Oeepl"' <br />Pea G�avel p5 <br />(8" deap�"' <br />WooE Chips <br />112" Oeep) <br />Drop Height in Feet <br />.25 .5 1 2 3.5 4 8 10.5 <br />I <br />150�200 250-300 475-525 � <br />80�80 125-150 275�300 <br />40-45 60�65 140-160 <br />175-225 <br />8-72 55-70 <br />1•2 4-5 170-190 <br />3�5 6-15 40-55 <br />7 2-75 24�28 50•58 70-80 <br />10-13 1540 <br />10-15 10�20 15-40 20-60 <br />10•75 10�20 1530 25•40 <br />1- 15�20 30-35 42-48 <br />' Co�rupaled Nbber mat, 1/8" ihick, wilh 1/16" vinyl corer <br />"Wet, lirmly packetl eantl <br />"' RounCed, river washe0, up to 3/B" tliame�er <br />Nole: Fqures piven intlicate range ol G�lorce in repeatetl tlrop tests. Ssrbus M/unss ere Nkaty /o oeCUr In fm- <br />pecla M axoeea ol b0 �a, /ataNffes at 180 Gs. <br />Sauree: US Conaumar Producl Selety Commission, Preparetl Sfantlaro !or Pu�IM Playprountl EpWpmsn6 May <br />1978. P. 29 <br />
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