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r <br /> GENERAL NOTES: <br /> Rockery construction is a craft and depends largely on the Railing/FenceJY. Per City Standards <br /> skill and experience of the builder.A rockery is a protective <br /> system which helps retard the weathering and erosion <br /> process on an exposed soil face.While by its nature(mass, I. <br /> size and shape of rocks)it will provide some degree of o <br /> retention, it is not a designed or engineered system in thef&2 Man Roclr '-0•' - <br /> sense a reinforced concrete retaining wall would be considered I ,' •. o• ;.o' <br /> designed or engineered.The degree of retention achieved is •'o• o. o <br /> dependent on the size of the rock used;that is,the mass or ��'•�•�'1 — <br /> weight,and the height of the wall being constructed.TheI r °. o •6 I I <br /> larger the rock,the more competent the rockery should be. s 1 0•:'. o.•— <br /> Rockeries should be considered maintenance items that will 3&4 Man Rock s <br /> require periodic inspection and repair.They should be located y . <br /> so that they can be reached by a contractor if repairs become :. '.Q�o:•0::' <br /> necessary, o•o., o. 0 <br /> •o:. <br /> ...Maximum inclination of the slopes above and behind —. - H a••O:Q,'o• <br /> rockeries should be 2:1 (Horizontal:Vertical), _ c.o .*0 0; <br /> i ...Minimum thickness of rock filter layer behind rockery is .0' A, <br /> 18 inches. �= p•'...a::o <br /> Minimum of 12 inch embedment into undisturbed native <br /> soil or compacted fill placed in accordance with report o;•o.• Oo:o <br /> ' recommendations. 4&5 Man Rork <br /> ...Maximum rockery height H= 9 feet. <br /> ...Rockeries greater than 8 feet in height to be installed <br /> under periodic or full time observation of the geotechncial _ 0 •o o I I <br /> engineer. o.;•o <br /> ' III ° ��• <br /> Unless otherwise specified in writing by the rockery 12 min, - <br /> "designers",all rocks placed in the lower two-thirds of the I I I I I I I ' .0% <br /> wall should be 5 to 6 man rock,4,000 lbs.or larger.Rocks a <br /> placed above this level should gradually decrease in d• 0 <br /> 1 size with increasing wall height using 3 to 5 man rock, <br /> 700 to 6,000 lbs. <br /> The long dimension of the rocks should extend back <br /> towards the cut or fill face to provide maximum stability. <br /> Rocks should be placed to avoid continuous joint planes in <br /> vertical or lateral directions. Each rock should bear on two <br /> or more rocks below it,with good fiat-to-flat contact. NOTES: <br /> All rockeries over 4 feet in height should be constructed on Rockery construction to be completed in accordance with ARC <br /> basis of wall mass,not square footage of face. Guidelines. <br /> Earth Solutions NW representative to observe rockery construction <br /> Size Approximate Approximate and prepare final report. <br /> Weight-lbs. Diameter <br /> 1 man 50-200 12-18" <br /> 2 man 200-700 18-28" <br /> 3 man 700-2,000 28-36" <br /> 4 man 2,000-4,000 3648" <br /> 5 man 4,000-6,000 48-54" <br /> 6 man 6,000-8,000 54-60" <br /> Reference:Local quarry weight study using average weights <br /> of no less than six rocks of each man size conducted in <br /> January 1988. <br /> LEGEND: r a, <br /> s.b Drainage materials to consist of clean angular r r <br /> 40 xp. well-graded quarry spalls,with 4-inch maximum G 4 t - <br /> size,or other material approved by the geotechnical + <br /> engineer. <br /> 111 <br /> i Undisturbed firm Native Soil. CUT ROCKERY DETAIL- NO SURCHARGE <br /> Drain pipe;4-inch minimum diameter,perforated <br /> Underwood Gartland -Wet Ponds <br /> or slotted rigid plastic PVC pipe, laid with a positive Everett, Washington <br /> gradient to discharge under control,well away from <br /> the rockery. Drwn. GLS Date 04/01/2015Proj. No. 2232.02 <br /> Checked RAC Date April 2015 Plate 1 <br /> a� j <br />