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t . Design/Estimating Charts : Reinforced Wall Chart Notes
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The Keystone reinforced wall charts are graphically gcesentcd to show the proptr lotation and lengths of geogrids us�d with
K ont Com c units at tht ncar vertical and 1 inch 25mm setback batter 8°.Des' hei ts were set in two block
eYst Fa { ) ( ) � F�
increments be�nning at 43 feet(13m)and ending 1 t feet(3.4m).Engineering judgement shoutd be used whtn ij►terpolating
' between heights.In general,gcogrid should be pL�tted at the design elevation for the entirc wall length or until a wall step is
� reached.Minimum reinForcerr�ent kngths were set for 4 fcet(1.23m)minimum and a 7096 reinforcement length to wa11 height
ratio.Alw�ys use the same vertiral spacing af geogrid thraughout tlie wall.Top layers of geogrid shall never be more than 2
units from the top af the wa1l.Bottom layers of geogrid shall never be morc lhan 2 units from the top of the leveling pad InseR
a geogrid laycr at these lorr.ttions where 2 unit courses are acceeded.25i1 psf surtharge is applied 6 inches behind the tail of the
us�rs.Soil ranges were sclected to approximate good.medium and poor soil oonditions to wver the typica!design range.Wall
height is the tatsil height of the wall firom the top of the leveling pad to top af walf.
'i'hr charts use Ranklne earth pressure for cafc�ilations.The following charts assume the use of a rnated polyater geogr�d with a
� minimum allowabEe design strength of LTDS=1875 Plf(27.4 kN/m)Ta1=1250 plf(t83 kN/m).Ti�e following geogrid types are
suitable with these design charts:
*Synteen SF35 by Syntsan
�Miragrid 3XT by TC Mirafi
.Stratagrid 200 by Strata Systems
�55/30-20 by Huesker Inc.
All geogrid len�shown are the actual lengths of geogrld requirrd as measured fmm the&ont wall face to the end of the
geogrid'The dai�nlestimaWg chaita assume that the waUs are oarWsvcted in aaordana with Keystone specifu�tions and
good construcEion practice.AU soit wnes{reinForted.retvned and Foussdation)rnust be compacted in 8 inch(203mm)lifts
to 95%Standard Proctor density or 92�i Modified Procior De�sity as determined by laboratory testing.The infomiation
oontained in the design/estimating charts are for preliminary design use only.A qualit3ed prafessiona!should br consultcd for
final design assiscance.Keystone actepts no kiability for the use of the�e charts.
REINFORGED WALL SGHEMATIC
War Height(H)a tF�e to�al height
� �.�u�,.. �� re.�r�w=�.a• homtoptobottom.
���� ��++d• i Mirvmum wall embedment is 6 inches
.. (150mm)or Meigbt/20.whithever�
,�,T`z}_ greater forlevel toe.
Subwrfaoe soils must be capable of
` �.�q soz supporting wall systam.
:
. � J Unit drainage fill is�l4 inch t19mm)
p��� / clean crushed stone.
� ,' � Leveling pad is crushed stone base
f material,
� A1)backfill materials are compacted
wr�yn� � per«rd S�w zwr to 9596 Standard Proctor density w
c�u� � 9296 Mod�fed Proctor dern�ty.
_ �• �.�.�� j
. �� �., � �• Geog�ids must be af appropriate type
t� . and length per the design.
,:' j u�e.��...� F�ished grede must provide positive
, drainage
f"ihidin"" . The sym6of— 50' �cates bcaUnn
—���F�— and length of geogrid meawrec!from
���P�6��,� the front of wall td the end of the
�ro P� geogrid.
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iuetrMd i+rl d�qntinWen W tM r�ebiq b IN u�mm.rdwd.nd rtf mr+w d uw w IM�a4 rwpetibiry d tl+ur Sm�nu.M d�pn wi w►ry�duM b�Pw1o^rd bl�4Yhd�q,w� �
10 AeyxtoneConstnittionManual
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