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Composite Modulus of Subgrade Reaction(kc)
301-2January 1999
Ref. Section & Figure301.4, 302-1 (step_ÿ__
Exomp le:
DsB(Assumed) = 6 inches .(150 ram)
ESB= 30,000 psi {Figure 301-1)
FAR = 7,200 psi {Figure 205-1)
Solution:kc= 400 pci
2,0003,000
5,0007,000
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1,000
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I,O00,O00600,000400,000200,000
%88850,00030,00015,000
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gÿp: ,'
Effective Modulus of SubgradeReaction (k)
301-3January 1999
Ref. Section & Figure301.6, 302-1 (step 5)
I000
o,-,." ÿ 100
oÿL ÿ 50
''S
o L
/
/
f
/
/,,/" I
oÿ Jo
a 5o
q..,14-w
J
5 I0 50 I00(4,
Compoail"e Modulus of Subÿracle Reactlon, ko (pod
I000 2000
Example:Kc = 400 pci (Fig. 301-2)LS 1.0 (Fig, 301-1)SoluTion:K = 130 pci
Rigid Pavement Design ChartSegment 1
302-2January 1999
Ref, Section & Figure302, 302-1 (step 6)
Drainage Coefficient, Cd
i__I
Examplek = 130 pci (Fig. 301-31 Lo "TransferEc = 5.0xlO6 psi [Fig. 301-11 Coe nt, J
Sic = 700 psi (Fig. 30HI [XIJ = 2.8 (Fig. 301-11 04 CO ÿT" . ÿ.,
Cd = 1.0 (Section 205.21 ÿ- PO Iÿ bO 0ÿ%
%%
%%
%
Mean Concrete Modulus o ÿRupture, Sic (psi) "ÿ
0 0 0 ÿ 0 0 ÿo°oo o o ROd -- 0 Oh ÿ oo LO Lr)
1IIi
Rigid Pavement Design ChartSegment 2
302-3January 1999
Ref, Section & Figure302, 302-1 (step 6)
IO00
NOTE= Application of reliabilityiri 'thls chart requiresthe use of mean valuesfor all input variables,
IIIIII
EXAMPLE:TL
R:85% (Fig. 201-1)
So=0.39 (Fig. 201-1)
ESAL:I3.7xl06(Fig. 302-1)
A PSI=I.7 (Fig. 201-1)
Solution D=9.6 inches