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• 7l•iJ .. -. _..._.-. _.. .... _ <br />• Table A.3. Effective roadbed soil resilient modulus vaiuaa. MR (Pap. that may be used in <br />• the design of flexible pavements for tow•vo!umo roads. Suggested va!uea <br />- depend on the U.S. climatic region and rho relative gu slily of the roadbed soil. <br />Ra[attva Queliry of Rtasdt>ed SoN <br />U.S. <br />~tzatio . . <br />Rayioo Yery Poer Poor s•atr ~ - ' ~Goed - - Very Ooed <br />1 <br />d <br />M <br />IV <br />V <br />Vt <br />\I <br />2,800• <br />2,700 <br />2,7t)D <br />3,2CU <br />3.100 <br />2.800 <br />3,700 <br />3.600 <br />3.000 <br />4.100 <br />3.700 <br />?A 00 <br />. ~'tt.'EG::xT ~•:2S~.iCtY. tdriCallia Q: '."si •. - .. <br />efft~-9a :3ada:as of rite madbcd so$ d.:..)aped fa: <br />.riex:bie p; %er..~t deti~sbtrtddaor be used ~ li:v of <br />tys procd~ ti~crocd bcza <br />'the pritasry desSga rem :*~-eau fez aSgreyase- <br />atufae.~ toad: (t7) it[cladc <br />t:t the pteditaed taiuR tralt!c, Wla (setxiaa <br />2.1.1). for the period, <br />(~ the lengths of the seasons (Section 2.3.1: or <br />criteria in Sea!oaa.l.l ttixy be used itbettcr <br />iafortttat!oa h sot available), <br />(3) seasonnlrest7ientmodutioftheroadbedsot~ <br />(Se.^tion 2.3.1 or general criteria in Secrion <br />4.1.1 maybeused'Sbetterinformacion [: ra: <br />a~atl~hk), • <br />(a) el3stie modulus, Ens (psi), of a~grcgatebasc <br />tay~cr, (Serfon 2.3.3), <br />[:) elas<ie'modu)u, EsR (;si) of ag);:egam <br />subbase Eager (Secton 2.?,3), <br />,t/ Sctign se:ci~abi!'n}• lasx, PSI (Se~z!on <br />_.:.! ). <br />(:) altowablc na[ing. RD (inches), in surixe <br />Lt)~cr (Section 2.2.2), and <br />5,000 ~ Ca.800 ~ S.E00 <br />t•5tb 8.500 7 ~G0 <br />4•tX)0 4.a00 6.700 <br />6.600 ~ 7,900 t t,1p0 ' <br />r '.00 6,0ti0 ~ 8,200 . <br />., CO . '~ • . ~t.fi00 ~ 5,700 ~ . <br />... -.- _ ... i <br />f8} .zee.,...,..rlesR.i:i_(inib~Laf><erfss!.z~' <br />'1'tesa daiga. ~rregaizemen[s as nand is ca~uxecn <br />ti+ita fhe ecmpettaLOOai chars is Table a.4~an~ ~t~bJa~~ <br />- drsiga aomegrap!u for srsicsbidty (7=tStrra a3)GYY <br />rnxsia8(Fignn4.3).I4atncampieoftbeapplitztioaof ~ <br />cr.+a., s:epa of this proCditre is presrttt~ to Table ~ ' <br />as, <br />... Strpl: Seleecfnurieveko.'eg8regatebaaett.:..u.=~' . <br />D$s, which should bound the probabT: soitttion. For <br />thts,foorseparate tables, ldeatiealtoTab}e aA,shnatd <br />be prepared. £ntaeaeh ofthe fourtrisibasathicknas, <br />D , is the upper[eft-band co:acr of each otthe four <br />rabies i~tsa = 8 iaohea is used !n tiro ec[ample). <br />Step1: En[erthedesigaseniceabilitylossaswe8as <br />[hc eUow-able rutting iA the appropriate boxes alnch <br />of the tour wb)es. <br />Step 3: Enter the appropriate seasonal ratlient <br />(r'.ascic) moduli o[ slte roadbed (A4 A) and theagsregate <br />base t^_atrriai. Ea5 (pail, in Columns 2 at:d 3. rts;.eo- <br />rivet?•, of Tabtc a.a. The ba:c medeitu cases cdy be <br />pwpo:eioa ;I to the resitde: t ti'tr'du:us vi e~:e rcae;:1 <br />sort 3urn. a civet: srnsan. A conatsnc+ai::: of 33.06) <br />pn w as ua:S m c`s easm~ !c. `.owne:.>uce a ; o ;ion <br />otthe xgg: cenu : i:c matt::al a u! to :am recd ia:a a <br />eaui+a!cnc c!na.ncis of suc~ase to-te-ai t~+~lva~ ui!t <br />pro+i3a some xF.:e W ; rains[ tl:c cn+'tronmc-tat mogturc <br />effects). <br />• bl 'A 4fZ/'oN -tut 'uot tai~ossv scan: el9ltaa ~wJll :i onni •n~•~uw <br />REVISED JULY 2006 Attachment 2.05.3(3}8-12 <br />