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STItE.�'.TS AND RELATED WORK <br /> 3•15.2 �IATERIALS <br /> All rock shall be saund, angular Icdgc rock that is resistant to weathering. Thc longest dimension of any <br /> individual rock should not exceed three times its shortest dintension. Acceptability of rock will bc <br /> detcrtnined Uy laboratory tcsts as hcrcinaftcr specified, geologic examination and historical usagc records. <br /> All rock dclivered to and incorporated in the project shall meet the following minimum specifications: <br /> a. Absomtion N�t mo�•e ihmt ?0�;'o fa•igncous <br /> r�STM C 127 nncl mefnrnaphic rock qpes and <br /> AASI-ITO T-35 3.0%for sediinentnry rock q�pes. <br /> b. Accclerated Lxpansion (15 days) Not mnre than IS^o Grenkdoti+�n. <br /> CRD-G143*1, *2 <br /> c. Soundness (MgSO4 at � cydes) Not grealer t6nn S�lo lass. <br /> ASTM CS3 or CRD-G l37 <br /> d. Unconfined Compressive Strength Int�ct strength of 6,000 p.si, ur <br /> r�STM D 2933 gr'euter. <br /> c. 13u1k Specific Gravity(155pcn Grcarer tGni� 2.�lS. <br /> ASTM C127 or Ar\SHTO T-35 <br /> *L The test sample �vill be prepared and tested in accordance with Corps of Gngineers Testing Procedurc <br /> CRD-G 1d3, "Vlcthod oP Testin� Stonc (or Gxpansivc Brcakdown on Soaking in Gthyicnc Glycol." <br /> *2. Acccicrated e�pansion tests should also indude analyses of the fractures and vcins found in the rock. <br /> Thc dcnsily of thc rock shall bc cqual to, or grcatcr than, onc hundred fifty-fivc (l55) pcL Typically, rocks <br /> uscd Cor roch �vall construction sh�ll bc sized approximatcly as shown on Standard Plan 3?�4. <br /> Rockciy caps will be required on all rockerics higher than faur (4) fcet in the public rieht-oGway and <br /> optional on piivate prope�ly. The cement concrete cap shall be a minimum of two (2) inches thick. <br /> Concrete for Rockery Cap shall be Class 3000 or Commercial. Lantp black coloring agent to matdi the <br /> color of thc rockery sh:ill be added to the cement concrete during mixing in an amount not to exceed l�ii <br /> pounds per cubic yard oP cuncretc. Nherc a pedcsuian or arnamental handrail is rcquired, the rockery cap <br /> shall be deepened to a minimum of hveh�e (13) inches for a section six (6) inches either side of e.ich pipc <br /> slccvc. Dumnry joints sh.�ll be constructcd at t��clvc (I_') foot intcrv:ils. 'I�h� dcpth of thc dummy joi�it shall <br /> bc onothird !hc dcpth of thc cap. <br /> 3-15.3 GI:NI;RAL <br /> Surfaces rc.ison;�bly accessible to pedestrians ahmc an�t adjacenl to rockenes o�•er 30" in hcight shall be <br /> prolcrtcd by :� guardrail canfortnin� to Scction 1713 0l thc Unifomi Building Code and to Scction 3-16 of <br /> thcsc Spccitir.�tions. <br /> A Public Norks perniit is required for all rock walls within tlic public righ[-of-way and for all thosc <br /> escccding d fcet in hci��ht on privatc property. <br /> 3-15.4 CONSTRUCCION RliQUIRI?�IGNTS <br /> The tiist step in rock wall consul�c[ion, aller �eneral excavation, is to constnict a ke}nvay of at Icast twelvc <br /> (13) inches in depth. estending for the full Icn�th of the rock ,vall. The key�vay shall be slightly inclined <br /> Lack tuw:irds the Iace bcin�� protected. Once the competency of tiie keyway suberade to support the rock <br /> �v:dl is verificd, a shallow ditch or trench, approximatcly hvelve (12) inches wide and dcep, shall bc dug <br /> ;il�m�� thc rcad edge of thc kcyway. A four-inch diametcr perforated or slotted hieh-densiry polycthylenc <br /> I I InP6), smuoth interior pipa shall Ue placed in the h•ench. This drain pipe shall be instalicd with sufficicnt <br /> sl�,�i� to initiatc Ilow and thc outfall conncctcd to ;� positivc :�nd pcimancn[ discharge. <br /> STANDARDS 3-14 Rev.4/02 <br />