1600 MADISON ST 2016-01-01 MF Import

� � � �� f � � Mr. Chris Lark February 20, 2001 where moisturc will bc detrimcntal to (loor covcrings or cquinmcnt, a l0-mil polycthylcne vapor barrier should be placed dircctly over tne capillary brcak. In areas where the concrete slab will be subjected to hr,avy cyuipmcnt loads, such as thc equipment bays and concrete aprons, the subgrade should bc prcpared to an unyielding condition, as discussed below, to provide a firm support. If the slabs will be designed as bcam on elastic foundation, a subgrade modulus of 120 pound per cuhic inch (pci) should be used. $.4 ASPIIALT CONC[2ETE PAVEMF:M1T New asphalt paving will be placed to provide access to thc buifding and vchicic parking. Wc recommend Uiat the new pavement section to consist of 2%:-inches of ACP, overlying a 2-inch thick layer of crushed surfacing top course (CSTC), overlying 8-incl�es of s[ructural fill. Gradation recommendations of the structural fill are discussed below. Both thc strucWral (ill and crushed base should be compacled to 95 % of thc materials maximum dry dcnsiry (Modified Proctor ASTM D-1557). S.$ ROCKERY RETAINING �'VALL a Rockeries should Ue constructed in accordancc with thc Typical Rockcry Dctail provided in � Figure 3. In general, rockeries should Ue used for protection of stable cut slopes and not to retain fill; however, rockeries up to about 8 feet higli could bc used as retaining structures at this site providing the width of the Uase rock is at least 1/3 the wall height as shown on Figure 3. �_ �. L L The bottom rock should be keyed in at least 12 inches belo�v finisUed grade, and be founded on at least 6 inches of strucWral fill or crushed rock. The face oFthe wall should be battered iH:4V. The backslope above the rockery wall should be graded no steeper than about 3H:1 V. Backfill between the roc�ceries and tlie face of excavation should consist of 2- to 6-inch rock. A four-inch diameter perforated plastic pipe should be placed at the heel of the rockery excavation to serve as a drain. This drainpipe should flow via tightline to an appropriate outlet such as a stom� drain system. Temporary excavations to Facilitale tl�e construction of the rockery may be graded as steeply as 4V:1 H. If unstable soils are encountered during the rockery installation, the rockery excavation may need to be staged to limit the length and time Hiat the excavation is open before the rockery �5 �nscau�a. 00-046-100 Gcotccli Rcport 5 PanGEO, Inc. y�