1600 MADISON ST 2016-01-01 MF Import

f. Mr. Chris Lark February 20, 2001 where moisture will be detrimental to floor coverings or equipment, a 10-mil polyethylene vapor bzrrier should be placed directly over the capillary break. In azeas where the conc:ete slab will be subjected to heavy equipment loads, such as the equipment bays anc! concrete aprons, the subgrade should be prepared to an unyielding condition, as discussed below, to provide a fivn support. If the slabs will be designed as beam on elastic foundation, a subgrade modulus of 120 pound per cubic inch (pci) should be used. 1� 5.4 ASPHALT CONCRETE PAVEMENT New asphalt paving will be placed to provide access to tE�e building and vehicle �azking. We recommend that the new pavement section to consist of 2%z-inches of ACP, overlying a 2-inch , thick layer of crushed surfacing top course (CSTC), ovedying 8-inches of structural fill. Gradation recommendations of the structural fill are discussed below. Both the shuctural fill and (" crushed base should be compacted to 95 % of the materials maximum dry density (Modified � Proctor ASTM D-1557). 5.5 ROCKERY RETAININC WALL Rockeries should be constructed in accordance with Uie Typical Rockery Detail provided in Figure 3. In general, rockeries should be used for protection of stable cut slopes and not to retain fill; however, rockeries up to about 8 feet high could be used as retaining structures at this site providing the width of the base rock is at least 1/3 the wall height as shown on Figure 3. The bottom rock should be keyed in at least 12 inches below finished grade, and be founded on at least 6 inches of structural fill or crushed rock. T'he face of the wall should be battered 1H:4V. The backslop� above the rockery wall should be graded no steeper than about 3H:1 V. Backfill between tl-,e rockeries and the face of excavation should consist of 2- to 6-inch rock. A four-inch diameter perforated plastic pipe should be placed al the heel of the rockery excavation to serve as a drain. This drainpipe should flow via tightline to an appropriate outlet such as a stotm drain system. Temporary exca��ations to facilitate the construction of the rockery may be graded as steeply as 4V:1 H. If unstable soils aze encountered during the rockery installation, the rockery excavation may need to be staged to limit the length and time that the excavation is open before the rcekery is installed. 00-046-100 Geotech Report S PanGEO, Inc.