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i <br /> I <br /> � <br /> � <br /> r <br /> CASCADE GEOfECHNICAL <br /> � � August 3, 1989 <br /> Job No. 897-25G <br /> CPC� LTD. <br /> � Paqe 4 <br /> i <br /> � placed on the recommended bearinq soils may be deaiqned to a <br /> maximum eafe bearinq value of 2000 psf. The footinq areas ahould i <br /> "� be free of organic, water and loose soil at th+ time of placement I <br /> �� of concrete. We should be engaqed to observe the footinq trenchea <br /> � prior to placement of the concrete to verifV Ruitable soil <br /> co�ditions. <br /> � We recommend that all footinas be placeA at least eiqhteen ( 19) <br /> inches below the outside finiaheA qrade for frost protection. <br /> � Minimum footing widths ahould conform to the local huilAinq codea. <br /> � Slab on Gra9e <br /> ; <br /> � The slab subgrade shoulA conaiet of native undtaturbed ailty sand <br /> � with some qravel or atructural fill compacted to 95! of the ASTM I <br /> i <br /> ' G-1557 dry �lenqity. , <br /> � I <br /> We recommend placinq a minimum of four (4 ) inches of free dcaininq <br /> � material beneath the slab to act as a capillary break. A vaoor � <br /> ' barrier on top of the capillary break would �ecrease the Aossi- <br /> � bility of local moisture problema with the alab. If desired, two <br /> S ( 2 ) inches of sa ,d may be placeA on top o£ the vapor barrier to a1A <br /> � concrete curing. I <br /> � Draina e I <br /> We rer_ommen�l placinq a perforated rigid drain pipe, bed�7ed an�3 <br /> � backfilled with pea qravel, alona the ba�e of the footinqs and <br /> tiqhtlined to an apnropriate drain system. The roof drains shoulct <br /> � be tiqhtlined away Erom the bui191nq nnd any alopes aeparately f.rom <br /> . the Eooting drains. <br /> � . <br /> � <br /> I <br /> I <br />