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HomeMy WebLinkAboutPermit Field Test & Inspection Report 1993-8-19 (2) Q /AUG-l':;:'1?Q3 IL / 17: 24 FRCil-1 BRAHCH EHG I rlEER I rIG . @) ,TO. '3PFLD P 1'11'1[, [, Branch Engineering 19 August 93 -...., Tom Marx City of Springfield Planning and Development 225 North Fifth Springfield, OR 310 North 5th Street Springfield, Oregon 97477 [503J 746-0637 FAX {5D3] 746-0389 \ 97477 .CJ3IoS3--72fP::j r; ~l- Re: Foundation soils, lot 138 and lot 139,. McKenzie Hills, ~ 7]../7 C~ Cf3/()S7- We have inspected the above sites and have found the soils are clayey with several seeps under the Proposed house location. To prepare the site for construction, and to protect the house from soil-induced stress, we recommend the following: 1. Existing seeps are trenched to drain on the downhill side of the house pad site, The trenches should be formed in a wide "V" approximately 18" deep at the base and 48" wide at the top, They should slope to drain at not less than 2% (114" per ft,) 2. The trenches should be backfilled, and the entire pad site filled to a depth of 12", using 3/4" -(0) or I" -(0) crushed quarry rock. 3, The entire pad should then be rolled, using a fully-loaded rock truck or 12-ton rated roller compactor, making multiple passes until maximum consolidation is reached, 4. A proofing roll will be observed by a representative of the engineer's office, and an inspection report will be sent to the City. 5, The perimeter foundations shall be reinforced according to the attached drawing. The garage floor slab shall be reinforced using #4 bars at 24" o.c. each way, at mid depth of slab. The reinforcing shall be tied in place, using "dobies" or other means of ensuring proper placement. 6, The floor system using post-and-beam should be changed to a joist system with strip footings, or the piers for the post-and-beam be installed as 8" x 12" strip footings, with (1) #4 bar at the centerline of the footing. This will control differential movement in the' floor system. \.... TRANs'-UM .""nON CIVIL. . SURVEYING ./ L____