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� ZZA Proposed Immanuel Lutheran Church�+ddition <br /> � � 1-1708-3 <br /> February 23, 2005 <br /> �� Page 10 <br /> � Concrete Placeme��t: Special precautions should be taken during the placement and curing of <br /> all concrete slabs. Excessive slump caused by a high water-cement ratio of the concrete <br /> I� and/or improper curing proccdures used duiing either hot or cold wcather conditions could <br /> � Icad to excessivc slirinkage, cracking or curling in lhe slabs. �Ve recommcnd that ali concretc <br /> placement and curing operations be perfornied in accordance specifications and guidclines <br /> j acceptable to the architecl and owner, and developed to minimize shrinkage, cracking, and <br /> 1 curling of slabs. <br /> � Differential MovemenL• To reduce the effects of diffcrential movement, it is rccommcmlr�l <br /> that tloor slabs should be separatcd fi�om all bearing walls and colunms Uy using expansiun <br /> joints. Thc concrete slrength, slab tliickncss, reiuforccmcnt, joint design, and joint layout <br /> �, should be addressed in thc cantract documents. <br /> C.5 Drainagc Considcralions <br /> '' We rewmmend that footing drains be placed at thc basc of the perimctcr fowidalions around <br /> the entire building, as well as Uchind any retaining walls. 'I�he footing Jrains (�vith c(eanouts) <br /> should consist of 4-inch diamcter, perforated PVC pipe, sloped to drain, with +he perforations <br /> � placed down. Thc drains should be surroundcd with at least 6 inches of cleau, frec-draining. <br /> well-graded sand and gravel drainage (WSDOT Std. Spec. 9-03.12(2)) in all directions. If <br /> � «�ashed gravel is used in lieu oP thc well-graded sand and gravel, the drain anJ washed gravcl <br /> i sl�ould bc wrappcd with a non-wovcn filtcr fabric likc a burrito. Watcr from do���nspouts -md <br /> surtace water should bc iudepenJenUy collected and routed to a stornt sewer. <br /> Pinal cxlerior grades should promotc li�ec and positivc drainage trom the building areas at all <br /> times. Water must not be allo�ved to pond or to collect adjacent to foundations or within die <br /> immediate building area. We recommend tlu�t a gradient of at least tluee (3) percent for a <br /> minimum distancc of l0 lect from thc building perimetcr bc provided, exccpt in paved <br /> locations. In pavcd arcas, a minimum gradicnt ofone (1) percent should be provided unlcss <br /> � provisions are included for collection and disposal of surfacc water adjacent to the structure. <br /> 6.G Temporary ancl Pcrmanenl Slopes <br /> The following rccommendations and conslruction considerations apply to both temporary ,md <br /> pemianent slopes. <br /> � Safetv: Construction sitc safety is the solc responsibility of the Contractor, ���ho selects and <br /> directs thc means, mcthods, and scqucnciug of construction operations. Temporaiy <br /> i csca��ation slopc stability is a tunction ofmany factors, including: <br /> 1 <br /> • Thc presenc� ancl abundancc of groundwater; <br /> � • Thc t}pc and dcusity oPthe various soil strata; <br /> ■ Thc depth of cut; <br /> ■ Surcharge loaJings adjacent to the excavation; and <br /> ■ 'I�hc icngth of timc thc cxca��ation remains oprn. <br /> � �-2u.si.ua�zu� <br /> , <br />