Laserfiche WebLink
M03107GE <br />'~ SPREAD FOOTING <br />SOIL BEARING CAPACITY <br />I CONTINUOUS ISOLATED A* <br />(POUNDS PER SQUARE FOOT) feet <br />2,000 2,500 0 <br />2,200 2,700 1 <br />2,400 2,900 2 <br />2,600 3,100 3 <br />2,800 3,300 4 <br />A* Minimum depth of embedment for footings adjacent to level <br />areas. <br />If deeper embedment is considered for increased bearing capacity <br />greater than presented above, we should be contacted to provide <br />additional analysis and recommendations as needed. The bearing <br />capacity design value is based on several considerations and these <br />may change with depth. <br />We understand that as currently planned no foundations will be <br />within about twenty (20) feet of the sloped area. If these plans <br />are changed we should be contacted for additional comments and <br />recommendations concerning slope/foundation interaction. <br />The bearing capacity may be increased by about twenty (20) , <br />percent for transient loads such as wind and seismic loads. <br />It is our opinion that footings should have a minimum depth of <br />embedment of at least one (1) foot on all sides to 'provide a more <br />predictable long term performance of the footing. We understand <br />that construction techniques typically used in the area may result <br />in. some of the footings in the crawl space constructed without <br />significant embedment of the bottom of the footing below the lowest <br />adjacent grade. For this reason we have provided design values for <br />footings constructed with little or no embedment. It is our <br />opinion that the performance of footing constructed without embed- <br />ment may be influenced by erosion, temperature changes, moisture <br />content changes, swell potential of the soil supporting the foot- <br />ings and weathering of the soils supporting the footings and will <br />have a less predictable settlement response than footings with <br />embedment. <br />Exterior footings and footings with uneven backfill may result in <br />movement of the footings. Embedment of the footings on all sides <br />will help reduce the potential for movement of footings with uneven <br />backfill. We do not recommend exterior footings or footings with <br />uneven backfill be constructed without a minimum depth of embedment <br />J <br />11 <br />lambert ana ~,~,~beiate.s <br />I;ONtl11L IINU GEGI U:I MIf,AL ENGIN EE N$ ANI) <br />MAZE RIAL 1E5 i1NG <br />