1111 CRAFTSMAN WAY 2016-01-01 MF Import

i � or sand and gravel. If significant truck traffic must occur over the slab area during construction, I' we recommend a minimum 12 inches of subbase. • In asphalt pavement areas, we recommend a granular subbase consisting of a minimum 8-inch-thick layer of clean sand and gravel with Iess than 5 percent passing the U.S. No. 200 sieve. The subbase thickness should be incrcascd to 12 inches if the construction schedule ��ill extend into the wet season. Portions of the existing soils (isolared areas of crushed rock) may bc suitabic for use as subbase. • ��e understand that the column loads will be relatively light (in the range of 30 to 50 kips) within the office, shop and n:tail areas and heavier (up to 150 kips) within the bo:u storage arca. \Ve rccommend that the footings be supported on a minimum 2-foot thickness of compacted structural fill utilizing an allowable soil bearing pressure of 2,000 psf(pounds per syuare f'oot) for dcad plus long-tcrm livc loads. • Ground surface settlements should be anticipated at the site in arcas that have not experienced historical loading. The building and surrounding facility should be designed to tolerate the anticipatcd settlemcnt. . 1Vc recommend that the slab be tied into the perimeter grade beam and interior column footings. We suggest including reinforcement steel within the slab because some setdement of the soft silt will occur because of the variable historical loading and proposed loading conditions. • �Ve understand that the projcct will bc designed using 200G IBC. �Ve recommend thc project site be classified as Site Class E. • 1Ve recommend a pavcment design section consisting of 3 inches of Class B asphalt concrete o��erlying G inches of crushed surfacing base course over the previously mentioned subbase in hea�y traffic areas. The thickness of Class B asphalt conercte and Uase warse can be mduccd ta 2 ovcr 4 inches in light service or automobile parking arcas. • \Ve recommend concrete pavement consist of a minimum G inches of PCC ocerlying G inchcs ul crushed surfacing basc course. \Ve sugeest at Ieast nominal steel reinforeement 6e included in the slab. EARTHWORK I[ appears that minimal site grading wi(I be required to achie��e the proposed building subgrade. :�dditional cxcavation will be necessary to conswct thc zone of strucwral fill recommended for footing support. As describcd in a subsequent section "Shallow �oundations", n�e recommend footings bc supported on a minimum 2-foot thickncss ofcompacted strucwral fill. �Ve recommend a minimum 3-inch thick subbase section be utilizcd beneath thc pavcmcnt, and a G-inch subbase beneath slabs-on-grade. The slab suUbase should consist o(cican '„-inch minus crushed rock or sand and gra�el ro perform as capillary brcak. Loose silry sand fill is anticipated at thc proposed subgrade eicvntians. These soils are c�tremely moisture-sensitive and will not be accessible during wet weather. If«•et weather construction access is rcquired, it may be necessary to place a 12 to 18 inch layer of quarry spalls or crushed rock. \Vc recommend that a memUcr of our siaff evaluate the exposed subgrade aRer s[ripping is completc and prior to any subb:isc placcmcnt. Thc c�poscd subgrade should Uc compactcd to a minimum 9� percent o( thc �1DD in accordance with ASl'\1 D-1»7. 1(the subgrade does not rcspond to compaction, exca��ation Fi4rM1'o. /1652-001•00 PYgC.T ('iEOENGINEENS� SorrmG.r 6.?OU6