3430 SEVENICH DR Geotech Report 2018-01-02 MF Import

W-8396 - Mr. Bill Ruek�r P�pe 9 25 Ssptembsr 1992 — Sh�llow Found�fions All footinps should be tounded within the medium dense sandc or medium stiff to hard silu, or within compacted struetural fill plaeed abova a stripped and properly prepared subprade. Footinps should not ^ be founded on or within loose or disturbed native or fill soil, topsoil, or existinp fill materials. Continuous or column footinOs founded in the prefcriWd native or structural fill soils may be desipned for a maximum allowable bearin0 pressure of 1,500 psf.' A one•third increase of these bearinp �, preuures may be used for short-term wind or seismic Ioadin0• Exterior footinos should extend at least � 18 inches below adjacent prade for frost protection, while the interior footinps shouid extend at ieast 12 inches below adjacent pnde. We reeommend that all continuous and isolated spread footinps be ,., it least 18 �nd 24 inehes in width, respectively. `.---- We estimate that the total settleme�t of foundation members founded within the prescribed bearin0 saaU may apDro�ch 1 to 1 X inch. DifferenUal settlement of toundadons founded within simi�:� �^'.'•: could �pproach approximately one-helf of the total settlement. If possible, we recommend that the ' ' foundation elemenu be p�aced within the same soil type to minimize the mapnitude of possibie differential settlement. It shouid bs noted that differential settiement eould approach the toul settlement values if adjacent footinps are founded on different bearinp strata. At the time thic report was written, final desipn information repardin0 foundation typas or foundation or floor Orades was not available. Consequently,we cannot comment conclusively repardinp the anticipated bearinp conditions � of foundationc at specific locations. � ,. � � The hiph sensitivity of the silty site soils to disturbance may require that the footin0 excavations be covered with a lift nf crushed rock or a iean concreta"mud maY to minimize disturbance of the bearinp surface durinp eonstruction in wet weather. Under no circumstances should footinps be cast atop ' loose or soft soil, slou0h, debris, or s�rfaces bearinp standinp water. We recommend that a representative of RZA AGFA observe the condition of the footinp subprades pricr to the pourinp of co�crete, or a lean mud met, in order to verify that the bearin0 soils are undisturbed and that eonditions are consistent with the recommendations eontained within this repoK. We recommend that the sVuctures be protected from proundwater buildup by installinp a perirt�eter footinp drain system. The drain should consist of a perforated pipe embedded in an envelope of clean, , free-draininp Oranular material, such as pea pravel. Footinp drains should be directed toward appropriate storm water draina0e facilities. Roof drains should not be connected to the footinp drains, '^ rather, collected water should be directed by tiphtline to a storm water drainape facility. �, AGRA „ Earth&EnvironmentalGroup