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MAR-28-02 04 : 14 PM MIKE LEE, ARCHITECT 916 372 8512 P. 02 <br /> pk (N � � 3800 Seymour2-0313voicAvee <br /> -v, Wesitem Sacramento, -8 95891 <br /> (jt�jll[� d 918.372-0313 valce-vpleemall 91&372.8812 fax <br /> mleeala(Mpa.net email <br /> Ecorto Gas • NO Victor Rd., Lodi,CA 03/26/02 16:07 <br /> TANK HOLDDOWN/BUOYANCY CALCULATION-12,000 GAL. <mod12.4 Econo.xls> <br /> THIS CALCULATION IS FOR MODERN WELDING TANKS,AS DESCRIBED BELOW: <br /> CAPACITY 12000 GALLONS WEIGHT 11175 LBS. <br /> DIAMETER 8.08 FEET SUMPS 1 <br /> LENGTH $2.08 FEET <br /> TANK SLAB THICKNESS 0.75 FT. <br /> BURY DEPTH(TOP OF SLAB) 4,00 FT. <br /> ASSUME TANK AND BACKFILL COMPLETELY SUBMERGED,TO TOP OF SLAB: <br /> SUBMERGED WGT OF BACKFILL a 60.00 LBS/C,F.(PCF) <br /> SUBMERGED WGT OF CONC.- 87.60 PCF <br /> WATER= 7.48 GALS./C.F. <br /> WATER- 62.40 PCF <br /> 1. OVERBURDEN ABOVE THE TANK CAN BE CALCULATED USING THE FOLLOWING <br /> FORMULA(PER PEIIRP 100-94): <br /> ((H/3)(B1 +S2+SgRt 81.132))-((VQ)+M) <br /> D•TANK DIAMETER <br /> d-BURIAL DEPTH(to BOTTOM of SLAB)• 3.23 FT. <br /> H•(13/2)+d- 7.29 FT. <br /> L=TANK LENGTH <br /> 81 -SLAB AREA-(L+4)'(D+3)- 399.92 SQ.FT <br /> B2 a REFLECTED TANK AREA(D'L)• 259.34 SQ.FT. <br /> V a TANK DISPLACEMENT-PI'n'L- 1646.46 C.F. <br /> M=VOIDS IN OVERBURDEN•43"D.SUMPS1 SUMPM <br /> =PI'(3,58'/2)(3,58*12)' 3.25 FT.'#m 32.71 C.F. <br /> THEREFORE OVERBURDEN ABOVE TANK WOULD BE EQUAL TO: <br /> H/3 81+82 SgRtB11S2 (V/2)+M <br /> 2.43 659.26 322.05 855.94 1529,20 C.F. <br /> 1529.20 C.F.' 60.00 PCF= 91752 LBS. <br /> 2. CONCRETE SLAB a 81 'SLAB THICKNESS'CONC.WGT. - 28275 LBS, <br /> 3. TANK WEIGHT(PER MANUFACTURER). 11175 LBS, ARCH <br /> L <br /> 4. TANK TOP ANCILLARY EQUIPMENT• 1250 LBS, <br /> TOTAL UPLIFT FORCE(UF)-(V+M)'WATER.WGT.- 104780 LBS, <br /> F� <br /> TOTAL RESISTANT FORGE(RF)•(ITEMS 1.-4 J= 130452 LBS, <br /> EXCESS RESIST FORCE RF-UF- 25571 LBS.- 12.8 TONS r�OF CAL�� <br /> RF>UF,THEREFORE, HOLDDOWNS NOT REQUIRED AT 48 "MIN.BURY DEPTH. <br /> SAFETY FACTORY- RF1UF • 1.25 (DOES NOT INCLUDE FRICTION FACTORS, <br /> WHICH INCREASE MARGIN). <br /> Lftnwd Calft"la Ani C2W4 <br />