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Northlake 635(7)-LR000505 10575 Newkirk Street Clark Contractors Report Date: May 05, 2000 Suite 780 1333 CrestsJde Drive Report ID. No: C6'130 - 2ggo Dallas, Texas 7S220 Coppell TX 7501g- 972.831.1111 Attention: Gary Zinberg FAX ,e72.831.0800 REPORT OF COMPRESSIVE STRENGTH TESTS ProJect: PSINET f333 Crestside Drive/Coppell, Texas Location: GEAR BOX PADS - 4A, 4B, SA, 5B Cast Date: 4/7/00 Batch Time: 1:22 Test Time: 2:15 Specimens Made By: DJ Supplier: BUTLER Ticket No.: 10798 Truck Number: 227 Concrete Mix: 322 Specified Strength: 4000 psi @ 28 days PHYSICAL PROPERTIES OF CONCRETE (ASTM C143, C231, C138, C1064) Slump: 5.5 in. Air Content: 0.0 % Density: pcf. Temp.: 85 OF COMPRESSIVE STRENGTHS CASTM C39) Compressive Percent Specimen Age Dia. Area Load Strength of Type of (No.) (Days) (in.) (in.2) (lbs.) ¢l~si) f'._Ec Fracture 1 3 6.00 28.27 96,630 3420 Wedge 2 3 6.00 28.27 96,870 3430 Wedge Average: 3420 86 3 7 6.00 28. 27 101,460 3590 Wedge 4 7 6.00 28.27 119,300 4220 Wedge Average: 3900 98 5 28 6.00 28.27 173,110 6120 Shear 6 28 6.00 28.27 184,140 6510 Shear Average: 6320 158 ~.,~,~.;.,--:,. .atto...urke & cc: Co,.cr. te Su .p.or 5 '~ ..... ~'~= .: ........... *.;-~'.':. ~. PLR Construction ¥' ~i~r~. Ha - -n~r~.. .. . .e :~-"[r~. .~'~""~'~2~'~.~ , -3 .......... .'" %':5: " ~ '-' / ~ P-~X-_;'~.,-...-.... ~-.~ ."_, ~;~, PATTON, BURKE & THOMPSON, LLC Engineering Consultants