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49930 N Santiam Hwy SE SITE VISIT REPORT Idanha, OR 97350-9503 State Farm Claim No. 37-11 K4-75P a permanent color change to pink or red, depending upon the temperature change. These types of color changes were not observed in the concrete. As discussed earlier, a rebound test hammer was used to approximate the in- situ compressive strength of the concrete stemwall. Measurements were taken at four (4) locations along the West-facing stemwall, with the wildfire being closest to this side of the house, especially at the Northwest corner. Three (3) locations were measured on the East side, for comparison with the West side, to determine if there may have been strength loss due to heat exposure on the concrete. Two (2) readings were taken at each test location. Conversion charts for rebound force to corresponding concrete compressive strength were used to approximate the in-situ strength of concrete. [See Figures 23, 24, & 25 below.] .s . � -sn CONCRETE TEST HAMMER - ROD RETRACTED & EXTENDED [FIGURES 23, 24] Location Test 1 Test 2 Average Strength Reading Reading Reading (psi) NW Corner 33 33 33 4090 NW 32 32 32 3844 West 38 37 37.5 5294 SW 34 34 34 4351 West Side Average: 4395 NE 32 34 33 4090 East 34 34 34 4351 SE 32 34 33 4090 East Side Average: 4177 CONCRETE STRENGTH TEST DATA [FIGURE 25] Rounding down to two significant figures, the average strength was approximated at 4,300 psi for the West side and 4,100 psi for the East side. Note that the concrete on the side closest to the wildfire actually measured stronger than the side furthest from the wildfire. Regardless, the measurements shown are indicative of sound concrete with sufficient strength. Code minimum strength for residential concrete foundation walls exposed to weather is 3,000 psi. Report Date: March 28, 2021 Page 11 of 44 Site Visit Date: March 6, 2021 Taylor& Syfan Consulting Engineers, Inc.