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!1 i2 Design of P-ement Structures <br /> � Yao,a�lu <br /> 4C, ? r f D O •0 <br /> -20 0 10 <br /> to <br /> do <br /> + �tilrr <br /> IC <br /> At 40 <br /> � ti <br /> 20 <br /> -40 <br /> -2 0 <br /> PEG'CN CHARACTERISTICS <br /> S Wet, no freeze - <br /> Wet, freeze—thaw cycling <br /> Wet, hard—freeze, spring thaw <br /> Dry, no freeze <br /> St Dry, freeze—thaw cycling <br /> Dry, herd freeze , spring thaw <br /> Figure 4.1. Th© six c!irnatic regions in tho United States <br /> r <br />