TM 5-852-4/AFM 88-19, Chap. 4
SITE CONDITIONS
LOADING CONDITIONS
2
Annual Frost Zone SILT to silty SAND
Live LOAD. 250 lb/ft
2
(Approx. thickness: 8 ft.)
Design Footing Bearing Pressure: 4000 Ib/ft
Permafrost GRAVEL through SAND to SILT
Mean Ground Temp. 27ƒF
Mean Thawing Index. t900 deg. days
Mean Freezing Index 5100 deg. days
Mean Annual Air Temp. 24ƒF
Temp Range -49F to +73ƒ F
Annual Precipitation 5 inches
U. S. Army Corps of Engineers
Figure 4-27b. Typical Pan Duct Foundation, Showing Section at Plenum Chamber and at Interior Column for Warehouse,
Sondrestrom AB, Greenland (Section at Interior column)
4-36
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