The Owner-built HomesteadScribner, 1977 - 394 หน้า |
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ผลการค้นหา 1 - 3 จาก 43
หน้า 77
... earth is removed with continuing excavation , caissons drop lower , guided by the cast lining above . Bored wells can also be constructed by hand labor , using a simple earth auger . The maximum practical depth is 50 feet . Usually the ...
... earth is removed with continuing excavation , caissons drop lower , guided by the cast lining above . Bored wells can also be constructed by hand labor , using a simple earth auger . The maximum practical depth is 50 feet . Usually the ...
หน้า 78
... earth as it strikes . Five - foot lengths of pipe are used for the pipe " string " and serve as the well casing when driving is com- pleted . Driving is done by either of two methods . Strike a drive cap , which covers and protects the ...
... earth as it strikes . Five - foot lengths of pipe are used for the pipe " string " and serve as the well casing when driving is com- pleted . Driving is done by either of two methods . Strike a drive cap , which covers and protects the ...
หน้า 291
... earth to make ex- cellent flooring . If you use concrete , an insulating layer of air between earth and slab is desirable . You can create this air space by rototilling the earth to a depth of 8 inches . Then , after making holes with a ...
... earth to make ex- cellent flooring . If you use concrete , an insulating layer of air between earth and slab is desirable . You can create this air space by rototilling the earth to a depth of 8 inches . Then , after making holes with a ...
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