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As a result, how do consulting engineer to hold out preliminary selection of foundation? Preliminary selection of foundation are often based mostly on the earthworks drawings. an easy way is touching on the cut and fill space in earthworks drawings. Where cut space can choose as pad foundation and fill area can choose as pile foundation. When fill space is a smaller amount than 1.2m, it still may be used as footing foundation because footing need a particular depth for construct. [http://www.denichsoiltest.com บริษัทเจาะดิน] Another methodology of determination is by on website excavation, engineer need to go to site to witness the bottom condition. Engineer can observe how the excavator excavate earths. will the excavator will straightforward remove the soil. will soil is loose at vertical sides of excavation hole.