<p>This Architectural Drawing is section of details of soil in construction. <strong>Loam is the best soil type for construction</strong> due to its ideal combination of silt, sand, and clay. It combines the best of all their qualities into the ideal balance for supporting a foundation. Loam generally does not shift, expand, or shrink drastically and handles the presence of water very well. OSHA classifies soils into <strong>three main groups</strong>: Type A, Type B, and Type C. Type A is the most stable and Type C is the least stable soil. To determine the soil type on a construction site, there are several tests that a competent person can use. For more information and knowledge download the drawing file.</p>