<p>This Architectural Drawing is AutoCAD 2d drawing of lean Concrete on reinforcement details. lean concrete means <strong>plain cement concrete with the ratio of cement: sand: coarse aggregate equals to 1:2:4 by volume</strong>. Lean concrete shall be laid to the thickness of minimum 7.5-cm. or as specified in the Bill of Quantities or drawing. Around 3 feet is require the lean concrete fill to be placed in relatively thin lifts to avoid cracking. Typically, maximum thickness of each lean concrete fill lift is set at around <strong>3 feet</strong>. For more details and information download the drawing file.</p>