Not less if the room too much too small, it may not be enough, need to consider the increase in the main vice keel! The main keel spacing in the 800-1200, vice keel 600
Generally according to experience, according to the main bone 1 meter vice keel 3 meters to be strictly in accordance with the standard to count the loss, the main 1.2 vice 3.4 basic general construction unit can use the main 1 to 3 to calculate
