Divided u-type light steel keel in the ceiling spacing of less than 2 meters, 2.5 meters or less, according to the large keel count spacing, or by the small keel count spacing.
Do not understand your "spacing within 2m", "2.5m or less" What does it mean. Light steel keel ceiling is a standard, the main keel and the main keel spacing between the maximum can not exceed 1.2m, if more than this distance, and should try to do reinforcement treatment;
Vice keel (should be the little keel you said) and the distance between the vice keel of 30cm, gypsum board thickness of 9.5mm. If the thickness of the gypsum board is 12mm, the distance between the vice keel can be enlarged to 40cm. But in the actual construction, the vice keel spacing is 30cm, basically no one made 40cm.
