For bay lengths other than those shown, the maximumspacing of purlin bracing shall be 80 O. c.
凹进去的长度除了图示的以外,用于支撑的桁条的最大间距应该是80 O.C。
2
Note how the scores are separated by orders of magnitude and divisions of 10. Use broad spacing in your initial scoring setups to allow maximum flexibility as your scoring criteria changes.