The strength and deflection of putlog as easy supporting girder, and the ledger is over and supported by putlog.
横杆按照简支梁进行强度和挠度计算，大横杆在横杆的上面。
手
跳板横木；建筑支的横木The strength and deflection of putlog as easy supporting girder, and the ledger is over and supported by putlog.
横杆按照简支梁进行强度和挠度计算，大横杆在横杆的上面。
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