AS O57-1949
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Grading rules for sleepers for 24-in. gauge railway track (sugar cane industry)
Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users
06-30-2017
English
01-01-1949
General provisions are included for limits of accuracy, equivalent defects, seasoning allowance, cutting, and dimensions. Sizes and grade descriptions are specified for squared sleepers and round-back sleepers.
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