IS 4891 : 1988 Specification for preferred cut sizes of structural timber

1 Scope

1.1 This standard covers preferred cut sizes of timber for usein the following units:

a) Roof trusses;

b) Roof purlins, rafters, floor beams, etc;

c) Partitions framing, covering;

d) Centering; and

e) Door/window/ventilators.

2 References

IS 1331 : 1971Specification for cut sizes of timber

IS 2 :1960 Rules for rounding offnumerical values

IS 1141 : 1973 Codeof practice for seasoning of timber

IS 401 : 1982Code of practice for preservation of timber