What are the main grades defined in IS 15455 for split canes?

The standard defines two grades: Grade I and Grade II, based on the type and extent of permissible defects (Clause 5).

Are borer holes allowed in Grade I split canes?

No, Grade I split canes shall be completely free from borer holes (Table 1).

What is the specified moisture content for graded canes?

The moisture content shall be between 8 and 12 percent at the time of inspection (Clause 4.1).

What is the minimum acceptable length for split canes under this standard?

The minimum length shall be 1.5 meters, unless otherwise specified by the purchaser (Clause 6.1).

IS 15455

: 2004

Grading rules for split canes

CurrentSpecializedCode of PracticeMaterials Science · Timber and Timber Stores

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This standard specifies the grading rules for split canes based on defects such as borer holes, fungal stains, cracks, and discoloration. It classifies canes into Grade I and Grade II to ensure quality for their end-use in furniture, handicrafts, and other products.

Grading rules for split canes

Quick Reference Values

Required moisture content at time of inspection8 to 12 percent

Minimum length of split canes1.5 m

Permissible borer holes for Grade INil

Permissible borer holes for Grade IINot more than 2 holes per metre length

Permissible cracks for Grade INil

Permissible discoloration for Grade INot more than 5 percent of the surface area

Practical Notes

Proper seasoning to achieve a moisture content between 8% and 12% is crucial before grading to prevent future defects.

Grading is primarily a visual inspection process. A good light source is essential for accurately identifying defects like fine cracks and borer holes.

Always check for live insect infestation, as this will lead to immediate rejection regardless of other quality parameters.