Level of state of People's Republic of China
Basic check measures conifer lumber blemish methodological GB155.3 - 84 replace GB155, 59
Coniferous Woods Defects Basic Method Of Measurement

This standard stipulates the basic check of conifer lumber blemish measures a method, apply to the log of lumber of Chinese all conifer, sawn timber and veneer product.

The classification of blemish sees GB1 55. 1 - 84 " conifer lumber blemish is classified " the name of blemish, definition and qualitative to material influence see GB155. 2, 84 " name of conifer lumber blemish, definition and qualitative to material influence " .

1 child

Section child check measures a method:

A. Section child dimension, the quantity that fasten check and lumber are fore-and-aft (vertical center line) the distance between line of parallel two sections Zhou Qie, or section child the smallest diameter of section, express with millimeter;
B. Section child diametical computation, can provide starting point, of insufficient start not plan;
C. Section child the statistic of several, the department is checked inside formulary limits calm.

The section in 1.1 log child check quantity:

Section child the check quantity of dimension, it is with truncal lengthwise direction gets the largest part into perpendicular quantity child dimension, with millimeter plan, or compare with photograph of check feet diameter, with percentage plan. Computation presses (1) type:

K=d/D*100. . . . . . . . . . . . . . . . . . . . . . . . . . . . (1)
In type: K -- part way rate, ％ ;
D -- section child diameter, mm;
D -- check feet diameter, mm.

Section child the computational start of dimension is 30 millimeter, be not worth 30 millimeter not plan.

Section child the statistic of several is grow in check feet the item is pressed inside limits child total a number or by the section child 1 most meter a medium several computation. Perfect red-letter day presses lively part computation; Decayed section presses dead section computation.

Leakage section no matter dimension size all should be checked decide its to grow a number inside limits in total talent, by whether to allow to exist, or by allow a several computation. The leakage section inside check feet long range still should be calculated its dimension.

The section in 1.2 sawn timber child check quantity:

Section child the check quantity of dimension: Circular section and elliptic section are with sawn timber lengthwise direction is measured into perpendicular check; Strip part and palm state division are with the section child perpendicular check measures itself lengthwise way its are the widest place; The part that measures child the largest size, use millimeter plan, or as wide as feet of check of place material face (the standard is wide) photograph comparing, with percentage plan. Computation presses (2) type:
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