Wood size inspection

The length of the material is in meters, measured to the centimeter, less than 1cm; the diameter is in centimeters, less than 1cm; the width and thickness are in millimeters, less than 1mm; the volume is in cubic meters.

Size inspection of Sugihara

Length inspection: from the big axe (saw mouth) to the tip diameter of 6cm, 1m carry, less than 1m, from the tip end, the length after the round off is the length of the gauge. If the big head or the small head has a water eye, the length of the water eye examination should be removed.

Diameter check: The amount of inspection from the big axe (saw) 2.5m, with 2cm carry, less than 2cm, where the foot is 1cm, less than 1m, the diameter after the entrance is the gauge diameter, if used The caliper check is measured by the average number of long and short diameters after entering the house.

3. Size inspection with defective:

When checking the diameter and abnormal phenomena such as knots and tree tumors, it should be moved to the normal part for inspection. If the diameter of the part of the inspection is in the form of a pinch, partial dryness, trauma and the fall of the knot, the original shape should be restored.

2) If the big head is split, whether it is falling off or not, the maximum thickness of the section (the carry size) is equivalent to the diameter of the gauge. If it is smaller than the diameter of the gauge, it should be deducted to the length corresponding to the gauge diameter. Long, but the original inspection diameter does not change. If the length of the splitting is more than 2.5m, the gauge diameter is still measured at 2.5m from the ruler. The average length of the long and short diameters is the diameter of the test. If it has not fallen off, the original diameter (the diameter after the crack is removed) is taken as the gauge diameter after entering the house, and the length of the ruler is deducted according to the above regulations.

Log size inspection

Length inspection: If the actual length is less than the length of the gauge specified by the log standard (referred to as the long grade), but does not exceed the negative deviation, it is still calculated according to the length of the gauge specified by the standard; if the deviation is exceeded, the level is pressed. The length of the gauge is calculated.

When the kerf is biased, the straightness should be taken at the shortest distance between the sections at both ends of the head.

When logging, the roots of the roots are cut with a large axe. If the short diameter of the section is not less than the diameter of the gauge after the entrance, the length of the material is measured from the end of the big head. If it is smaller than the diameter of the gauge, it should be less than the diameter of the gauge. length. When the pocket is cut into sharp points, the length of the material should be measured from the upper edge of the axe.

Logs with water eyes near the end should be allowed to go to the inside of the water eye to the length of the end, and then determine the length of the ruler.

2, the diameter of the inspection: through the center of the small head section, the first short diameter, and then through the center of the short diameter vertical diameter to take the long diameter (with skin peeling thick), such as short diameter less than 26 cm, its long and short diameter If the difference is more than 2 cm, or the short diameter is more than 26 cm, the difference between the long and short diameters is more than 4 cm, and the average length of the long and short diameters is the diameter of the gauge after the entrance (the diameter is referred to as the diameter); the difference between the long and short diameters is smaller than The above-mentioned regulations are taken as the gauge diameter after passing through the short path. The diameter of the gauge is 2cm as a unit of enhancement. When the actual size is less than 2cm, the foot is 1cm, and less than 1cm.

1) When the log size of the log is taken under the head of the log, the ruler should be kept perpendicular to the length of the material.

2) The small head makes the log of the ruler because of the water eye, or the actual length of the log exceeds the length of the ruler, and the gauge diameter is still measured at the end of the small head.

3) If there is an outer pinch on the small head section, the gauge can be traversed on the surface of the log by the ruler.

4) Double heartwood, three heartwoods and logs with enlarged ends in the middle, the gauge diameter is measured in the normal part (the thinnest part) of the trunk.

5) If the two dry rafts of the double coffin are in the same gauge length, take the gauge diameter with a larger section; if it is not in the same gauge length, take the gauge of the longer dry section. path. The other branch is processed by the section.

6) If two logs are connected together, the scale and rating shall be separately checked.

Saw timber size inspection

1. Length inspection: Check the shortest distance between the two ends of the material in the direction of the length of the material. The actual material length is less than the standard length, but does not exceed the negative deviation, and is still calculated according to the standard length; if the negative deviation limit is exceeded, the first length is calculated, and the excess is not counted.

2, width and thickness inspection: in the length of the material to remove the 15cm of each end of any blunt edge inspection. The positive and negative deviations of sheet thickness and square width and thickness are allowed to exist at the same time and calculated separately; the actual width of the sheet is less than the standard width, but when it does not exceed the negative deviation, it is still calculated according to the standard width. If the negative deviation limit is exceeded, press it. One level width calculation.

3, standard size: the width (material width), thickness (thickness), length (length of material) listed in the various standards of sawn timber refer to the standard size.

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