| 检尺径 |
检尺长(尺) |
|
| (寸) |
21 |
22 |
23 |
24 |
25 |
|
|
板方尺 |
|
| 21 |
400 |
420 |
440 |
460 |
470 |
|
| 22 |
440 |
460 |
480 |
500 |
520 |
|
| 23 |
490 |
520 |
540 |
560 |
590 |
|
| 24 |
530 |
550 |
580 |
610 |
630 |
|
| 25 |
600 |
630 |
660 |
690 |
720 |
|
| 26 |
660 |
690 |
720 |
750 |
780 |
|
| 27 |
720 |
750 |
790 |
820 |
860 |
|
| 28 |
760 |
800 |
840 |
870 |
910 |
|
| 29 |
800 |
840 |
870 |
910 |
950 |
|
| 30 |
860 |
900 |
940 |
990 |
1030 |
|
| 31 |
930 |
980 |
1020 |
1070 |
1110 |
|
| 32 |
970 |
1010 |
1060 |
1100 |
1150 |
|
| 33 |
1030 |
1080 |
1130 |
1180 |
1220 |
|
| 34 |
1050 |
1100 |
1150 |
1200 |
1250 |
|
| 35 |
1150 |
1200 |
1260 |
1310 |
1370 |
|
| 36 |
1210 |
1270 |
1330 |
1380 |
1440 |
|
| 37 |
1350 |
1420 |
1480 |
1540 |
1610 |
|
| 38 |
1400 |
1470 |
1530 |
1600 |
1670 |
|
| 39 |
1500 |
1540 |
1610 |
1680 |
1750 |
|
| 40 |
1580 |
1660 |
1730 |
1810 |
1880 |
|
|
|
|
|
|
|
|
| 表中公式: |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
V------材积(板尺); L----材长(尺): |
|
A----绘在小头断面上的板图形面积(平方寸) |
|
|
|
|
|
|
| 谢谢指导! |