Section 20.06.01.810 - CHECK SCALING STANDARDS OF VARIATION01.Allowable Limits of Variation. To determine a check scale as acceptable or unacceptable for Board consideration, and when the method of measurement is the Coconino Scribner decimal C log rule, a scaler must be within allowable limits of variation in the following categories: | CATEGORY | ALLOWABLE VARIATION |
Gross Volume | | For logs in round form For logs in fractional or slab form | +/- 2.0 percent +/- 5.0 percent |
Net Volume | Sawlogs | Check scale percent of defect on logs checked Up to 10 10.1 to 15 15.1 to 20 Over 20 | +/- 2.0 percent +/- 3.0 percent +/- 0.2 percent for each percent of defect +/- 5.0 percent |
| Pulp Logs | | +/- 5.0 percent |
| Cedar Product Logs | | +/- 8.0 percent |
| | Species Identification Errors | 3.0 percent |
| | Product Classification Errors | 3.0 percent |
02.Combination Logs. For purposes of determining product classification errors, combination logs are counted as one-half (1/2), one-third (1/3), one-fourth (1/4) -- depending on the number of scaling segments -- to arrive at a piece or log count variation. Combination logs will be considered only when provided for in a contractual scaling agreement or written scaling specifications.03.Check Scales Involving Multiple Variations. Some check scales will involve more than one (1) parameter of variation. The overall allowable limit of variation to determine acceptability or unacceptability of the total gross or net scales is determined by the following formula: OAV = | Click here to view image |
OAV = | overall allowable percentage variation |
A = | allowable percentage variation for gross/net sawlog scale |
B = | allowable percentage variation for gross/net pulp log scale |
C = | allowable percentage variation for gross/net cedar products scale |
D = | check scaler's gross/net sawlog scale |
E = | check scaler's gross/net pulp log scale |
F = | check scaler's gross/net cedar products log scale |
Idaho Admin. Code r. 20.06.01.810