BS 1309-3:2018 pdf download – Round and sawn timber – Methods of measurements Part 3: Features and biological degradations

BS 1309-3:2018 pdf download – Round and sawn timber – Methods of measurements Part 3: Features and biological degradations
6.8.2 Fungal attack
6.8.2.1 Stain
Not measured, record its presence.
6.8.2.2 Rot
6.8.2.2.1 Sapwood rot and stain
Measure the maximum expansion of sapwood rot or stain (r) in radial direction at the top end surface.
6.8.2.2.2 Heartwood rot
Depending on the grading rule used,
a) record its presence, or
b) measure by stating the diameter of a circle enclosing the area affected, expressed in centimetres or as a percentage of the diameter of the end surface of the round timber.
6.8.3 Hollow
Depending on the grading rule used,
a) record its presence, or
b) measure by stating the diameter of a circle enclosing the area affected, expressed in centimetres or as a percentage of the diameter of the end surface of the round timber.
6.8.4 Other attack
Depending on the type of attack, the more appropriate method above described shall be applied. The method used shall be specified in the grading rules.
6.9 Other defects
6.9.1 Dry side
Depending on the grading rule used,
a) measure the length of the portion where it occurs, expressed in metres to two decimal places, or as a percentage of the length of round timber or estimated height of the tree, or
b) not measured, record its presence.
For round timber, it is recommended to record the distance between the larger end and the affected area. For trees, it is recommended to estimate visually the height above ground. Either to be expressed in metres to two decimal places.
6.9.2 Parasitic plant
Depending on the grading rule used,
a) measure the length of the portion where it occurs, expressed in metres to two decimal places, or as a percentage of the length of round timber or estimated height of the tree, or
b) not measured, record its presence.
For round timber, it is recommended to record the distance between the larger end and the affected area. For trees, it is recommended to estimate visually the height above ground. Either to be expressed in metres to two decimal places.
6.9.3 Carbonized wood Depending on the grading rule used, a) measure the length of the portion where it occurs, expressed in metres to two decimal places, or as a percentage of the length of round timber or estimated height of the tree, or b) not measured, record its presence. For round timber, it is recommended to record the distance between the larger end and the affected area. For trees, it is recommended to estimate visually the height above ground. Either to be expressed in metres to two decimal places.
6.9.4 Canker Depending on the grading rule used,
a) measure the length of the portion where it occurs, expressed in metres to two decimal places, or as a percentage of the length of round timber or estimated height of the tree, or
b) not measured, record its presence. For round timber, it is recommended to record the distance between the larger end and the affected area. For trees, it is recommended to estimate visually the height above ground. Either to be expressed in metres to two decimal places. 6.9.5 Bird peck Not measured, record its presence.
6.10 Tapping cut Depending on the grading rule used,
a) measure the length of the portion where it occurs, expressed in metres to two decimal places, or as a percentage of the length of round timber or estimated height of the tree, or
b) not measured, record its presence. For round timber, it is recommended to record the distance between the larger end and the affected area. For trees, it is recommended to estimate visually the height above ground. Either to be expressed in metres to two decimal places.BS 1309-3 pdf download.