A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
In this report the results from grading of sawn timber from a timber quality called Sandeskur is shown. The timber quality is between pulpwood and the lowest saw wood quality. The sawn timber is graded according to NS-INSTA 142 and the commercial grading rules NS-EN 1611-1 and Nordic Timber. If Nordic Timber and NS-INSTA 142 are combined to an optimum the number of planks with a quality of sixth grade or worse is 33% of the total. This means that 67% of the planks have a normal and easy-to-sell quality. Grading for structural timber gave 38% T0 for spruce and 41% T0 for pine. Large knots and distribution of grain were the most frequent causes for T0 for pine, while most planks in spruce graded T0 were due to rot. The most important aspect when commercial grading rules are used is the part of planks graded sixth and worse. Better qualities are often sold together. 41-42% of the spruce-planks were graded sixth or lower, while for pine 34% (1611) and 40% (NT) of the planks were graded sixth or lower. Number of planks rejected was 8-9% for spruce and 5% for pine.
In this report the results from grading of sawn timber from a timber quality called Sandeskur is shown. The timber quality is between pulpwood and the lowest saw wood quality. The sawn timber is graded according to NS-INSTA 142 and the commercial grading rules NS-EN 1611-1 and Nordic Timber. If Nordic Timber and NS-INSTA 142 are combined to an optimum the number of planks with a quality of sixth grade or worse is 33% of the total. This means that 67% of the planks have a normal and easy-to-sell quality. Grading for structural timber gave 38% T0 for spruce and 41% T0 for pine. Large knots and distribution of grain were the most frequent causes for T0 for pine, while most planks in spruce graded T0 were due to rot. The most important aspect when commercial grading rules are used is the part of planks graded sixth and worse. Better qualities are often sold together. 41-42% of the spruce-planks were graded sixth or lower, while for pine 34% (1611) and 40% (NT) of the planks were graded sixth or lower. Number of planks rejected was 8-9% for spruce and 5% for pine.
Skurlastkvalitet fra Sandeskur (Sawn Timber Quality from Sandeskur)
A. Ovrum (author)
2002
40 pages
Report
No indication
English
| British Library Online Contents | 1996
| British Library Online Contents | 1996
Mechanical properties of sawn timber from Norway spruce
| British Library Online Contents | 1998