文档介绍：THIS FILE C Y F NT ON 1 T6H 3 BE RE TiJF\ f"?[ D STRENGTH AND RELATED PROPERTIES OF WESTERN RED CEDAR POLES by W. M. McGOWAN AND W. J. SMITH Sommaire en franr;ais DEPARTMENT OF FORESTRY PUBLICATION No. 1108 1965 Published under the authority of The Honourable Maurice Sauve, ., . Minister of Forestry Ottawa, 1965 Cat. Xo. Fo57-1108 CONTENTS SCYMARY SO:\IMAIRE ............................................... . I;XTRODUCTION ................................................... . PURPOSE OF TESTS ............................................... PAGE 4 -1 TEST :,\1 A TERIAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (j TEST :.v1ETHODS--POLES....... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 TEST :.v1ETHODS···--SMALL, CLEAR SPECIMENS. . . . . . . . . . . . . . . . . . . . . . . . . . 8 CO:.V1PARISON OF POLE TEST METHODS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 DISCUSSION OF TEST RESULTS ..................................... , 10 CO:\IPARISON OF STRENGTH BE'l'WlcEN POLES GROWN AT AI/rITUDE;S OF 2,;)00 AND 4,000 FEET ......................................... , 10 COMPARISON OF STRENGTH BETWEl·;;X COAST-GHOWN AND IN'l'ERIOH- GROWN POLES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 11 EFFECT OF SHAVING METHODS AND SEASONING PHOCImUIm ON STRENGTH 11 CO:\IPARISON OF FIBRE STRESS OF POLES AND SMALL, CLEAR SP}JCIMENS CUT THEREFROM ............................................. , 13 POLE STRENGTH?SPECIFIC GRAVITY RELATIONSHIP. . . . . . . . . . . . . . . . . .. 15 STRENGTH VARIATION ............................................. , 16 STIFFNESS PHoPERTms . . . . .. . , lG ::\IOISTURE CONTENT ............................................... , 18 TARGET PATTERN .............................